@StarJo - I wouldn’t be too afraid of glutathione, because it occurs naturally in the body in every one of our cells. I’m sure an overdose would be reason for fear, but if taken as directed, it should not harm you.
I look for further information about any product before using it in or on my body. I, too, am dealing with age spots and would like to remove them, so I investigated glutathione. Glutathione is the most important antioxidant in the body, because it exists inside the cell. Since they reside inside cells, they have the opportunity to destroy free radicals.
I think I’m ready to give it a try. I believe small doses will be safe.