What to Put on a Tattoo

No. Not on a fresh one and not as your everyday lotion afterwards. The American Academy of Dermatology's own tattoo-care page tells tattooed people to apply a water-based lotion or cream, and states that petroleum-based products, such as petroleum jelly, can cause the ink to fade.

The AAD's wording, quoted exactly from its page Caring for tattooed skin: “If your tattooed skin feels dry, apply a water-based lotion or cream to the tattoo. Petroleum-based products, such as petroleum jelly, can cause the ink to fade.” That is a dermatology professional body naming the product by name and telling you not to use it on a tattoo. It is the single most authoritative statement available on this question, and it is why the answer here is no.

What Vaseline actually is

White petrolatum, essentially in full. It is an occlusive: it does not moisturise skin so much as seal it, slowing water loss through the surface. That is a real and useful property, and it is why petrolatum has a long history in wound care rather than a fringe one. The moist-wound-healing idea that underwrites the whole category traces back to Winter's experiment on scab formation and the rate of epithelialisation in superficial wounds in young domestic pigs (Nature 1962;193:293–294, PMID 14007593). That citation was verified; the 1962 paper predates structured abstracts and the full text was not retrieved for this page, so nothing more specific is claimed from it than what its title states.

Petrolatum is not a dangerous substance, and pretending otherwise is dishonest

Plenty of tattoo writing implies petroleum jelly is somehow toxic or infection-promoting. The best available trial says the opposite. Smack and colleagues randomised 922 dermatologic-surgery patients with 1,249 wounds to white petrolatum or bacitracin ointment, double-blind, with four weeks of follow-up (JAMA 1996;276(12):972–977, PMID 8805732).

• Infection. 9 of 440 (2.0%) on white petrolatum versus 4 of 444 (0.9%) on bacitracin. 95% CI for the difference −0.4% to 2.7%, P = .37 — not statistically significant.
• Allergic contact dermatitis. Zero on white petrolatum versus 4 (0.9%) on bacitracin, P = .12.
• Healing. No clinically significant difference at day 1 (P = .98), day 7 (P = .86) or day 28 (P = .28).
• The finding that cuts against petrolatum, stated rather than buried. 8 infections (1.8%) in the petrolatum group were caused by Staphylococcus aureus versus none in the bacitracin group, P = .004 — the one result in the trial that reached significance.

The authors' conclusion was that white petrolatum is a safe, effective wound care ointment for ambulatory surgery. So the case against Vaseline on a tattoo is not a safety case. It is a pigment case, and it comes from the AAD.

It is good at the job it was designed for and wrong for this one. Petrolatum is among the best-evidenced occlusives in wound care and caused zero allergic reactions across 440 surgical patients. On a tattoo, dermatology guidance still says water-based lotion instead, because petroleum-based products can fade the ink.

People asking this are usually asking two different questions at once, and they have different answers:

The practical version: if the goal is a tattoo that still looks like itself in ten years, a fragrance-free water-based lotion does the moisturising job without the objection attached. There is no upside to petrolatum here that the lotion does not also deliver.

Nothing dramatic. One application is not an emergency and will not ruin the piece. Wash it off gently with lukewarm water and plain fragrance-free soap, pat dry with something clean, and go back to whatever your artist told you to use. Then stop thinking about it.

This question gets asked in a panic, so it is worth being blunt about the scale of what happened. The evidence above is that petrolatum is a low-allergy, well-tolerated wound ointment that performed identically to a prescription-grade alternative on healing at days 1, 7 and 28. The objection to it on tattoos is a cumulative, long-horizon pigment concern from the AAD, not an acute injury mechanism. A single coat that you removed within a few hours is not a meaningful dose of anything.

What actually matters after the mistake

• Do not scrub it off. Friction on healing skin is a real problem in a way that one coat of petrolatum is not. Lukewarm water, a soft touch, plain soap, pat dry.
• Do not double up to compensate. Piling lotion on top of ointment is how people end up with a soggy, macerated surface. Go back to thin coats on the normal schedule.
• Do not re-wrap it unless your artist told you to. If you are in adhesive film and got jelly under the seal, the film is compromised — message the studio rather than improvising a replacement.
• Watch for the things that would matter with any product. Spreading redness past the tattoo after day three, pus, worsening pain after day three, fever. Those are reasons to call someone, and they are not caused by petroleum jelly.

