Every GLP-1 comparison site shows monthly price. Almost none show value — the actual return on each dollar spent in terms of clinically meaningful weight loss. Monthly price is a cost metric. Cost-per-percent-lost is a value metric. They tell very different stories.
The Framework
Clinical trials show average weight loss of approximately 15% on semaglutide 2.4 mg over 68 weeks, and 22.5% on tirzepatide 15 mg over 72 weeks. To reach these results, patients spend approximately 15–17 months on medication, titrating up through lower doses to maintenance.
The cost-per-percent-lost calculation is straightforward: total cost over the treatment period divided by total percentage of body weight lost. This normalizes for both the price of the medication and its effectiveness — a more expensive drug that produces more weight loss may actually be a better value than a cheaper one that produces less.
Sample Calculations (Compounded Telehealth)
| Provider Type | Monthly Cost | 15-Month Total | Expected Loss | Cost Per % Lost |
|---|---|---|---|---|
| Budget sema ($99/mo flat) | $99 | $1,485 | ~12–15% | $99–$124 |
| Mid-range sema ($149/mo avg) | $149 | $2,235 | ~12–15% | $149–$186 |
| Premium sema ($299/mo maint.) | ~$224 avg | $3,360 | ~12–15% | $224–$280 |
| Budget tirz ($133/mo flat) | $133 | $1,995 | ~18–22% | $91–$111 |
| Brand Wegovy (no insurance) | ~$1,300 | $19,500 | ~15% | $1,300 |
| Brand Zepbound (self-pay) | ~$399 | $5,985 | ~20–22% | $272–$299 |
The numbers reveal something counterintuitive: flat-rate tirzepatide at $133/month may be the best value in the market — producing more weight loss per dollar than semaglutide at any price point, because tirzepatide's higher efficacy more than offsets its higher cost.
Monthly cost is a misleading comparison metric because it ignores efficacy differences. A $99/month semaglutide provider and a $133/month tirzepatide provider look like the semaglutide is cheaper — but if tirzepatide produces 50% more weight loss, the tirzepatide is actually the better value per percentage point lost. Compare outcomes, not invoices.
These calculations use average trial results applied to telehealth pricing — individual results vary widely. Not every patient achieves the average. Provider quality, dosing protocols, and patient adherence all affect outcomes. This framework is a starting point for comparison, not a guarantee of results. Also: the cheapest option is only a "value" if you can tolerate the medication and actually take it consistently. The best value is the one you'll stick with.
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Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. All medications require evaluation by a licensed healthcare provider. Compounded medications are not FDA-approved. Individual results vary.