Potencies range from about 300 mcg up to 10,000 mcg per softgel. Common amounts you’ll see are 300 mcg, 1,000 mcg, 5,000 mcg and 10,000 mcg.
Formulations often pair biotin with other vitamins (for example B vitamins, A, C, and E) and beauty-support ingredients such as hyaluronic acid, argan oil and nutrient complexes containing arginine, silicon or inositol.
Typical directions advise adults to take one softgel daily with water and a meal. Many labels also recommend consulting a physician before use and caution against exceeding the stated dose unless directed by a healthcare professional.
Labels commonly advise consulting a physician for medical conditions and note that biotin can interfere with certain lab tests. Many labels also caution pregnant or nursing individuals and those taking medications to consult a healthcare professional, and to avoid exceeding the recommended daily dose.
Common verifications include manufacture in GMP/cGMP-certified facilities and third-party testing or verification (some listings also note USP verification of ingredients and potency).
Some softgels use carrier oils such as organic cold-pressed coconut oil to aid absorption, and capsule materials may include gelatin (for example halal gelatin) depending on the product.