For people who want maximum simplicity, the ranking is clear: oral medications (metformin, phentermine, Contrave) require swallowing a pill
Whey protein isolate is low in lactose and very easy to digest
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If you're someone who prefers the transdermal format over swallowing supplements, wants a once-daily application routine to complement glucose balance and metabolic wellness alongside your lifestyle, and isn't currently on prescription medication that might interact with botanical glucose-management compounds without first getting your provider's input - GLPatch is worth putting on your evaluation list