Incidence and Clinical Characteristics of Thyroid Cancer in Prospective Series of Individuals with Cowden and Cowden-Like Syndrome Characterized by Germline PTEN, SDH, or KLLN Alterations
**** READ THIS!!!*** Cysteine | Toxic forms of cysteine that should be avoided include: D-cysteine D-cystine 5-methyl cysteine NAC may raise levels of homocysteine, an amino acid that is associated with heart disease. Be sure to have your doctor check your homocysteine level if you are taking NAC. Very high doses (more than 7 grams) of cysteine may be toxic to human cells and may even lead to death.
The therapeutic dosage of NAC to improve insulin levels based on the published studies is 1.6-3 grams/day. If you are overweight, you may benefit from the higher end of the dose range. Fulghesu et al found that obese patients with PCOS did not respond to doses under 3 grams/day. You should not exceed 7grams/daily. As with any nutrition supplement, it is important to discuss use with your physician before taking.