Zepbound vs Foundayo
The strongest injectable weight loss drug vs the only GLP-1 pill with no restrictions. Both made by Eli Lilly — very different results.
21%
Avg weight loss Zepbound
11.1%
Avg weight loss Foundayo
$1,059/mo
Zepbound retail (no insurance)
$149
Zepbound via telehealth
What are they?
Both come from Eli Lilly, but Zepbound uses injectable tirzepatide with a dual GIP/GLP-1 mechanism, while Foundayo is a daily oral orforglipron pill.
Zepbound
Weight ManagementFDA-approved for chronic weight management in adults with obesity (BMI 30+) or overweight (BMI 27+) with at least one weight-related condition. Uses the same dual GIP/GLP-1 mechanism as Mounjaro at equivalent doses.
Maker
Eli Lilly
Approved
2024
Format
Weekly injection
Max dose
15 mg
Foundayo
Weight ManagementFDA-approved oral GLP-1 receptor agonist for chronic weight management — the first weight-loss pill that can be taken at any time of day with no food or water restrictions. Made by Eli Lilly, approved April 2026.
Maker
Eli Lilly
Approved
2026
Format
Daily oral pill
Max dose
17.2 mg
Quick comparison
How they stack up on the metrics that matter most.
| Feature | Zepbound | Foundayo |
|---|---|---|
| Active ingredient | Tirzepatide | Orforglipron |
| FDA approved for | Weight Management | Weight Management |
| Max dose | 15 mg | 17.2 mg |
| Avg weight loss | ~21% | ~11.1% |
| Administration | Weekly injection | Daily oral pill |
| Insurance | Limited | Limited |
| Retail price/mo | $1,059/mo | $779/mo |
| Telehealth price | From $149/mo | From $149/mo |
Zepbound
Tirzepatide
Foundayo
Orforglipron
Zepbound
Weight Management
Foundayo
Weight Management
Zepbound
15 mg
Foundayo
17.2 mg
Zepbound
~21%
Foundayo
~11.1%
Zepbound
Weekly injection
Foundayo
Daily oral pill
Zepbound
Limited
Foundayo
Limited
Zepbound
$1,059/mo
Foundayo
$779/mo
Zepbound
From $149/mo
Foundayo
From $149/mo
More energy,
less weight
How you ramp up
Both medications use a gradual dose escalation to minimize side effects.
Zepbound
- 1
2.5 mg
Weeks 1–4
- 2
5 mg
Weeks 5–8
- 3
7.5 mg
Weeks 9–12
- 4
10 mg
Weeks 13–16
- 5
12.5 mg
Weeks 17–20
- 6
15 mg
Weeks 21+
(Maintenance)
Foundayo
- 1
0.8 mg
Month 1
(Daily)
- 2
2.5 mg
Month 2
(Daily)
- 3
5.5 mg
Month 3
(Daily)
- 4
9 mg
Month 4
(Daily)
- 5
14.5 mg
Month 5
(Daily)
- 6
17.2 mg
Month 6+
(Maintenance)
What you’ll pay
Real pricing — no misleading teaser rates or hidden fees.
Zepbound
- Retail (no insurance)
- $1,059/mo
- With insurance
- $25–$200/mo
- Telehealth (compounded)
- From $149/mo
- Manufacturer savings
- Available
Special offer
Save up to 30% EVERY month!
Foundayo
- Retail (no insurance)
- $779/mo
- With insurance
- $25–$200/mo
- Telehealth (compounded)
- From $149/mo
- Manufacturer savings
- Available
Special offer
Save up to 30% EVERY month!
Some providers pay BestGLP1 a referral fee when you sign up. We disclose this because the FTC requires it. Our rankings are editorial.
Start your weight‑loss
journey today
Weight loss compared
Clinical trial data showing average body weight reduction over 68 weeks.
Zepbound (15 mg)
Foundayo (17.2 mg)
Placebo
What to expect
How they stack up on the metrics that matter most.
| Side Effect | Zepbound | Foundayo |
|---|---|---|
| Nausea | 25% | 35% |
| Diarrhea | 19% | 25% |
| Vomiting | 8% | 22% |
| Constipation | 17% | 24% |
| Headache | 4% | 9% |
| Fatigue | 5% | 9% |
Zepbound
25%
Foundayo
35%
Zepbound
19%
Foundayo
25%
Zepbound
8%
Foundayo
22%
Zepbound
17%
Foundayo
24%
Zepbound
4%
Foundayo
9%
Zepbound
5%
Foundayo
9%
* Foundayo rates at 17.2 mg max dose
Side effects are generally most pronounced during the first 4–8 weeks and tend to subside. Always consult your healthcare provider.
The bottom line
Different molecules, different mechanisms. Here’s how to think about it.
Choose based on your goal
- Choose Zepbound if you want Zepbound (FDA-approved for chronic weight management) for the highest average weight loss outcomes — the dual GIP/GLP-1 mechanism produces higher average weight loss than Foundayo in trials.
- Choose Foundayo if needle anxiety or injection inconvenience is a deal-breaker — Foundayo (FDA-approved for chronic weight management) is the only weight loss pill with no food or timing restrictions.
Some providers pay BestGLP1 a referral fee when you sign up. We disclose this because the FTC requires it. Our rankings are editorial.
What you
need to know
Yes — in head-to-head trial averages, Zepbound delivers about 21% body weight reduction over 68 weeks compared with Foundayo’s 11.1%. Zepbound’s dual GIP/GLP-1 mechanism is the strongest FDA-approved weight loss drug currently available.
Yes, switching is possible with provider guidance. Most patients see lower outcomes after moving from Zepbound to Foundayo because tirzepatide is more potent, so providers will reset expectations and titrate Foundayo carefully.
Tirzepatide activates both GIP and GLP-1 receptors via weekly injection, while orforglipron is an oral GLP-1-only pill. Tirzepatide produces roughly double the average weight loss in trials, but orforglipron offers the convenience of a daily tablet with no food or water restrictions.
Yes. Eli Lilly distributes Foundayo through LillyDirect alongside Zepbound, giving patients a direct-to-consumer fulfillment option. Pricing and eligibility vary — check the LillyDirect site for the latest cash-pay rates.
Yes. Both Zepbound and Foundayo require a prescription from a licensed healthcare provider. A consultation is required to assess whether treatment is appropriate for you.
BestGLP1 publishes these guides for informational and comparison purposes only. The information on this site is not medical advice, diagnosis, or treatment, and is not a substitute for guidance from a licensed healthcare professional. GLP-1 medications must be prescribed and monitored by a qualified provider; consult your provider to determine whether treatment is appropriate for your individual circumstances. Prices, side-effect rates, and clinical figures shown here are general references drawn from manufacturer labelling and published trials, and may not reflect your specific situation.
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Some providers pay BestGLP1 a referral fee when you sign up. We disclose this because the FTC requires it. Our rankings are editorial.