If you have been using it for a week or two rather than once, the answer is the same and slightly less relaxed: switch to a fragrance-free water-based lotion now, and mention it at your touch-up appointment so your artist can look at the piece with that context. Nobody can tell you from a description whether pigment moved.

No, and this is the strongest no on the page. Neosporin's own FDA label says do not use it over large areas of the body. A tattoo is a large area. Two of its three antibiotics, neomycin and bacitracin, are among the best-documented contact allergens in dermatology.

What the label itself says

From the FDA drug label for Neosporin Original Ointment on DailyMed. Active ingredients per gram: bacitracin zinc 400 units, neomycin sulfate 3.5 mg, polymyxin B sulfate 5,000 units, in a petrolatum base. The label's own instructions, verbatim:

You do not need a study to rule this out. The manufacturer already did, on the box.

The allergy problem, with numbers

Both of the relevant antibiotics have documented histories as contact allergens:

• Bacitracin was named Allergen of the Year by the American Contact Dermatitis Society in 2003 (Sood A, Taylor JS, Am J Contact Dermat 2003;14(1):3–4, PMID 14744414).
• Neomycin patch-test sensitivity runs at roughly 1% in the general population. In the study that established the link to real-world exposure, use tests were positive in seven of eight subjects with a strongly positive patch test — and the products used in those tests were Neosporin ointment and Neosporin G cream (Prystowsky SD et al., Arch Dermatol 1979;115(6):713–715, PMID 453873). That paper is about this exact product.
• The broader picture is reviewed in Gehrig KA, Warshaw EM, J Am Acad Dermatol 2008;58(1):1–21 (PMID 18158924), which describes allergic contact dermatitis to topical antibiotics as rare but well documented, and worse in at-risk populations.

And the antibiotic bought nothing measurable

Go back to the Smack trial. Bacitracin ointment versus plain white petrolatum, 922 patients: the infection difference was not statistically significant (P = .37), there was no healing difference at any timepoint, and the bacitracin arm produced four cases of allergic contact dermatitis while the petrolatum arm produced none. On clean surgical wounds, in a randomised double-blind trial, the antibiotic delivered no demonstrated infection benefit and carried an allergy cost. That is the best direct comparison available, and it does not favour reaching for the antibiotic tube.

The reason this is worse than a wasted product

An allergic contact dermatitis reaction to neomycin or bacitracin looks like an infection. Red, angry, itchy, weeping, sometimes bumpy or pustular. People who get it frequently respond by applying more ointment, which is the one thing guaranteed to prolong it, and sometimes by seeking antibiotics for an infection they do not have. If your grandmother hands you the tube, thank her and put it down. And note that 14.9% of the 700 American aftercare sheets Liszewski's team collected were still recommending topical antibiotics — so being told to use it by a studio is not evidence either.

Not at Apollo, and there are two separate reasons. Its FDA label lists petrolatum 41% as the active ingredient, which puts it squarely in the petroleum-based category the AAD tells tattooed people to avoid. It also contains lanolin alcohol, the 2023 Allergen of the Year.

Aquaphor is the most defensible product on this page's no-list, so it deserves a fair hearing. It is widely used across the tattoo industry, it is a genuinely good ointment, and it is not going to hurt you. The objections are specific.

What is in the tube

From the Aquaphor Healing Ointment label on DailyMed — active ingredient petrolatum 41%, a skin protectant. Inactive ingredients, verbatim: mineral oil, ceresin, lanolin alcohol, panthenol, glycerin, bisabolol. Its labelled uses include temporarily protecting minor cuts, scrapes and burns, and relieving chapped or cracked skin.

Objection one: it is a petroleum-based product

Forty-one percent petrolatum plus mineral oil and ceresin is a petroleum-based ointment by any reading. Whatever weight you give the AAD's fading statement about petroleum jelly, that weight transfers here. There is no version of the argument where Vaseline is out and Aquaphor is in on ingredient grounds — they are the same category with the same active.

Objection two: lanolin

Lanolin was named the American Contact Dermatitis Society's Allergen of the Year for 2023 (Johnson H, Norman T, Adler BL, Yu J, Cutis 2023;112(2):78–81, PMID 37820332). The paper is careful, and so is this page: lanolin is described there as “thought to be a rare sensitizer in patients with healthy skin”, but with the qualifier that “those with chronic inflammatory skin conditions are at a higher risk”. The paper also notes that the correct patch-test formulation for lanolin is contested, so even the prevalence figures carry an asterisk.

