NOW Foods Biotin 1000 mcg provides this essential B-vitamin at a clinically studied dose for supporting healthy hair, skin, and nail growth, as well as carbohydrate, fat, and protein metabolism. Biotin (vitamin B7) is a coenzyme required by carboxylase enzymes involved in fatty acid synthesis, gluconeogenesis, and amino acid metabolism — making it essential for cellular energy production at a fundamental level. Biotin deficiency, though uncommon, is associated with hair thinning, brittle nails, and skin rashes. Supplementation at 1,000 mcg is a widely used starting point for those seeking to support hair and nail health. NOW Foods delivers pure biotin without artificial additives in a vegetarian capsule, manufactured in their GMP-certified facility with batch potency testing. A clean, affordable foundation for daily hair and metabolic health support.