No.01
Biotin
D-Biotin
Why this matters
- № 01Essential for keratin production - the protein that makes up hair and nails*
- № 02Supports healthy hair follicle function*
- № 03Promotes nail strength and thickness*
The Library · Vol. 01Entry No. 42· Chapter 06
Biotin
Vitamin B7
Also known as Vitamin B7 or Vitamin H, Biotin is essential for the metabolism of fats, carbohydrates, and proteins. It's the most important vitamin for healthy hair, skin, and nails.
1
Active compounds
3
In our products
1
Clinical citations
06
Glow & Skin
Vitamin B7Botanical illustration
§ 1The molecules
Active compounds.
*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
§ 2Receipts
What the research shows.
“Biotin (Vitamin B7) plays a role in protein metabolism and keratin production. While biotin deficiency can cause hair and nail problems, deficiency is uncommon in healthy individuals. Supplementation provides comprehensive B-vitamin support for hair, skin, and nail health.”Skin Appendage Disorders, 2017
From the Library · Vol. 01
Know exactly what
you're taking.
Every compound in your stack — sourced, dosed, and cited. No proprietary blends. Browse the science behind the bottles.
118Ingredients
180Compounds
14Chapters
Browse by chapter
Support for hair, skin, and nails — taken internally.Showing 4 of 4 · View all
We publish every dose, every source, every paper we leaned on. An informed customer is our only kind.
Browse the full libraryFrom the Journal
Keep reading.
Journal · collagen
Apr 10, 2026
The Complete Collagen Guide: Types, Formats, Timing, and Whether It Actually Works
Collagen is the most abundant protein in your body and the most searched supplement category after protein powder. When you ingest hydrolyzed collagen, you're not depositing intact molecules into your skin — the molecule is far too large. What happens is more interesting: specific peptide fragments survive digestion, accumulate in the dermis, and serve as signaling molecules that upregulate your body's own collagen production. This guide maps the mechanism, evaluates the evidence, and explains why format and timing determine whether supplementation works or wastes your money.
Read article→
Journal · hair-loss
Apr 10, 2026
The Supplement Guide for Hair Loss That's Actually Honest
Hair loss content falls into two categories: 'this miracle supplement regrows everything' and 'nothing works, see a dermatologist.' The truth is between them. Some supplements have evidence for specific types of hair loss — nutritional deficiency and stress-induced shedding respond well. Pattern hair loss requires medical intervention. None of them are miracle cures. Here's the honest version, with the type-specific framework that determines whether supplementation is the right tool.
Read article→
— End of entry
Put Biotin to work.
Browse the products it’s in, or build a stack around the goal it serves best.