Lysine
Function
Lysine is one of nine essential amino acids in humans required for growth and tissue repair, Upon oral intake, L-lysine promotes healthy tissue function, growth and healing and improves the immune system.

Food sources
Lysine is mostly found in
- Red meat
- Fish
- Dairy products
Deficiency
Lysine deficiency results in following issues
- Tiredness
- Retarded growth
- Inability to concentrate
- Hair loss
- Irritability
- Anemia
- Bloodshot eyes
- Reproductive problems
Source: National Center for Biotechnology Information; 2004-. PubChem Compound Summary for CID 5962, Lysine; (cited 2021 Apr. 8)
https://pubchem.ncbi.nlm.nih.gov/compound/Lysine