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The expiration date helps guarantee the effectiveness of the medication during this time

CL Answer What is the difference between the "Best By" date and the "Date of Manufacture" on a supplement label

Journal of the American College of Nutrition , 34 (6), 470477

Notice that tolerability changes the switch recommendation

No approved drug hits all three at once

That analogy, imperfect as all analogies are, captures why comparing orforglipron with peptide agonists is worthwhile: the destination (GLP-1 receptor activation and its metabolic consequences) is shared, but the molecular route is so different that it changes the drugs absorption, its species reach, its signaling texture, and the very experiments needed to study it