Biotin
Also known as: Vitamin B7, Vitamin H, D-Biotin
A B-vitamin essential for fat and glucose metabolism — widely supplemented for hair, skin, and nail health.
What it is
Biotin (vitamin B7) is a water-soluble B-vitamin that serves as a coenzyme for five carboxylase enzymes involved in fatty acid synthesis, gluconeogenesis, and amino acid catabolism. It is naturally found in eggs, organ meats, and nuts. Deficiency is rare in healthy adults but can occur with raw egg white consumption (avidin protein binds biotin) or in individuals with biotinidase deficiency.
How it works
Biotin-dependent enzymes are central to energy metabolism: acetyl-CoA carboxylase initiates fatty acid synthesis, pyruvate carboxylase supports gluconeogenesis, and propionyl-CoA carboxylase handles branched-chain amino acid catabolism. Biotin also influences gene expression through its attachment to histones (chromatin-bound proteins that regulate DNA accessibility).
Clinical dose range
30–10,000 mcg/day depending on purpose
RDA (AI): 30 mcg/day. Most commercial 'hair, skin, and nail' supplements use 1,000–10,000 mcg/day. Note: high-dose biotin (≥2,500 mcg) interferes with many laboratory tests including thyroid panels, troponin (cardiac marker), and hormone assays — inform your physician before testing.
Forms comparison
What to look for on the label
- Specifies D-Biotin (the active isomer)
- Third-party tested for dose accuracy
- Avoid products with unnecessary fillers when used therapeutically
- Be aware of lab test interference at doses above 2,500 mcg
Health goals supported
Safety & dosing notes
No established UL — biotin has an excellent safety profile. Critical note: doses ≥1,000 mcg interfere with immunoassay-based laboratory tests (thyroid, cardiac, reproductive hormone panels). Discontinue 3–7 days before any blood tests.
SuppsBuddy validates that products use D-Biotin and flags potentially excessive doses (above 5,000 mcg) where clinical need is unclear. The lab test interference warning is a key educational note in SuppsBuddy's biotin analysis.
Frequently asked questions
What is Biotin?
Biotin (vitamin B7) is a water-soluble B-vitamin that serves as a coenzyme for five carboxylase enzymes involved in fatty acid synthesis, gluconeogenesis, and amino acid catabolism. It is naturally found in eggs, organ meats, and nuts. Deficiency is rare in healthy adults but can occur with raw egg white consumption (avidin protein binds biotin) or in individuals with biotinidase deficiency.
How does Biotin work?
Biotin-dependent enzymes are central to energy metabolism: acetyl-CoA carboxylase initiates fatty acid synthesis, pyruvate carboxylase supports gluconeogenesis, and propionyl-CoA carboxylase handles branched-chain amino acid catabolism. Biotin also influences gene expression through its attachment to histones (chromatin-bound proteins that regulate DNA accessibility).
What is the typical clinical dose range for Biotin?
30–10,000 mcg/day depending on purpose. RDA (AI): 30 mcg/day. Most commercial 'hair, skin, and nail' supplements use 1,000–10,000 mcg/day. Note: high-dose biotin (≥2,500 mcg) interferes with many laboratory tests including thyroid panels, troponin (cardiac marker), and hormone assays — inform your physician before testing.
What forms of Biotin should I look for?
D-Biotin: The naturally occurring, biologically active form — the only form that functions in the body | D-Biotin in any delivery format: No meaningful differences between delivery forms for biotin specifically
Is Biotin safe?
No established UL — biotin has an excellent safety profile. Critical note: doses ≥1,000 mcg interfere with immunoassay-based laboratory tests (thyroid, cardiac, reproductive hormone panels). Discontinue 3–7 days before any blood tests. This information is educational and is not medical advice.
How does SuppsBuddy evaluate Biotin?
SuppsBuddy validates that products use D-Biotin and flags potentially excessive doses (above 5,000 mcg) where clinical need is unclear. The lab test interference warning is a key educational note in SuppsBuddy's biotin analysis.
Related ingredients
This page is for educational purposes only. These statements have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before starting any supplement.