is 1000 mg glutathione safe Oral supplementation with liposomal elevates body stores of glutathione and markers of immune function L-Glutathione 1000mg Tablets – Liver

The current clinical evidence of intravenous glutathione for skin lightening is limited to a single study with a dubious study design and apparently flawed analysis of results, casting doubt on the drug's efficacy and reported adverse effects, with no evidence to prove its efficacy.There was only one placebo-controlled study on intravenous glutathione showing 37.5% response versus 18.7% placebo, and IV glutathione is contraindicated due to lack of efficacy and side effects

Front Cell Dev Biol (2015) 3:67

They can help boost collagen production, improve skin texture and tone, and provide numerous other health benefits

Therefore, each 1,200 mg tablet contains a full 1,050 mg of active ingredients, with excipients reduced to the bare minimum