That's a decision your provider makes with you. Oana offers three strengths so you're not locked into a one-size-fits-all formula: 0.025% is a gentle starting strength for first-time retinoid users or more reactive skin; 0.05% is a balanced middle-ground option for ongoing acne control and smoother texture; and 0.1% is a more intensive formula for patients who need it and tolerate Tretinoin well.
Because Tretinoin can be irritating when you start, matching the strength to your skin matters — that's why Oana offers multiple strengths rather than a single formula. Your provider personalizes it based on your acne history, sensitivity, and goals.