Benefits: You can reach it on your own
Speaking of which Possible Side Effects Retinol makes your skin peel and dry out for weeks before things get better, and you'll be way more sensitive to the sun as long as you use it
References Angl, S., Engblom, J., Eriksson, T., Kautiainen, S., Saha, M.-T., Lindfors, P., Lehtinen, M., & Rimpel, A
pylori testing is worth requesting
The compounding is legal under specific shortage and clinical-judgment exemptions, but the FDA hasn't independently verified the safety, effectiveness, or quality of any particular compound