Certain muscle groups observed in murine models, including the rectus abdominis, psoas major , and paraspinal muscles, showed a more pronounced increase in muscle density and volume, as well as a reduction in intramuscular fat content, than those observed in controls
However, there is little to no evidence to support these claims
doi:10.1002/dta.1715
You get it almost entirely from animal foods: meat, poultry, fish, eggs, and dairy
Light and heat can degrade the vitamin over time, reducing its potency
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