The relevance to tattoos is the qualifier, not the headline. A fresh tattoo is broken, inflamed skin by definition. Applying a known — if uncommon — sensitiser to inflamed skin, several times a day, for two weeks, on a surface much larger than a chapped lip, is a different exposure from dabbing it on a cracked knuckle in winter. That is a reasoned inference from the paper's own qualifier, not a finding the paper reports about tattoos.

Objection three, which is the one artists actually complain about

It is thick, and almost everyone uses too much. A heavy occlusive layer over a weeping surface traps plasma against the skin and softens scabs that should be drying. This is practitioner observation from the studio floor, stated as such. No trial has compared application thickness on tattoos, because as far as this page could establish, no randomised trial of tattoo aftercare products exists at all.

The one with the shortest ingredient list. Fragrance-free, dye-free, water-based. Fragrance mix I is the third most common allergen in North American patch testing, and its oxidation products are the fourth. Apollo's shortlist is Lubriderm Fragrance-Free, CeraVe, Cetaphil and Eucerin Original Healing.

Notice that none of those is a tattoo product. That is deliberate.

Why fragrance is the thing to screen out

The North American Contact Dermatitis Group patch-tested 4,121 patients in its 2019–2020 cycle. 2,871 of them (69.7%) had at least one positive reaction, and 2,095 (51.2%) had a primary diagnosis of allergic contact dermatitis (DeKoven JG et al., Dermatitis 2023;34(2):90–104, PMID 36917520). The most commonly positive allergens:

Critical caveat. These are people referred for patch testing because they already had suspected contact dermatitis. This is not the rate in the general population and must never be quoted as one. What it establishes is the ranking: among substances that cause contact allergy, fragrance and its oxidation products are near the top, and two of the five slots are fragrance-related.

Two practical consequences. First, “unscented” is not the same as “fragrance-free” — unscented products routinely contain masking fragrance to cover a base odour. Read for the words fragrance-free. Second, methylisothiazolinone and benzisothiazolinone are preservatives, not perfumes, and they occupy two more of those five slots. A shorter ingredient list reduces exposure to all of it at once, which is the actual reason to prefer a boring lotion.

On tattoo-branded aftercare products

Liszewski's audit found 70 different moisturisers recommended across 700 instruction sheets, of which 22 were niche products made specifically for tattoo aftercare. No trial ranks them against each other, and none was located ranking any of them against a drugstore fragrance-free lotion. A tattoo-specific label is a marketing claim. It may well be a perfectly good lotion; it is not evidence of a better one.

How to apply it

Thin. The goal is to stop the skin cracking and pulling, not to seal it under a layer. If it looks shiny five minutes later, that was too much. Two to three times a day is the working range for most placements once the film comes off — but if your artist gave you a different number, use theirs.

Plain, fragrance-free liquid soap and lukewarm water, applied with clean hands. Not antibacterial soap. In 2016 the FDA ruled that 19 antiseptic wash active ingredients, including triclosan and triclocarban, are not generally recognised as safe and effective in consumer washes.

What the FDA actually determined

The rule is Safety and Effectiveness of Consumer Antiseptics; Topical Antimicrobial Drug Products for Over-the-Counter Human Use, 81 FR 61106, published 6 September 2016 and effective 6 September 2017 (Federal Register document 2016-21337). Quoting the rule text directly:

On the effectiveness side, the FDA's standard was that a consumer antiseptic wash must be shown, through studies demonstrating a direct clinical benefit, to be “superior to washing with nonantibacterial soap and water in reducing infection”. That showing was not made. Two points of scope, because this rule is routinely overstated: it covers liquid, foam and gel hand soaps, bar soaps and body washes, and it does not cover hand sanitisers, wipes, or antiseptics used in health-care settings. Regulatory action on three further ingredients — benzalkonium chloride, benzethonium chloride and chloroxylenol — was deferred rather than decided.

The step almost every aftercare sheet leaves out

Liszewski's audit is worth reading twice on this point. Most of the 700 sheets recommended antibiotic soaps, including chlorhexidine, for the tattoo. Few told the client to wash their hands before touching it. The sheets specify an antiseptic the FDA has since removed from consumer washes for lack of demonstrated benefit, and omit hand hygiene, which is the single most evidenced intervention in all of infection control. If you change one thing after reading this page, change that one.

