Amino Acids - Cysteine or Cystine - Optimal Absorption

Cysteine is more soluble than cystine, with L-cysteine being the most absorbable form. If supplementing, take 500mg three times daily. This dosage can go as high as 1,000mg three times daily for one month at a time. NOTE: High levels of L-cysteine supplementation should be for acute situations only and you must be under the supervision of your naturopath or other health practitioner.

NAC supplementation is considered extremely safe. Dosage can range from 500 to 1,200mg daily, with 600mg being a typical dosage.

Vitamin E and selenium work well with cysteine's antioxidant actions. Vitamin B₆ is necessary for cysteine synthesis. Ensure your intake is adequate and supplement as required.