Best Hair, Skin and Nails Supplements 2026: Collagen, Serums and More Compared

Thinning hair, fine lines, brittle or discolored nails: the beauty aisle promises a fix for each of them, and more and more of it is sold online as a supplement or a serum. Some products work from the inside, like collagen powders and hair vitamins, and others are applied directly to the scalp, skin or nails. In this guide we compare five products listed in the Vitarrow United States catalog: Collagen Refresh, FullyVital Hair Serum, Liposomal Hair Renewal, Kerassentials and Idrotherapy. For each one we look at what the brand publishes about ingredients, how you use it, the listed price where available and the money-back guarantee. Vitarrow has not tested these products, and nothing here is a dermatology assessment. If you are losing hair quickly or in patches, or a nail is painful, swollen or changing shape, see a doctor or a dermatologist first, because thyroid problems, low iron, infections and some medicines can be the real cause.

How we picked these products

Every product below is listed in Vitarrow’s hair, skin and nails catalog and has its own page with data read from the brand’s sales page. We chose formulas whose sellers publish at least some ingredient, serving or guarantee information. Vitarrow does not test products, so nothing here is a lab result, a clinical evaluation or a verified customer rating. Read more in how we rate.

Ingredients you will see again and again

• Collagen peptides: studied in a number of small trials for skin elasticity and hydration, with encouraging but not conclusive results.
• Biotin: essential for hair and nails, but extra biotin helps mainly people who are deficient. High doses can also distort some lab tests, including thyroid and heart tests, so tell your doctor you take it.
• Hyaluronic acid and vitamins C and E: common in serums for hydration and antioxidant support.
• Tea tree oil and undecylenic acid: used on the skin for their antifungal properties.

Collagen Refresh

Collagen Refresh is a powder taken as one scoop a day, with 30 servings per bottle. The brand pitches it for fine lines and wrinkles, nail growth and joint comfort.

The sales page we read did not show the full Supplement Facts, so check the collagen type and amount on the label. The brand says it is made in a GMP, FDA-registered facility, and the seller offers a 180-day money-back guarantee.

What the brand says it supports:

• Smoother-looking skin
• Stronger nails
• Joint comfort and bone density

Brand claims read from the sales page, as listed on Vitarrow; not verified by Vitarrow.

See Collagen Refresh on Vitarrow →

FullyVital Hair Serum

FullyVital is a serum applied to the scalp rather than a pill. Its listed ingredients include copper, ginseng, collagen, melatonin, biotin, hyaluronic acid, niacin and zinc.

The brand says it targets five causes of thinning hair at once and describes it as doctor formulated and third-party tested. The seller offers a 180-day money-back guarantee.

What the brand says it supports:

• Thicker, fuller-looking hair
• A healthy scalp

Brand claims read from the sales page, as listed on Vitarrow; not verified by Vitarrow.

See FullyVital Hair Serum on Vitarrow →

Liposomal Hair Renewal

Liposomal Hair Renewal is a hair supplement that uses liposomes, tiny fat bubbles the brand says improve how the body absorbs the nutrients. The sales page we read did not list the full formula.

It is listed at $53.95 for one bottle, $44.95 each for three and $39 each for six, with a bottle listed as a one-month supply. The brand lists it as non-GMO and gluten free, and the seller offers a 180-day money-back guarantee.

What the brand says it supports:

• Less visible thinning
• Thicker, fuller-looking hair

Brand claims read from the sales page, as listed on Vitarrow; not verified by Vitarrow.

See Liposomal Hair Renewal on Vitarrow →

Kerassentials

Kerassentials is a topical oil for the nails and the skin around them. Its listed ingredients include tea tree oil, clove, aloe vera, flaxseed and chia oils, vitamin E and undecylenic acid.

The brand pitches it for nail keratin and skin health. The seller offers a 60-day money-back guarantee. A thick, yellow or crumbling nail may be a fungal infection, which a doctor can confirm and treat.

What the brand says it supports:

• Healthy-looking nails
• Skin around the nails

Brand claims read from the sales page, as listed on Vitarrow; not verified by Vitarrow.

See Kerassentials on Vitarrow →

Idrotherapy

Idrotherapy is a topical skin product aimed at firmness, wrinkles, hydration and texture. The sales page we read did not list the full ingredients.

It is listed at $50 for one bottle, $33 each for three and $24.83 each for six, the lowest per-bottle price in this group. The sales page we read did not state a guarantee length, so check the refund terms first.

What the brand says it supports:

• Firmer-looking skin
• Hydration
• Smoother texture

Brand claims read from the sales page, as listed on Vitarrow; not verified by Vitarrow.

See Idrotherapy on Vitarrow →

How to choose

• Find the cause first. A blood test for iron, thyroid and vitamin D can explain hair loss that no serum will fix.
• Patch test topicals. Apply a small amount on the inside of your arm for a day before using a new serum or oil.
• Give it time. Hair and nails grow slowly, so most brands suggest several months; note the guarantee length.
• Pregnant or nursing? Ask your doctor before starting supplements or serums with active ingredients.

Conclusion

If you want to work from the inside, Collagen Refresh is the collagen option and Liposomal Hair Renewal is the hair-focused supplement. FullyVital is the pick for a scalp serum with a detailed label, Kerassentials is for nails, and Idrotherapy is the lowest-priced skin product per bottle. Whatever you choose, sunscreen, sleep, enough protein and not smoking do more for hair and skin than any single product.

Want to compare other concerns too? Browse the full Vitarrow United States catalog →