NutriStack
Symptom·Appearance·Reviewed May 30, 2026
Supplements for Ridged or slow-growing nails.
When ridged or slow-growing nails is the complaint, these are the supplements most often associated with it in the NutriStack library, ranked by how directly each one targets it and by the strength of the evidence.
Ranked by relevance, top first.
Relevance reflects how directly each supplement targets this symptom in the NutriStack map. Evidence is the supplement’s own rating. Open any name for the full profile.
- 01Vitamin B7Moderate78% match
Biotin supports keratin production and has the best supplement evidence for thickening brittle, splitting nails.
SuggestedBiotin (2.5 mg) capsule - 02IronModerate74% match
Iron deficiency can cause brittle, ridged, or spoon-shaped (koilonychia) nails and slow growth.
SuggestedIron bisglycinate - 03ZincLimited66% match
Zinc is needed for nail matrix protein synthesis, and deficiency can cause white spots, ridging, and slow growth.
SuggestedZinc bisglycinate (with food) - 04Collagen PeptidesLimited60% match
Hydrolyzed collagen may improve nail growth rate and reduce brittleness in small trials by supplying amino acids used in nail formation.
SuggestedHydrolyzed collagen peptides powder - 05SiliconLimited55% match
Bioavailable silicon may support connective tissue and nail strength, with limited supporting data.
SuggestedOrthosilicic acid (choline-stabilized)
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These rankings come from the same library that powers the NutriStack app. Open any supplement for full dosing, forms, interactions, and citations.