Can glutathione and hydroquinone be used together?

Glutathione and hydroquinone are both substances used in skin lightening products. Glutathione is an antioxidant that's naturally produced by the body, while hydroquinone is a synthetic compound.
Glutathione is often used in oral or injectable form to achieve a systemic lightening effect, while hydroquinone is typically used topically for spot treatments. Therefore, in theory, these two substances could be used together for a more comprehensive approach to skin lightening.
However, it's important to note that both substances have potential side effects. Long-term use of hydroquinone can lead to a condition called ochronosis, which causes the skin to become dark and thick. There are also concerns about the safety of long-term systemic use of glutathione for skin lightening.