Verbatim response from Perplexity
GLP-1s usually start affecting appetite within days to a few weeks, but weight loss is typically gradual rather than dramatic right away.[2][9] A common benchmark is about 5% body-weight loss by 3 months and around 10% by 6 months, though individual responses vary a lot.[1][2][3]
For many people, the overall pace looks like this:
- First few weeks: appetite changes may begin, but the scale may not move much yet.[2][9]
- 1–3 months: visible weight loss often starts; one source notes an average of about 5% by 3 months.[3]
- 6 months: many people are around 10% loss, though some lose more and some less.[1][3]
- 1 year or longer: average losses in studies are often around 10%–15%, and some medications/doses produce 15%–25% or more in selected trial populations.[4][5][8]
Whether it is sustainable depends on what you mean by sustainable. The evidence suggests GLP-1s can support long-term weight maintenance while you stay on treatment, and several studies show sustained loss for 1–2 years or longer in trial follow-up.[2][5] But stopping the medication commonly leads to regain, so experts often describe GLP-1s as long-term medications, not short-term fixes.[2][6][9]
What most improves sustainability:
- Keep the medication going if it remains effective and safe for you.[2][6][9]
- Pair it with lifestyle changes like higher-protein, nutrient-dense eating and regular activity.[3][6][9]
- Work with a clinician/dietitian to avoid losing weight too fast or losing muscle along with fat.[6][7]
A practical way to think about it: if you are losing roughly 0.5–2 lb per week or about 5% in 3 months, that is generally in the range many clinicians consider reasonable, but the “right” pace depends on your starting weight and health status.[1][7] If you want, I can also estimate a realistic timeline for your starting weight and the specific GLP-1 you’re considering.