is glutathione safe for breast cancer patients Study Finds Cells Use as Fuel to Drive Growth Frontiers | The dual role

This is the basis for twice-daily dosing

It also states that available safety information is insufficient to know whether harm could occur

Vitamin C contributes to the protection of cells from oxidative stress, supports normal energy-yielding metabolism, and helps maintain the normal function of the immune system

Documentation: Maintain detailed records of BWFI lot numbers, receipt dates, opening dates, discard dates, and any incidents of contamination or quality issues

Because your body already manufactures glutathione continuously, oral supplementation is best understood as topping up and supporting an existing natural process not introducing something foreign