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VITAMIN B12 FOR YOUR HEALTH BENEFITS OF B12 HAIR, SKIN & NAILS With age you loose collagen in your skin and can end up with brittle nails

doi: 10.1016/j.phymed.2024.155700 64 ZhaoYPanBLvXChenCLiKWangYet al

This is part of why B12 has a strong safety record, and it is also why levels sometimes need regular replenishment during active treatment

10.1104/pp.107.114066 Plant Physiol

[DOI] [PMC free article] [PubMed] [Google Scholar] 173.Zhang H., Du Y., Zhang X., Lu J., Holmgren A

Nonetheless LRP5 and LRP6 are partially redundant as their functions together are required for mouse gastrulation (He et al., 2004)