The working method

• Wash your hands first, properly, with soap and water.
• Lukewarm water, never hot. Hot water on a fresh tattoo increases discomfort and swelling with no benefit.
• Fingertips only. No washcloth, no loofah, no scrubbing — friction is the thing to avoid.
• Plain fragrance-free liquid soap. Bar soap sitting in a shared dish is a hygiene problem for a different reason than its formulation.
• Rinse fully, pat dry with a clean paper towel, and let it air a minute before lotion.
• Frequency comes from your artist. If you are in adhesive film, you are probably not washing the tattoo at all until the film comes off.

Not while it is still broken skin — sunscreen is not formulated for open wounds. Keep a fresh tattoo out of direct sun instead. Once it has healed, the AAD recommends broad-spectrum, water-resistant SPF 30 or higher, applied 15 minutes before going outside and reapplied every two hours.

The AAD's wording, quoted exactly: “Protect your tattoo from the sun. Ultraviolet (UV) light can fade some tattoo inks. When you're in the sun, protect your tattoo by applying a broad-spectrum, water-resistant sunscreen with a Sun Protection Factor (SPF) of 30 or more. Apply the sunscreen 15 minutes before you go outside and reapply at least every two hours.”

And on tanning: “Stay out of tanning beds and away from sunlamps. These devices may also fade the ink in tattoos and can increase your risk of skin cancer. In some people, the UV light may also react with the tattoo ink, causing a painful skin reaction.” That last clause is worth noticing. It describes a photo-reaction between UV and pigment, which is a different mechanism from fading and a reason to take shade seriously beyond cosmetics.

Practically: cover the piece with clothing for the first few weeks rather than reaching for a bottle. Shade and a sleeve are free, carry no formulation questions, and do not require applying a cosmetic product to an open wound.

No — and specifically not because it is dangerous, but because there is nothing underneath the recommendation. Every coconut-oil wound-healing study located for this page was done in rats, in cell cultures, or in engineered scaffolds. None was in humans. None was about tattoos.

What the coconut-oil literature actually consists of

• Rats. Nevin KG, Rajamohan T, Skin Pharmacol Physiol 2010;23(6):290–297 (PMID 20523108) applied virgin coconut oil to excision wounds in three groups of six female Sprague-Dawley rats and reported faster epithelialisation and increased collagen cross-linking. Eighteen rats. Excision wounds, not tattoos.
• Cell lines and a rat aorta. Ibrahim AH et al., Am J Transl Res 2017;9(11):4936–4944 (PMID 29218091) tested fermented virgin coconut oil on cultured endothelial, fibroblast and retinal-ganglion cells and in a rat aortic ring assay.
• A single fibroblast line. Silalahi J et al., Open Access Maced J Med Sci 2019;7(19):3164–3168 (PMID 31949510) measured proliferation and COX-2 expression of NIH 3T3 cells with hydrolysed coconut oil.

Nothing in that list is a person, and nothing in it is a tattoo. Animal and in-vitro work is how a hypothesis starts, not how it finishes. Presenting it as a reason to put an oil on your own open wound skips every step in between.

The same reasoning covers the rest of the shelf

Olive oil, shea butter, cocoa butter, vitamin E oil, tea tree and other essential oils, honey, aloe straight from the plant. The pattern is identical: plausible mechanism, some animal or laboratory data, no human tattoo evidence. Two additional practical notes, offered as observation rather than as findings: coconut oil is comedogenic, which matters on chest, back and shoulder placements where the skin is already acne-prone; and essential oils are a recognised source of contact allergy, which is the same problem as fragrance in a lotion, in a more concentrated form.

Being edible, plant-derived or traditional is not a wound-care credential. If the case for a product is that it is natural, that is not a case.

At Apollo, a medical-grade adhesive film — Saniderm, Recovery Derm Shield or an equivalent — applied by the artist at the end of the session and worn continuously for five to seven days. No ointment goes underneath it. After it comes off, unscented water-based lotion in thin coats.

The film holds plasma and lymph in a sealed but breathing environment, keeps the piece away from fingernails, clothing and friction, and removes most of the hands-on washing phase that used to define aftercare. Clients with a confirmed adhesive allergy, placements where the film will not hold a seal, and anyone who simply prefers not to use it go on the open-air fallback instead: wash gently twice a day, thin coats of fragrance-free water-based lotion, from day one.

Stated at the right strength

That is Apollo's current protocol and the studio stands behind it, but it is practitioner practice, not a published finding. No randomised trial comparing adhesive film against open-air lotion aftercare on tattoos was located for this page. The Liszewski audit is the closest thing to evidence about what studios do, and its finding is that studios disagree with each other enormously and mostly reason from personal experience. Apollo is inside that description, not outside it.

