Emerging evidencemineral
Manganese for Brittle Nails
Cofactor for prolidase in collagen synthesis. Required for mucopolysaccharide formation in nail matrix.
How strong is the research?
Emerging evidence
Based on expert consensus — less direct research, but informed by clinical experience.
Research source
Micronutrient deficiencies and nail health: clinical observations · 2015How much to take
2–5 mg
Combine with biotin and silicon for best results. Effects visible after 2-3 months.