By Ryan Harris, Ingredient Content Specialist

The bottom line: Yüth® is a nature-identical spermidine that adds a cellular-renewal layer to beauty-from-within formulas, supporting the renewal that hair and skin are built on at a 3mg dose that leaves room in the gummy, chew, capsule or drink for other actives. Biotin and hyaluronic acid do targeted jobs alongside it, supporting keratin production and skin hydration. Biotin, hyaluronic acid and spermidine are not interchangeable, and the best beauty formulas increasingly contain both targeted actives and actives that support the cell as a whole. Yüth® is already formulated into mainstream beauty products at national retail.

In one sentence: Yüth® adds a cellular-renewal layer to beauty-from-within formulas that biotin and hyaluronic acid, which act on keratin and hydration, were never designed to cover.

Best for:

• Yüth®: cellular renewal and healthy-aging across hair, skin and nails. Beauty waters, collagen blends, longevity nutrition, gummies and topicals. Brands that need a beauty story with a longevity mechanism behind it.
• Biotin: keratin support and instant consumer recognition on a label.
• Hyaluronic acid: skin hydration, moisture retention and wrinkle appearance.

Main difference: Beauty and longevity have merged into one conversation. Biotin feeds keratin production. Hyaluronic acid holds water in the skin. Yüth® spermidine supports autophagy, the renewal process that keeps the cells building hair and skin in the first place.

What is beauty-from-within?

Beauty-from-within is the practice of supporting hair, skin and nails through ingestible nutrition and supplementation instead of topical products alone. Hair and skin are built by cells, those cells are fed by the nutrients the body takes in, and a topical serum can only reach so far to get at root causes.

Collagen, biotin, hyaluronic acid, vitamin C and astaxanthin have carried the category for years and still dominate new launches.

Beauty-from-within messaging has shifted from anti-aging toward improving health span, framing outer beauty as a reflection of healthspan rather than a fix applied later. Longevity-leaning ingredients are moving into formulas that used to be built entirely from familiar beauty actives.

The beauty category is going cellular, and Yüth® is already on that shelf. In February 2026, Lemme and Kylie Cosmetics launched Skin Glaze Gummies nationwide into Ulta Beauty, a pomegranate-flavored beauty gummy formulated with Yüth® spermidine alongside pro-retinol and pro-collagen vitamins and a superfruit complex, positioned around skin barrier health and normal cell turnover. A mainstream beauty gummy at national retail is a useful signal of where the category is heading; spermidine has moved past the longevity aisle.

Why do formulators pair beauty ingredients with cellular-health ingredients?

Because cellular ingredients are the foundation of a beauty formula and targeted beauty ingredients build on that foundation, so a formula carrying both cellular and targeted ingredients covers more of the goals consumers are after than either does alone.

Consumers already recognize biotin and hyaluronic acid, which makes them reliable anchors on a label. The problem is differentiation. When every hair-skin-nails gummy on the shelf runs 2,500mcg of biotin, the ingredient stops being a reason to choose one product over another. Adding a cellular layer gives a brand a mechanism to talk about and a claim its competitors have not already made.

It also matches how the buyer thinks. Beauty and longevity have merged into one conversation, and shoppers reaching for a collagen powder are often reaching for the same reasons they reach for a longevity supplement. A formula that answers both keeps its relevance longer than one built on a single trend.

How does spermidine connect to hair, skin and nail support?

Hair, skin and nails renew faster than almost any tissue in the body, which makes them unusually dependent on the cellular renewal spermidine supports.

Spermidine is a polyamine found in every living cell and one of the few dietary molecules known to trigger autophagy, the process cells use to clear out worn parts and rebuild. Spermidine levels fall with age, and the research on the beauty side points in a consistent direction:

• Hair: in a 90-day placebo-controlled study in 100 healthy adults, a spermidine-based supplement significantly increased the number of hair follicles in the active growth phase compared with placebo.
• Skin: research published in Communications Biology links spermidine to lipid and collagen synthesis and to a stronger skin barrier, and shows it activates genes tied to skin improvement.
• Nails: in a human clinical trial conducted by Eurofins in 2024, nail growth increased significantly along with improvement in self-reported hair growth in subjects taking Yüth®.

None of this is a treatment claim, and spermidine does not fix hair loss. The mechanism is upstream. Support the cell, and the tissue that cell builds has more to work with. That is beauty on a cellular level, and Yüth® is the form that carries it into a real formula.

What does Yüth® add that biotin and hyaluronic acid do not?

Yüth® adds a renewal mechanism rather than a structural input, delivered at a dose small enough to layer on top of what a formula already contains.

Both biotin and hyaluronic acid deserve their due, and neither is going anywhere.

