| Customization: | Available |
|---|---|
| Powder: | Yes |
| Customized: | Customized |
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L-cystine was discovered in 1810 by Wollaston from bladder stones. In 1832, Berzelius named it cystine. It is a sulfur-containing amino acid, which is contained in a small amount in protein, and is mostly contained in keratin such as hair and finger paws.
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