The one rule that overrides everything on this page

Your artist's aftercare sheet wins. They saw the piece, they know how deep they worked, what the placement does under clothing and how your skin took the ink. This page is written to make you literate about the products so you can ask better questions — not to give you grounds to overrule the person who put the tattoo in. If your artist's instructions conflict with something here, follow your artist and ask them why. A studio that cannot explain its own protocol is telling you something useful.

Nobody has measured it. No published study establishes tattoo healing duration by objective criteria in a human cohort. What follows is what a working studio observes, labelled as observation — with the two real measurements that do exist in the literature set alongside it.

That opening is not false modesty. Apollo traced the citation chain behind the universal “two to three weeks” figure on its sourced tattoo facts page and it terminates in a 2012 narrative review of emergency complications and a 1992 forensic-pathology review, neither of which measured healing duration. The American Academy of Dermatology publishes no duration figure at all. So read the table below as a studio's pattern-recognition across a large caseload, which is genuinely useful, and not as a clinical measurement, which it is not.

What has actually been measured, and what it is not

For the layer-by-layer biology and the full timeline in narrative form, see the tattoo healing guide. For the day-by-day aftercare calendar, product checklist and troubleshooting, see the tattoo aftercare guide. For the citation chain behind the healing-duration figure and the rest of the tattoo evidence base, see tattoo facts.

Often you cannot, and that is the honest answer. Allergic contact dermatitis from an ointment and an early bacterial infection can both present as red, hot, swollen and weeping. This is a diagnosis, not a text-message question, and the studio is not a medical provider.

What a studio can do is tell you whether what you are describing sits inside the normal healing band or outside it, and how urgently to move. What it cannot do is diagnose. The distinction matters most with topical antibiotics, because a neomycin or bacitracin reaction mimics infection well enough that people commonly treat it with more of the thing causing it.

Rough patterns, offered as orientation and not as diagnosis

• Tracks the product, not the wound. A rash whose border matches where you applied something, including skin outside the tattoo, points toward a contact reaction. Redness radiating outward from the tattoo itself points the other way.
• Itch versus pain. Contact dermatitis is usually dominated by itch. Infection is usually dominated by pain, and by pain that is getting worse rather than better.
• Timing. Healing discomfort peaks early and declines. Anything that starts improving and then reverses after day three deserves attention regardless of which cause it turns out to be.

Call a doctor, urgent care or a dermatologist

• Redness spreading outward beyond the tattoo after day three.
• Pus, or yellow-green discharge, or a foul smell. Clear-to-straw plasma in the first couple of days is normal; thick opaque discharge is not.
• Fever, chills or body aches.
• Pain increasing after day three instead of decreasing.
• Swelling that had gone down and has come back.
• A rash spreading beyond the tattoo outline, or persistent bumps confined to one colour.

Go to an emergency department the same day

• Red streaking lines moving away from the tattoo.
• Difficulty breathing, body-wide hives, or facial swelling.

If you were tattooed at Apollo and something looks wrong, send the studio a daylight photo. We would much rather answer ten is-this-normal messages than miss the one that was not. Caught at day five, most things are a smaller problem than the same thing at day twenty-five — but the call about whether it is medical belongs to a clinician.