Biotin is the B vitamin cofactor behind keratin synthesis, the structural protein in hair and nails, and biotin deficiency does cause hair loss. Plus, consumers know the name, which is worth real money on a label. The honest consideration is what happens in people who are not deficient. A review of the evidence found no studies demonstrating that biotin supplementation benefits hair growth in healthy individuals, and deficiency is rare in the United States because a normal diet covers the 30mcg adults need. High doses also interfere with laboratory immunoassays, which is a practical consideration worth knowing. Biotin earns its place as an anchor, but it does not carry a healthy-aging mechanism.

Hyaluronic acid (HA) has better clinical support than its reputation suggests. In a 12-week placebo-controlled trial, 120mg per day of oral HA significantly improved wrinkle assessment, stratum corneum water content and skin elasticity. It works, and it works on hydration and skin structure specifically. At 60 to 120mg, the HA dose does take up significant space in a gummy though. Its effect stays where its mechanism sits, which is moisture and the appearance of the skin surface.

Yüth® works on a different pathway entirely. Autophagy and cellular renewal are the foundation underneath hair, skin and nails together instead of targeting one output, which is why the same ingredient supports a healthy-aging claim and a beauty claim at once. At 3mg, tasteless and dissolving clearly in water, it adds that layer without crowding the collagen or the biotin already in the formula, and Yüth® can be added to all dosage forms. Yüth® is a low-dose, nature-identical, self-affirmed GRAS, made-in-the-USA spermidine, and no other beauty active on the shelf today is positioned to make that claim.

Yes, and that is the intended use. Yüth® is best used in combination rather than as a replacement for the beauty actives a brand already sells.

Collagen remains the anchor of the category, and a collagen powder has room for a 3mg addition without any reformulation drama. Because Yüth® is tasteless, odorless, stable in heat and dissolves clearly in water, it goes into formats that have issues with other actives. Common beauty pairings follow a consistent pattern:

• Yüth® plus collagen
• Yüth® plus biotin and hydration electrolytes
• Yüth® plus astaxanthin and biotin for hair-skin-nails
• Yüth® plus CoreBiome® and astaxanthin
• Yüth® plus amla extract and selenium

The clean-label profile helps here too. Yüth® is allergen-free, non-GMO and made in the USA, so it does not carry the wheat allergen that comes with wheat germ spermidine.

FAQ

Is Yüth® a beauty ingredient?

Yes. Yüth® is a nature-identical spermidine developed for healthy aging along with hair, skin and nails, which puts it in beauty-from-within formulas as a cellular-renewal ingredient rather than a targeted beauty active.

Is Yüth® a longevity ingredient?

Yes. Beauty and longevity have merged into one conversation, and shoppers reaching for a collagen powder are often reaching for a longevity supplement like spermidine at the same time.

Can Yüth® be combined with biotin or collagen?

Yes. Yüth® works at 3mg and is tasteless and neutral in formulation, so it layers into existing collagen powders, biotin gummies and beauty waters without displacing what is already there.

What makes Yüth® different from hyaluronic acid?

Hyaluronic acid supports skin hydration and moisture retention at doses of 60 to 120mg. Yüth® spermidine supports autophagy and cellular renewal, so the two act on different mechanisms and fit together rather than compete.

Is Yüth® good for hair, skin and nails?

Yes. Yüth® is formulated for hair, skin and nails. Spermidine research includes a 90-day placebo-controlled study that reported increased hair follicles in the active growth phase, along with skin research linking spermidine to collagen synthesis and improved skin barrier.

Why should Yüth® be used in beauty-from-within formulas?

Beauty-from-within has moved toward cellular and age-agnostic positioning, and Yüth® gives a brand a spermidine mechanism behind that story at a dose that fits gummies, powders, RTDs and topicals. It is already formulated into mainstream beauty products at national retail, including the Lemme and Kylie Cosmetics Skin Glaze Gummies that launched into Ulta Beauty in February 2026.

Does Yüth® replace biotin in a formula?

No. Biotin supports keratin production and carries strong consumer recognition. Yüth® supports the renewal process beneath it, which is why the two are often formulated together.

What dose of Yüth® goes into a beauty formula?

Yüth® is active at 3mg, low enough to add to a collagen blend, a beauty water or a gummy without reworking the rest of the formula.

Is Yüth® allergen-free?

Yes. Yüth® is allergen-free, non-GMO, self-affirmed GRAS and made in the USA, which separates it from wheat germ spermidine in formulas where the wheat allergen is a problem or a large dose is a problem. Wheat germ spermidine is difficult to fit in a gummy when it takes up to 1,000mg of total material.

Build a beauty formula with Yüth®

For formulators and brands working on their next beauty-from-within product, reach out to us at sales@compoundsolutions.com to learn more about Yüth® spermidine, how to formulate with it in your project and explore the studies behind it.