|All Peptides

Read the full guides

DosingBenefitsResultsBuying Guide

Tesofensine

Last reviewed: April 18, 2026 by The Peptide Catalog Team

A weight loss compound for powerful appetite suppression and fat burning. Tesofensine is a serotonin-noradrenaline-dopamine reuptake inhibitor (SNDRI) originally developed for Parkinson's and Alzheimer's disease. Phase 2 trials showed remarkable weight loss of up to 12.8% over 6 months — more than double most approved obesity drugs. Works by reducing appetite and increasing satiety through triple monoamine reuptake inhibition.

CategoryWeight Loss & Metabolic Peptides
Classmetabolic
GoalFat Loss
Overview

Core Benefits

Key Advantages
Triple monoamine fat loss
Blocks reuptake of serotonin, norepinephrine, and dopamine.
12.8% weight loss
Phase 2 trials showed 12.8% weight loss in 24 weeks.
Strong satiety
Sharp appetite reduction over the dosing window.
Metabolic boost
Catecholamine effects raise resting energy expenditure.
Oral convenience
Daily capsule — no injections required.
Pharmaceutical compound
Not a peptide — small molecule with stimulant profile.

These are educational summaries of commonly discussed effects in wellness/regenerative contexts, not guarantees.

Tesofensine Results Timeline

Progression
1
Week 1–2
Physical Changes
Metabolic activation begins, possible appetite changes
Performance & Recovery
Increased energy levels, improved focus
Other Benefits
Oral dosing — no injections required
2
Week 3–6
Physical Changes
Early fat mobilization, subtle weight changes
Performance & Recovery
Sustained energy, reduced fatigue
Other Benefits
Appetite suppression (tesofensine) or metabolic shift (5-amino-1mq)
3
Month 2–3
Physical Changes
Visible fat loss, improved body composition
Performance & Recovery
Consistent energy throughout the day
Other Benefits
Metabolic benefits accumulating
4
3+ Months
Physical Changes
Significant fat reduction with proper diet
Performance & Recovery
Sustained metabolic improvements
Other Benefits
Best results combined with diet and exercise

Timeline is illustrative and non-guaranteed. Outcomes vary and are commonly discussed alongside training, nutrition, sleep, and cycling practices.

Best Kit Deal10-VialCOASave 32%

Nura Peptide — 50mg × 10 (500mg) — $1260 $945 with code thepeptidecatalog (25% off) ($1.89/mg)

Evidence at a glance

Two parallel grades per outcome — clinical RCT depth and real-world community adoption. See the Research Overview below for citations and detail.

OutcomeClinical EvidenceCommunity Evidence
Body weight reduction (obesity)ModerateWeak
Cardiovascular safety (BP / HR)ModerateWeak
Approval for chronic obesity (US/EU)PreliminaryWeak
How It WorksSmall Molecule — Triple Monoamine Reuptake Inhibitor (Not a Peptide)

Transporter Inhibition → Neurotransmitter Increase → Appetite Control → Outcomes

1
Target

Serotonin, Norepinephrine, Dopamine Transporters

Tesofensine inhibits reuptake of three neurotransmitters: serotonin (satiety), norepinephrine (energy expenditure), and dopamine (reward/motivation). This triple action reduces appetite while increasing energy expenditure and reducing food cravings.

2
Cellular Signal

Increased Synaptic Monoamines → Central Appetite Control

By blocking reuptake, tesofensine increases the availability of all three monoamines in the brain. Serotonin reduces hunger. Norepinephrine increases thermogenesis. Dopamine reduces food-seeking behavior and cravings. The triple mechanism creates powerful appetite suppression.

3
Systemic Effect

Strong Appetite Suppression + Increased Energy Expenditure

Clinical trials showed ~10-13% body weight loss at 0.5mg dose — significant for a non-GLP-1 agent. Increased resting metabolic rate. The dual "eat less + burn more" effect is similar conceptually to retatrutide but via different mechanisms.

4
What You Notice

Reduced Appetite + More Energy → Weight Loss

Noticeable appetite reduction within days. Increased energy and alertness (norepinephrine effect). Reduced food cravings (dopamine effect). Potential side effects: increased heart rate, elevated blood pressure, insomnia — cardiovascular monitoring is important.

What Makes This Peptide Different

Tesofensine is not a peptide— it's a centrally-acting monoamine reuptake inhibitor originally developed for Parkinson's and Alzheimer's. The weight-loss effect was discovered as a side effect. Unlike GLP-1 agonists (gut/pancreas), tesofensine works entirely in the brain. Requires cardiovascular monitoring due to heart rate and blood pressure effects.

Research overview

Outcome-by-outcome look at what the evidence actually supports for Tesofensine, including human vs. animal study counts and our editorial take on each.

Body weight reduction in obesity

Clinical:ModerateCommunity:Weak

Astrup 2008 (Lancet Phase 2, n=203) showed tesofensine produced 9.2% weight loss at 0.5 mg and 10.6% at 1.0 mg over 24 weeks vs 2.0% placebo. The result was striking enough to motivate Phase 3 development — but the Phase 3 program ended without FDA or EMA approval, with the molecule eventually approved only in Mexico (Tesomet, in combination).

2 human studies · 6 animal studies

Key findings & citations
  • 9.2% weight loss at 0.5 mg over 24 weeks (Astrup 2008).
  • Triple monoamine reuptake inhibitor — central mechanism, not GLP-1.
  • Heart rate increase is a real cardiovascular safety signal at higher doses.
  • No FDA/EMA approval as of 2026; Tesomet (tesofensine + metoprolol) approved in Mexico.

