Collagen has become the word consumers expect to read on a beauty supplement. Yet the skin trials that made it famous were run at a minimum of 2.5 g per day, which means several capsules a day. For a brand that wants to launch a single capsule or a gummy, the question is therefore not “collagen or not”, but “which active actually fits in my format”.
The right ingredient for a skin supplement is the one whose studied dose fits your format and whose trials measure what you want to talk about: elasticity, hydration, skin barrier or wrinkles. Collagen peptides, studied in grams, are powder actives. Plant ceramides, hyaluronic acid, elastin peptides and eggshell membrane have been tested at 100 to 450 mg per day, which opens the door to capsules and gummies. And on the label, it is vitamins and minerals, such as vitamin C, biotin or zinc, that carry the authorized claim.
What do skin trials actually measure?
Nutricosmetic studies do not measure “beauty” but specific parameters: elasticity and firmness by suction (Cutometer), hydration of the stratum corneum (Corneometer), barrier function through transepidermal water loss, or TEWL, and wrinkles by imaging. An active can move one without touching the others. In practical terms, if your concept rests on “firmer skin”, look for trials on elasticity; if you are talking about dry skin, look at hydration and TEWL.
Which oral beauty actives, and at what dose?
Collagen peptides: the reference, in grams
It is the best-documented active. In a double-blind trial in 69 women aged 35 to 55, 2.5 g or 5 g of collagen peptides per day for 8 weeks significantly improved skin elasticity versus placebo, at both doses. Hydration, for its part, showed only a trend in subgroup analysis, not significant (Proksch et al., 2014). A second trial from the same group, in 114 women aged 45 to 65 at 2.5 g per day, measured a 20% reduction in eye wrinkle volume after 8 weeks versus placebo (Proksch et al., 2014).
A meta-analysis of 26 randomized trials, totaling 1,721 participants, concludes that hydration and elasticity improve, while noting several biases in the included studies (Pu et al., 2023). On the formulation side, 2.5 g minimum means a stick pack, a powder or a drink.
Plant ceramides: the hydration active for small formats
Ceramides are the lipids that cement the stratum corneum. Taken orally, they are supplied as plant extracts rich in glucosylceramides. The reference trial covers 51 women aged 20 to 63 with dry skin, who took 350 mg of ceramide-rich wheat extract oil for 3 months: hydration measured by corneometry increased significantly on the arms and legs versus placebo, with no significant difference in dermatological scores (Guillou et al., 2011). A more recent trial in 64 women aged 45 to 60, over 12 weeks, also reported a reduction in the crow's feet wrinkle score with this type of extract (Boisnic et al., 2019).
The dose fits in a capsule, but a wheat extract requires the allergen to be declared, and an oily form is easier to work into a softgel than into a gummy.
Elastin peptides: recent data, at a low dose
In a randomized study in 100 Korean adults, 100 mg per day of bonito elastin peptides for 12 weeks improved several fine wrinkle parameters, hydration and the melanin index versus placebo (Seong et al., 2024). It is a promising active for small formats, with two reservations: a single trial of this size, in an Asian population, and a fish origin to declare.
Oral hyaluronic acid: in brief
Hyaluronic acid is used at around 120 mg per day. In a trial in 40 adults aged 35 to 64, this dose for 12 weeks improved wrinkles, stratum corneum hydration, TEWL and elasticity versus placebo (Hsu et al., 2021). Molecular weight and source matter a great deal for this active: we will devote a full article to it.
Antioxidants: vitamin C and carotenoids
Vitamin C plays mainly a regulatory role in a skin formula, since it carries the claim on collagen (see below). Among carotenoids, microalgae-derived astaxanthin is the most studied on skin. A meta-analysis of 9 randomized oral trials concludes that hydration and elasticity improve, but not wrinkle depth (Zhou et al., 2021). The doses studied range from 3 to 6 mg per day (Ng et al., 2020), and its novel food status in the EU governs its conditions of use: check before setting your dosage.
Eggshell membrane: two skin trials, two different forms
Eggshell membrane is known mainly for joints. Its composition, however, speaks directly to the skin: collagen, elastin and hyaluronic acid are naturally found together in it. Two randomized placebo-controlled trials have been published on skin parameters, each on a different eggshell membrane:
- Fresh eggshell membrane, mechanically separated without chemicals, 300 mg per day, 62 women aged 40 to 70, 8 weeks: firmness increased by 44.7% at day 57 versus a 3.8% decrease under placebo, elasticity improved significantly and TEWL was lower than under placebo. The difference in firmness was also significant versus a group receiving 8 g of hydrolyzed bovine collagen. Hydration and wrinkle count did not differ significantly between groups (González-Rodríguez et al., 2026).
- Hydrolyzed eggshell membrane, 450 mg per day, 88 middle-aged adults, 12 weeks: significant improvement in the appearance of crow's feet wrinkles from 4 weeks and in skin tone at 8 weeks, measured by imaging, versus placebo (Kalman and Hewlings, 2020).
