Essential Concepts: Lysine is an essential amino acid the body cannot make, so it must come from food or supplements. It supports protein synthesis, collagen, calcium absorption, muscle repair, and may help reduce herpes outbreaks, bone loss, and anxiety.
Vitamin C supports collagen production, immune function, iron absorption, and protection against oxidative stress, with some evidence linking adequate intake to lower risk of cardiovascular disease and certain eye conditions. Most adults can meet their needs through diet, though people with low intake, smokers, and pregnant women should consider medical guidance.
Essential Concepts: collagen, immunity, iron absorption, antioxidant support, possible heart and eye benefits, diet first, higher-risk groups need advice
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