'''Vitamin B<sub>7</sub>''', also called '''biotin''', is an '''essential water-soluble vitamin'''. Biotin is actively transported across the intestinal mucosa, with minimal passive [[Diffusion - Physiology|diffusion]], and is typically found as free biotin in [[plasma]]. '''Biotin is not stored in the body and is freely filtered by the [[Nephron Microscopic Anatomy#Proximal Tubule|renal tubules]]'''.
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'''Vitamin B<sub>7</sub>''', also called '''biotin''', is an '''[[Nutrition Glossary#Essential Nutrients|essential]] water-soluble vitamin'''. Biotin is actively transported across the intestinal mucosa, with minimal passive [[Diffusion - Physiology|diffusion]], and is typically found as free biotin in [[plasma]]. '''Biotin is not stored in the body and is freely filtered by the [[Nephron Microscopic Anatomy#Proximal Tubule|renal tubules]]'''.