Three ingredients do the work in an Asuno tanning gummy: one for colour, one for skin quality, one for stability and a clear nutritional role. Here's what each one actually is, and what it does.
Beta-carotene tints, with solid published evidence behind the colour change. Astaxanthin brings modest, still-developing evidence for skin quality. Vitamin C contributes to normal collagen formation, one of the clearest established roles in the formula. Amounts matter as much as names, which is why every one is printed on our panel.
Our supplement facts panel
Naming an ingredient is the easy part. Printing the amount next to it is the part most labels in this category skip, so here's ours, photographed as sold.
from Blakeslea trispora (fungal fermentation)
The orange pigment in carrots, sweet potatoes and pumpkin. The body converts some into vitamin A and stores the rest, including in the fat layer under skin, which is where the tint comes from.
What the evidence supportsA 2015 trial in PLOS ONE gave 81 people a daily smoothie with 21.02 mg of beta-carotene and measured facial skin with a colorimeter. After four weeks, yellowness had risen 3.382 units and redness 1.077, while lightness didn't shift. Real, measured, specifically a warming rather than a darkening.
Worth knowingIt's a tint, not a tan. The FDA is direct: colour from an ingested pigment "is not the result of an increase in the skin's supply of melanin." No melanin means no UV protection, so sunscreen stays part of the routine either way.
from Haematococcus pluvialis micro-algae
A red carotenoid: it's what makes salmon flesh pink, and the fish accumulate it from their diet. Ours is the algae extract, not a marine-animal source.
What the evidence supportsA 2021 meta-analysis in Nutrients pooled nine randomised trials of oral astaxanthin. Skin moisture improved (SMD 0.53, p=0.03). Elasticity improved (SMD 0.77, p=0.009, though the trials disagreed with each other substantially). Wrinkle depth did not improve (SMD −0.26, p=0.11, not significant).
How it fits the formulaIt's a genuinely interesting ingredient with a research area that's still developing, and at 2 mg it sits alongside beta-carotene as the second carotenoid in the blend, contributing to the warm tint in its own right.
ascorbic acid
Vitamin C contributes to normal collagen formation for the normal function of skin, one of the clearest established nutritional roles in the formula. It describes a nutrient's role in ordinary physiology rather than a result you'll see in the mirror, and it's a real, useful role either way.
Its other jobCarotenoids oxidise, and vitamin C helps with shelf stability. Less exciting, equally real.
What each ingredient brings to the formula
Here's what's actually known for each ingredient, in three separate categories that don't reduce to one number:
| Ingredient | Direct human skin-colour evidence | Formula-specific evidence | Established nutritional role |
|---|---|---|---|
| Beta-carotene | Strong: a published, replicated colorimeter trial | Extrapolated: our 4 mg dose wasn't itself trialled | Yes: vitamin A precursor |
| Astaxanthin | Limited: moisture/elasticity data, not colour-change data | Extrapolated: our 2 mg dose wasn't itself trialled | Context-dependent: no established dietary requirement |
| Vitamin C | None claimed: not sold as a colour ingredient | Direct: EU claim applies at this dose range | Yes: essential nutrient |
What about "melanin gummies"?
People search for these, and the term is close to a category error. Melanin is the pigment your skin manufactures in response to UV. Eating it doesn't raise the amount your skin produces, and no supplement can put melanin into skin the way carotenoids put carotenoids into it.
Products sold under that name are, in practice, carotenoid gummies. Worth knowing what you're actually looking at when you compare two labels.
The confusion is understandable. Both melanin and carotenoids change skin colour, both are natural pigments, and marketing copy rarely explains the difference. But the mechanisms don't overlap: melanin is produced by cells in your skin called melanocytes, mostly in response to UV exposure, and it's part of your body's own defence system. Carotenoids arrive from outside, through food or a supplement, and settle passively in fat. One is manufactured; the other is deposited. That distinction is the whole reason a tanning gummy can change your colour without changing your sun protection.
Beta-carotene does the visible work, and it's the ingredient with the strongest published evidence behind the colour change. Astaxanthin adds a second carotenoid with its own developing skin research. Vitamin C contributes to normal collagen formation and keeps the other two stable in the pouch. Three ingredients, each with a job, each printed with its amount.
What that looks like in a daily gummy
All of that chemistry sits inside two soft, peach-mango gummies you'd eat once a day, the way you would any other supplement: not a smoothie, not a shot, not something you measure out. Pectin stands in for gelatin, so they're vegan, and the astaxanthin comes from algae rather than shellfish. It's the same 4 mg beta-carotene, 2 mg astaxanthin and 50 mg vitamin C from the panel above, in the form you'd actually reach for.
Peach-mango, two a day, vegan. The atlas above is exactly what's inside.
Questions about the ingredients
What is astaxanthin in tanning gummies for?
Is astaxanthin the same as beta-carotene?
Are the ingredients vegan?
What ingredient should I avoid?
How much beta-carotene and astaxanthin does Asuno use?
- Zhou X, Cao Q, Orfila C, Zhao J, Zhang L. Systematic Review and Meta-Analysis on the Effects of Astaxanthin on Human Skin Ageing. Nutrients, 24 August 2021.
- Tan KW, Graf BA, Mitra SR, Stephen ID. Daily Consumption of a Fruit and Vegetable Smoothie Alters Facial Skin Color. PLOS ONE, 17 July 2015.
- U.S. Food and Drug Administration. Tanning Pills. Content current as of 15 March 2022.
- Asuno Tanning Gummies supplement facts panel, as packaged and sold.
This article is general information about ingredients and published research. It isn't medical advice. If you're pregnant, breastfeeding, taking medication or managing a health condition, check with your doctor before starting any supplement.
