Treatment is recommended for a maximum of 2 years
Your clinician should walk you through your personal tretinoin game plan over time and answer any questions that you have, including how to layer products and perform the sandwiching technique, as well as what potentially irritating active ingredients to avoid using at the same time as tretinoin (AHAs, BHAs, benzoyl peroxide)
Some clinics offer IV administration, though subcutaneous remains the most practical and effective delivery method for most optimization protocols
Many patients find they can gradually reintroduce foods in moderation
Stephens FB, Wall BT, Marimuthu K, Shannon CE, Constantin-Teodosiu D, Macdonald IA, Greenhaff PL