| 1 | It also lowers blood levels of homocysteine. | |
| 2 | Ten to 15 years ago human hair was a main source of L-cysteine. | |
| 3 | Eggs contain cysteine, sulfur, lecithin, amino acids and lutein. | |
| 4 | High levels of homocysteine have been linked to a greater risk of Alzheimer's. | |
| 5 | Elderly people with higher levels of homocysteine, had higher levels of brain shrinkage. |