Biotin for Skin and Hair: What the Vitamin Contributes – and How Collagen Plus Pairs It With Vitamin C and Zinc
Biotin is one of the best-known vitamins in the context of skin and hair. But what exactly can be said about it, and why is it combined with vitamin C and zinc in Glow25 Collagen Plus?
This guide shows which statements on biotin are authorised, how the three nutrients work together and what a daily serving of Collagen Plus contains.
Biotin, vitamin C and zinc: the trio in Collagen Plus. Straight to the offer.
Discover Collagen PlusContents
Biotin for skin and hair: what is authorised
Biotin is a water-soluble B vitamin and important for many metabolic processes, including those of proteins, fats and carbohydrates.1 The EU authority EFSA has recognised two statements about biotin as scientifically substantiated:1
- Biotin contributes to the maintenance of normal skin.
- Biotin contributes to the maintenance of normal hair.
For nails, no statement on biotin is authorised.1 That is why we only talk about skin and hair here.
Biotin, vitamin C and zinc: the trio in Collagen Plus in detail
Glow25 Collagen Plus combines bovine collagen hydrolysate with three nutrients that have authorised statements on skin and hair. Tap through:
Biotin: 10 µg per serving
That is 20% of the EU nutrient reference value. Biotin contributes to the maintenance of normal skin and normal hair.1
Vitamin C: 16 mg per serving
Vitamin C contributes to normal collagen formation for the normal function of skin, bones and cartilage.2
Zinc: 2.0 mg per serving
Zinc contributes to the maintenance of normal skin, hair and nails.2
Bovine collagen hydrolysate: 14.9 g per serving
There is no authorised health claim for collagen itself, so we make no statement about it. For when to expect first changes, see our article Collagen and Menopause: Why Your Skin Changes — and What You Can Do About It.
Your Glow25® pack
This offer is only available via our blog – not in the shop.
Collagen Plus with vitamin C, zinc & biotin.
3 months
25%save
£29.99/pack
Regular price: £119.97
Total: £89.97
Save £30Add to cart →- Express shipping from Germany
- 60-day money-back guarantee
2 months
12%save
£35.19/pack
Regular price: £79.98
Total: £70.38
Save £9.60Add to cart →- Express shipping from Germany
- 60-day money-back guarantee
Recommended intake: stir one serving of 15 g powder (= one level measuring spoon) into 200 ml of a warm or cold drink daily. Do not exceed the recommended daily intake. Food supplements are not a substitute for a balanced and varied diet and a healthy lifestyle. Keep out of the reach of young children. Not suitable for children and teenagers. Note: if you have a lab test coming up, tell your doctor or the laboratory that you take biotin.
Biotin in everyday life: foods that provide it
Biotin is in many foods. According to the German Federal Institute for Risk Assessment (BfR), good sources include:1
- Liver and kidney
- Oats
- Soybeans and lentils
- Mushrooms
- Eggs, especially the yolk
- Milk and dairy
For more everyday ideas around hair, see How Hormones and Your Gut Both Decide Whether You Lose Your Hair.
Biotin FAQ
What is biotin?
Biotin, also called vitamin B7, is a water-soluble B vitamin. It is an important helper (coenzyme) for many enzymes and is involved in the metabolism of fatty acids, proteins and carbohydrates.
What can be said about biotin for skin and hair?
Two statements are authorised: biotin contributes to the maintenance of normal skin, and biotin contributes to the maintenance of normal hair. For nails, no statement on biotin is authorised.
How much biotin is in Glow25 Collagen Plus?
A daily serving (15 g) contains 10 µg of biotin. That is 20% of the EU nutrient reference value. It also provides 16 mg vitamin C and 2.0 mg zinc.
What role do vitamin C and zinc play?
Vitamin C contributes to normal collagen formation for the normal function of skin, bones and cartilage. Zinc contributes to the maintenance of normal skin, hair and nails.
Does biotin help with hair loss?
We make no statement about that. It is authorised that biotin contributes to the maintenance of normal hair. For hair loss, have the cause checked by a doctor.
Which foods contain biotin?
Good sources are liver and kidney, oats, soybeans and lentils, mushrooms and eggs, especially the yolk. Milk and dairy also contribute to supply.
How do I take Collagen Plus?
Stir one level measuring spoon (15 g) of powder into 200 ml of a warm or cold drink daily. Do not exceed the recommended daily intake.
The bottom line: a trio for skin and hair
Biotin contributes to the maintenance of normal skin and normal hair. In Glow25 Collagen Plus it meets vitamin C and zinc, which also have authorised statements on skin and hair, combined with bovine collagen hydrolysate.
Want to add biotin, vitamin C and zinc to your routine?
View Collagen Plus- German Federal Institute for Risk Assessment (BfR), 21 May 2026: Biotin: Supplemente können Laboruntersuchungen verfälschen (FAQ, in German). Official information, not a single study. bfr.bund.de
- Authorised health claims under Regulation (EU) No 432/2012 (vitamin C, zinc).
This article does not replace medical advice. For hair loss or other symptoms, please speak to your doctor.
