There are no over-the-counter alternatives that match the effectiveness of prescription GLP-1 medications
Melanin synthesis requires tyrosinase upregulation, eumelanin polymer formation, and melanosome transfer to keratinocytes, processes that take 7296 hours to become visibly apparent
Therefore, if the duration of diabetes and the follow-up observation period of the included study subjects are insufficient, it may be difficult to determine whether the absence of DR during the observation period is due to the protective effect of the drug or individual factors, potentially leading to false-positive or false-negative results
Semaglutide has clear evidence of long-term effect: over 68 weeks, the 2.4 mg dose gave a mean 14.9% body weight drop, with more than 86% of treated participants losing at least 5% and about one-third losing 20% or more
These medications, initially approved by the FDA for diabetes management under names like Ozempic (semaglutide) and Monjaro (tirzepatide), are now being used to combat obesity
