Biotin (Vitamin B7) is the most marketed nutrient for hair health, and Gelagen delivers it at 5000mcg — the dose most commonly used in supplementation studies. But does the research support the marketing? Let us walk through the evidence honestly.
Biotin plays a role in keratin production, the structural protein that forms hair, skin and nails. It acts as a cofactor for carboxylase enzymes involved in amino acid metabolism essential for keratin synthesis.
Several clinical studies demonstrate improvements in hair thickness and reduced shedding with biotin supplementation at 2500–5000mcg daily. However, most studies are small (under 100 participants), some lack placebo controls, and the strongest evidence exists for people with pre-existing biotin deficiency.
Biotin deficiency clearly causes hair loss, and supplementation reverses it. For people with adequate biotin levels, the evidence for additional supplementation is less definitive but still promising based on available data.
Hair grows approximately 1cm per month. Even if biotin immediately improves the quality of new hair growth, visible differences in length and thickness require 2–3 months of consistent use.
At 5000mcg, biotin can interfere with certain laboratory tests. The FDA has issued a safety communication about this. Always inform your doctor.