The fundamental problem with oral glutathione is absorption
Underdosing means it will not work
So at least in that regard, if patients are obtaining drug from a pharmacy that has a reputation for quality products, I feel a little more comfortable, but as you mentioned, the regulation is not as robust, if you will.
It is sun protection, smoking cessation, adequate sleep, hydration, sufficient dietary protein, and for the women who are appropriate candidates systemic hormone therapy, which independently improves dermal collagen, skin thickness, and elasticity
Symptoms may include swelling of your face, lips, tongue, or throat, problems breathing or swallowing, severe rash, fainting, or a very rapid heartbeat