Evidence-based · Every claim cited

Why obesity is hard — and what actually works

Every option compared — prescription drugs, diet, exercise, and supplements. Every claim links to a published study.

Find what fits youCompare all options

See what results could look like for you

These are averages from clinical trials — your results may differ.

What could this mean for you?

Enter your weight to see what the trial averages would mean in real terms.

Enter your weight above to see personalised estimates.

Not sure where to begin?

What actually works
A quick, honest summary
What you can do today
Without a prescription
Do you qualify?
Check BMI thresholds
What to expect
Your first weeks

The main ways people lose weight

Strongest clinical evidence

Prescription Medications

Clinical trials show 7–21% average weight loss. Available as weekly injections or a daily pill from ~$149/month.

Trial results

Tirzepatide20.9%
Oral Wegovy16.6%
Wegovy inj.14.9%
Phentermine9.8%
Diet
5–10%
weight loss
With sustained changes
Exercise
1–3%
alone (more combined)
Essential for health & muscle
Supplements
0.5–2 kg
typical weight loss
Most produce less than 2 kg

How to read this site

Clinical language

All weight loss figures come from clinical trials. We say “participants lost…” — not predictions about your results.

Linked sources

Every stat has a reference that links directly to the source trial or journal article.

Evidence badges

Supplements and cosmetic options are rated Strong / Moderate / Weak based on trial quality.

Browse all 41 clinical trials behind this site →

Based on clinical trials · No rankings · Every claim linked to source

Last reviewed: March 2026

Medical disclaimer: This website is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any treatment.