Cysteine
Cysteine is a sulphur-containing amino acid, like methionine. Cysteine is usually a non-essential amino acid, since it can be synthesized by the human body from methionine, so some requirements are expressed in terms of the sum of cysteine and methionine. However, it might be essential for some people (infants notably), which makes it a semi-essential proteinogenic amino acid. Among other uses, it is a food additive (E920) used for flavouring.
Foods rich in it (in quantity per 100 g)
- Spices, mustard seed (1 g)
- Seeds, hemp seed (1 g)
- Seaweed, spirulina (1 g)
- Leavening agents, yeast (1 g)
- Nuts, walnuts (0 g)
- Seeds, sunflower seed kernels (0 g)
- Oats (0 g)
- Seeds, chia seeds (0 g)
- Spices, fenugreek seed (0 g)
- Semolina, unenriched (0 g)
- Seeds, sesame seeds (0 g)
- Seeds, sesame butter (0 g)
- Seeds, flaxseed (0 g)
- Peanuts, all types (0 g)
- Spelt, uncooked (0 g)
- Seeds, pumpkin and squash seed kernels (0 g)
- Lentils, pink or red (0 g)
- Wheat, KAMUT khorasan (0 g)
- Nuts, pistachio nuts (0 g)
- Spices, poppy seed (0 g)