Let's be honest: two trials is still not much next to the dozens of studies on collagen, and a trial in around sixty women is not enough to rank the actives against each other. But they are placebo-controlled, they cover firmness and elasticity, and they were obtained at 300 and 450 mg per day. One important clarification: both trials were conducted on other eggshell membranes, not on Reggenerate®.
Beauty actives compared at a glance
| Active | Daily dose studied | Realistic formats | What the cited trials measure | Origin and allergens |
|---|---|---|---|---|
| Collagen peptides | 2.5 to 5 g | Powder, stick pack, drink | Elasticity, eye wrinkles | Bovine, porcine or marine (fish: allergen) |
| Plant ceramides (wheat extract) | 350 mg of extract oil | Softgel, capsule | Hydration, crow's feet wrinkles | Wheat (allergen) |
| Elastin peptides | 100 mg | Capsule, tablet, gummy | Fine wrinkles, hydration, melanin | Fish (allergen) |
| Hyaluronic acid | 120 mg | Capsule, tablet, gummy | Wrinkles, hydration, elasticity | Fermentation or animal origin depending on the source |
| Astaxanthin | 3 to 6 mg | Softgel, capsule | Hydration, elasticity (wrinkles not significant) | Microalgae, novel food status |
| Eggshell membrane (including Reggenerate®, native eggshell membrane) | 300 mg (fresh) to 450 mg (hydrolyzed) | Capsule, tablet, gummy, powder, bar | Firmness, elasticity, barrier (300 mg); appearance of wrinkles and skin tone (450 mg) | Egg (allergen) |
Which active should you choose for your format?
The trials cited last 8 to 12 weeks: the format your consumer will take effortlessly for three months matters as much as the active itself.
Beauty gummy. Frankly, we advise against building a gummy on collagen: at the 2.5 g studied, it would take several gummies a day, and a gummy underdosed relative to the trials weakens your entire pitch. Actives that work at low doses are made for this format: eggshell membrane at 300 mg, hyaluronic acid at 120 mg or elastin peptides at 100 mg, supplemented with biotin or zinc for the claim.
Powder or drink. Here, collagen peptides are in their element, especially if your target already knows the word. Adding 300 mg of eggshell membrane to a collagen stick pack enriches the formula with elastin and hyaluronic acid without changing the format, and vitamin C brings the claim on collagen formation.
Premium capsule. In pharmacies, the buyer reads the ingredient list and asks for the studies. One or two capsules make it possible to combine a firmness active, such as eggshell membrane, with a hydration active, such as plant ceramides, plus vitamin C and zinc: two families of measured parameters, each with its own trials.
What your label can say about skin
None of the functional actives in this comparison has an authorized health claim for skin in the European Union. The studies serve the professional pitch, not the pack.
On the packaging, brands therefore rely on nutrients whose claims are listed in Regulation (EU) No 432/2012, provided the product is at least a source of them within the meaning of Regulation (EC) No 1924/2006. The most widely used in beauty:
- “Vitamin C contributes to normal collagen formation for the normal function of skin.”
- “Biotin contributes to the maintenance of normal skin.” Same wording for zinc, niacin, riboflavin, vitamin A and iodine.
- “Copper contributes to normal skin pigmentation.”
Always check the exact wording and the conditions of use in the EU register of claims before printing: a single changed comma or word can be enough to make a claim non-compliant.
Why we bet on native membrane at 300 mg
At Circul'Egg, we chose to keep the membrane in its native, non-hydrolyzed form, separated from the shell by a 100% mechanical, solvent-free process. The matrix stays as nature built it: type I, V and X collagen, elastin, hyaluronic acid, glucosamine and chondroitin. We recommend it at 300 mg per day, a dose that fits in a capsule or a gummy and that matches the dose of the skin trial on fresh membrane cited above. Once again, that trial covers another eggshell membrane, not Reggenerate®.
Reggenerate®, native eggshell membrane, is developed by Circul'Egg, a company based in Janzé, Brittany, from upcycled eggshells, with ISO and HACCP certifications. If your specifications exclude bovine or marine collagen, our article on vegetarian collagen reviews the options. And if you want to launch fast, our ready-to-market range starts from this same base.
Frequently asked questions
Can collagen and eggshell membrane be combined in the same formula?
Yes, nothing prevents it. In a powder or a drink, 300 mg of eggshell membrane can easily be added to the grams of collagen and brings elastin and hyaluronic acid within the same matrix. Add vitamin C if you want the claim on normal collagen formation.
How long do skin trials last?
The trials cited here last 8 to 12 weeks, sometimes with first differences from 4 weeks. That is an argument for a three-month course, in a format that is easy to take every day.
Can an eggshell membrane food supplement claim an effect on wrinkles?
No. Eggshell membrane has no authorized health claim in Europe, and neither do collagen or hyaluronic acid. Study results are shared with professionals, and the pack relies on authorized nutrients, such as vitamin C, biotin or zinc, in the exact wording of the EU register.