Our take

Real weight-loss effect, real cardiovascular cost. The reason GLP-1 agents won the obesity race is exactly that tesofensine class compounds came with HR/BP penalties.

What Tesofensine doesn't do

Claims that current evidence does not support. Worth knowing before you set expectations.

Tesofensine Vendors

10% OFF
COA

Glacier Aminos

Score
10/10
Price
$103.49
$114.99
Amount
30mg
Cost/mg
$3.83/mg
Save 10% with code thepeptidecatalog at checkout.
View at Glacier Aminos
COA

Swiss Chems

Score
9/10
Price
$120.99
Amount
15mg
Cost/mg
$8.07/mg
Ships Worldwide
View at Swiss Chems
Dosing ProtocolWeight Loss / Appetite Control

Educational reference only. Individual responses vary. Consult healthcare provider before use.

Vial Size
0.25 mg or 0.5 mg capsules
Reconstitution
N/A (oral capsules)
Dose
0.25-0.5 mg
Timing
AM (with or without food)
Frequency
Daily
Duration
12-24 weeks (clinical trial durations)
Protocol Notes
Triple reuptake inhibitor (serotonin, norepinephrine, dopamine). Not a peptide. May cause increased heart rate and blood pressure. Monitor cardiovascular parameters.

Why This Dosing Protocol

Why morning? The norepinephrine and dopamine effects are stimulating. Morning dosing avoids insomnia.

Why 0.25-0.5mg? Clinical trials tested 0.25mg, 0.5mg, and 1.0mg. The 0.5mg dose had the best efficacy-to-side-effect ratio. Higher doses increased heart rate and blood pressure concerns.
Full Dosing GuideReconstitution CalculatorCycle Cost Calculator
Molecular Structure
  • Type: Small Molecule (SNDRI)
    (Serotonin-Norepinephrine-Dopamine Reuptake Inhibitor)
  • Molecular Weight: ~384 Da
    (Small molecule, not a peptide)
  • Administration: Oral (capsule)
    (No injection required)
  • Half-Life: ~200+ hours
    (Once-daily dosing)
Mechanism
Inhibits 5-HT, NE, DA reuptake → Reduces appetite → Increases satiety → Weight loss
Phase 2 trials showed 12.8% weight loss at 0.5mg over 6 months — more than double most approved obesity drugs. Cardiovascular effects (heart rate, blood pressure) are being carefully monitored in ongoing Phase 3 trials.
Key takeaway: Tesofensine's triple monoamine reuptake inhibition makes it one of the most effective weight loss compounds studied, though cardiovascular safety profiles are still being evaluated in clinical trials.

FAQ

Is tesofensine a peptide?

No, tesofensine is not a peptide. It's a small molecule drug that acts as a serotonin-noradrenaline-dopamine reuptake inhibitor (SNDRI). It was originally developed for neurological conditions like Parkinson's and Alzheimer's disease before its weight loss effects were discovered during clinical trials.

How does tesofensine work for weight loss?

Tesofensine inhibits the reuptake of three neurotransmitters: serotonin, norepinephrine, and dopamine. This triple action reduces appetite, increases feelings of fullness (satiety), and may slightly increase energy expenditure. The combined effect on these three monoamines makes it more effective than single-target appetite suppressants.

What weight loss results were seen in tesofensine trials?

Phase 2 clinical trials showed remarkable results: participants lost an average of 12.8% of body weight at the 0.5mg dose over 6 months, compared to about 2% for placebo. This is more than double what most approved obesity medications achieve, making tesofensine one of the most effective weight loss compounds studied.

Why isn't tesofensine FDA approved yet?

Tesofensine showed dose-dependent increases in heart rate and blood pressure in trials, which raised cardiovascular safety concerns. The FDA requires extensive cardiovascular outcome studies for obesity drugs. Phase 3 trials are ongoing with careful monitoring of these parameters. The risk-benefit profile is still being evaluated.

What are the potential side effects of tesofensine?

Common side effects observed in trials include dry mouth, constipation, insomnia, and headache. More concerning effects include increased heart rate (tachycardia) and elevated blood pressure. These cardiovascular effects are dose-dependent and require monitoring. Mood changes are also possible due to its effects on dopamine and serotonin.

Scientific Sources

The following peer-reviewed studies and official resources provide additional scientific context for this peptide:

Tesofensine Research Articles

guides

Tesofensine Dosage: 0.5mg/Day Community Protocol

Community protocols cluster at 0.5mg/day — but the starting dose matters. Timing, cycling, half-life, and side effects by dose.

results

Tesofensine Results: Week-by-Week Timeline

Appetite suppression in days, weight loss over months. What the Phase 2 trial documented week 1 through month 6 at 0.5mg/day oral.

guides

Buy Tesofensine: Compare 3 Vendors, From $114.99

Compare 3 Tesofensine vendors side by side: from $114.99 a vial, best value $2.80/mg. Codes save up to 25%. Vial sizes, COA status, real cost per week.

benefits

Tesofensine: 10.6% Weight Loss in 24 Weeks

Tesofensine hit 10.6% weight loss in 24 weeks — outpacing older drugs 2:1. 5 research-backed benefits ranked by evidence strength.

Compare Tesofensine to alternatives

Side-by-side mechanism, dose, half-life, and vendor pricing.

Open compare →

Disclosure: we may earn affiliate commission from qualifying purchases. Educational information only — not medical advice.