Lamberts® N-Acetyl Cysteine (NAC) is a one-a-day formula that provides a full 600mg of NAC. NAC is an altered form of the amino acid L-Cysteine and is one of the few amino acids to contain sulphur. As a consequence, NAC has a strong sulphur like odour, which is completely normal. NAC increases the amount of a substance called glutathione in the body. Directions: Take one capsule daily with a meal or as directed by a practitioner or pharmacist. Do not exceed daily recommended dose. Each capsule delivers: N-Acetyl Cysteine (NAC) - 600mg Encapsulated With: Capsule shell (Hydroxypropyl Methylcellulose) Silicon dioxide, Magnesium Stearate, Rice Flour Suitable for vegetarians and vegans. The following list of allergens are excluded: Wheat, Barley, Soya, Eggs, Milk (and milk products), Lactose, Nuts, Sulphites, Celery, Fish, Shellfish, Yeast and Gluten containing ingredients. Warnings: This product is not recommended for children or pregnant or lactating women.