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Collagen peptides, when ingested, are broken down into smaller fragments that serve as both building blocks for new collagen synthesis and as signaling molecules that stimulate fibroblasts to produce more collagen
But it's unclear whether B vitamins have any added benefits for people with normal blood levels
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NAD and energy metabolism : Shown to increase intracellular NAD levels by up to 1.6-fold, supporting mitochondrial function and cellular energy production
Hepatology 64 (2), 488500
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