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. 2020 Aug 24;64(4):607–647. doi: 10.1042/EBC20190041

Figure 14. The categorisation of amino acids into their essential, conditional and non-essential groups in humans.

Figure 14

Conditional amino acids are not usually essential amino acids, only in times of illness and stress. Essential amino acids are not produced naturally by the body and must come from dietary intake whereas non-essential amino acids are produced by our body.