• Liszewski W, Newcomer J, Laumann AE, Leger MC, Farah RS. An Analysis of the Content and Recommendations of 700 American Tattoo Aftercare Instructions. Dermatology 2023;239(6):988–995. PMID 37604151. 700 instruction sheets, all 50 states and Washington D.C.
• American Academy of Dermatology, Caring for tattooed skin. Page retrieved and read in full. Source of the water-based-lotion recommendation, the petroleum-jelly fading statement and the sun-protection guidance. It publishes no healing duration.
• Smack DP, Harrington AC, Dunn C, Howard RS, Szkutnik AJ, Krivda SJ, Caldwell JB, James WD. Infection and allergy incidence in ambulatory surgery patients using white petrolatum vs bacitracin ointment. A randomized controlled trial. JAMA 1996;276(12):972–977. PMID 8805732. 922 patients, 1,249 wounds. Surgical wounds, not tattoos.
• Sood A, Taylor JS. Bacitracin: allergen of the year. Am J Contact Dermat 2003;14(1):3–4. PMID 14744414.
• Prystowsky SD, Nonomura JH, Smith RW, Allen AM. Allergic hypersensitivity to neomycin. Relationship between patch test reactions and “use” tests. Arch Dermatol 1979;115(6):713–715. PMID 453873. The use tests used Neosporin ointment and Neosporin G cream.
• Gehrig KA, Warshaw EM. Allergic contact dermatitis to topical antibiotics: Epidemiology, responsible allergens, and management. J Am Acad Dermatol 2008;58(1):1–21. PMID 18158924.
• DeKoven JG, Warshaw EM, Reeder MJ, et al. North American Contact Dermatitis Group Patch Test Results: 2019–2020. Dermatitis 2023;34(2):90–104. PMID 36917520. 4,121 patch-tested patients — a referral population, not the general population.
• Johnson H, Norman T, Adler BL, Yu J. Lanolin: The 2023 American Contact Dermatitis Society Allergen of the Year. Cutis 2023;112(2):78–81. PMID 37820332.
• Fauger A, Sonck S, Kluger N, Chavagnac-Bonneville M, Sayag M. Tattoo aftercare management with a dermo-cosmetic product. J Cosmet Dermatol 2022;21(3):1051–1056. PMID 33884740. 30 subjects, 14 days, no control arm, manufacturer-affiliated authorship.
• Kröger M, Schleusener J, Lademann J, Meinke MC, Jung S, Darvin ME. Tattoo Pigments Are Localized Intracellularly in the Epidermis and Dermis of Fresh and Old Tattoos. Dermatology 2023;239(3):478–493. PMID 36787702. One subject with a fresh tattoo.
• Baranska A, Shawket A, Jouve M, et al. Unveiling skin macrophage dynamics explains both tattoo persistence and strenuous removal. J Exp Med 2018;215(4):1115–1133. PMID 29511065. Mouse model.
• Winter GD. Formation of the scab and the rate of epithelization of superficial wounds in the skin of the young domestic pig. Nature 1962;193:293–294. PMID 14007593. Citation verified; the paper carries no abstract in the databases and the full text was not retrieved, so nothing beyond its title is claimed from it.
• Nevin KG, Rajamohan T. Effect of topical application of virgin coconut oil on skin components and antioxidant status during dermal wound healing in young rats. Skin Pharmacol Physiol 2010;23(6):290–297. PMID 20523108. 18 rats.
• Ibrahim AH, Li H, Al-Rawi SS, et al. Angiogenic and wound healing potency of fermented virgin coconut oil. Am J Transl Res 2017;9(11):4936–4944. PMID 29218091. Cell lines and rat aortic ring assay.
• Silalahi J, Yuandani Y, Meliala DIPB, Margata L, Satria D. The Activity of Hydrolyzed Virgin Coconut Oil to Increase Proliferation and Cyclooxygenase-2 Expression towards on NIH 3T3 Cell Line in Wound Healing Process. Open Access Maced J Med Sci 2019;7(19):3164–3168. PMID 31949510. Single fibroblast cell line.
• United States Food and Drug Administration. Safety and Effectiveness of Consumer Antiseptics; Topical Antimicrobial Drug Products for Over-the-Counter Human Use. Final rule, 81 FR 61106, 6 September 2016, effective 6 September 2017. Federal Register document 2016-21337. Full rule text retrieved and quoted directly.
• DailyMed, United States National Library of Medicine. NEOSPORIN Original Ointment FDA drug label — active and inactive ingredients, uses, warnings and directions quoted verbatim.
• DailyMed, United States National Library of Medicine. AQUAPHOR HEALING petrolatum ointment FDA drug label — active and inactive ingredients quoted verbatim.

What this page could not source

• A measured rate at which petroleum-based products fade tattoo ink. The AAD states that they can. No study measuring it was located. The recommendation is reported as professional guidance, which is what it is.
• A measured rate at which UV fades tattoo ink, or at which sunscreen prevents that. Same position. The AAD's own wording carries two hedges, “can” and “some”.
• Any randomised trial of tattoo aftercare products. None was located. Every product verdict on this page therefore rests on general wound-care evidence, allergen data, regulatory determinations, product labelling, or declared studio practice — never on a tattoo-specific trial, because there does not appear to be one.
• Any comparison of adhesive-film aftercare against open-air lotion aftercare. Apollo prefers the film. That preference is practitioner judgement and is labelled as such throughout.
• Any evidence that a tattoo-branded aftercare product outperforms a plain fragrance-free drugstore lotion. Seventy moisturisers are recommended across American aftercare sheets and none of them has been ranked against another in a trial this page could find.
• Any human study of coconut oil, or any other food oil, on tattooed skin. The literature is animal and in-vitro only.