The honest answer is: it depends on timing and guidance
1990;259:G5305 8
Package Quantity: 1000mg x 90 tablets Benefits: Main ingredients: Direction of use: Major Ingredients Refined Dextrose, Enzyme Extract (Glutathione 2.5%/Estonia), Hydroxypropylmethyl Cellulose, Calcium Carboxymethyl Cellulose, Magnesium Stearate, Palatinose, Silicon Dioxide, Stearic Acid, L-Ascorbic Acid, Gotu Kola Extract Powder (India), L-Cystine, Fish Collagen, Hyaluronic Acid Concoction (Trehalose, Hyaluronic Acid), Milk Ceramide (New Zealand), White Tomato Extract Concentrate Powder (USA), Elastin Hydrolysis (France) *Contains Tomato and Milk Ingredients subject to change at manufacturer's discretion
2005;11:CR2969 16
1 2 Assessment of the Risk of Hepatotoxicity with Kava Products
Some experts suggest NAC might be more consistent at boosting intracellular glutathione than valid oral glutathione supplements (WebMD