Identity and form
Keratin is a structural protein, commonly sourced from wool, feathers, or other animal material; hydrolysis and peptide-size distribution matter.
The label should identify the source, form, preparation, and active or marker amount when those details determine comparability.
What the evidence can answer
Human research has examined Keratin in relation to skin, hair, and nail structure, connective-tissue structure. The amount, source, preparation, population, comparator, and measured outcome determine whether a result applies to a finished product.
Current WQ evidence label: Limited human evidence. This label describes the present evidence context, not a promise of benefit.
Safety and decision context
Use-context caution. Source species, processing, contaminants, and dietary suitability must be declared. Source-specific allergy and cross-contact need label review.
Review medicines, pregnancy or breastfeeding, allergies, medical history, and the complete finished label with a qualified professional when relevant.
How WQ connects this entry
WQ links this canonical identity to exact aliases, research topics, related ingredient forms, products with matching structured data, and articles that name the same entity. Related does not mean equivalent or recommended.
