What is SLU-PP-332?
SLU-PP-332 is a lab-made molecule — a synthetic research compound, not a peptide (tiny protein) like many of the others in this library. Scientists study it as an "exercise mimetic," which is a compound that switches on some of the same signals inside cells that a real workout does. The name comes from Saint Louis University (SLU), where the molecule was first developed.
Here's the simplest way to picture it. Deep inside your cells are tiny power plants called mitochondria — they burn fuel to make energy. Cells also have a master "energy dial" that controls how hard those power plants run. The dial is a control switch called the estrogen-related receptor (ERR). SLU-PP-332 grabs that dial and turns it up, and that's the whole reason it draws attention: in lab studies, turning up the dial looked a lot like what exercise does.
The quick version
Turns up the energy dial
It switches on ERR, a master control that runs the cell's tiny power plants (mitochondria).
An "exercise mimetic"
In mice it switched on many of the same genes a workout does, without the exercise.
Hits all three ERRs
It's a pan-agonist — a key that turns on all three ERR types (α, β, γ), and it's strongest on ERRα.
99%+ pure
Every batch is checked by lab testing (HPLC + LC-MS) and ships with a certificate.
How it works, in plain terms
Cells control big groups of genes using nuclear receptors — think of these as master switches inside the cell that turn whole programs on at once. ERR is one of these switches, and it sits over the "burn fuel and build power plants" program. An agonist is simply a key that flips a switch to on; SLU-PP-332 is an ERR agonist, so it flips that energy switch on. Because it turns on all three kinds of ERR (called α, β, and γ), scientists call it a pan-agonist.
Here's what published studies describe, in everyday language:
- It mimics an exercise "gene program." In mice, a single dose switched on a set of genes that also turns on right after acute aerobic exercise — the effect depended most on the ERRα switch.
- It's tied to burning more fat and using more energy. In obesity models, treated mice showed higher energy expenditure and more fatty-acid oxidation (burning fat for fuel).
- It's linked to endurance. Treated mice ran farther and longer in some studies, and showed more of the fatigue-resistant (oxidative) muscle fiber type.
- Chemistry matters. The original SLU-PP-332 isn't well absorbed by mouth, so researchers have since built related molecules (like SLU-PP-915) to explore oral versions.
| Dial (ERR) | What it's linked to | SLU-PP-332 activity |
|---|---|---|
| ERRα | Muscle and heart energy — its main target | Strongest |
| ERRβ | Energy metabolism programs | Also activated |
| ERRγ | Endurance (oxidative) tissues | Also activated |
What scientists actually study it for
Because it targets the cell's energy machinery, SLU-PP-332 shows up most in metabolism and muscle research. The main areas in the published literature are:
- Metabolism and obesity models — whether turning up ERR is linked to lower fat mass, better blood-sugar handling, and higher energy use in diet-induced obese mice.
- Exercise mimetics — the headline idea: can a molecule reproduce parts of an aerobic-exercise response in the body's tissues.
- Muscle function and endurance — effects on muscle fiber types and running performance in animal studies, with interest in aging and muscle-wasting models.
- Mitochondrial and aging research — because ERR governs the power plants, it's also examined in cell studies of mitochondrial function.
Purity and testing (why the certificate matters)
In research, your results are only as trustworthy as the material you start with. Every batch of SLU-PP-332 from Peptora is checked to 99%+ purity by HPLC, confirmed by a second test (LC-MS) that proves it's the right molecule, and run through a full quality-control panel before it ships. Every order comes with a certificate of analysis (COA) for that exact batch.
To learn what the numbers on a certificate actually mean, see the guide on what a certificate of analysis is and the research-peptide overview.
How it's handled in the lab
SLU-PP-332 ships as a freeze-dried powder (that's what lyophilized means — the water has been removed to keep it stable). Because it's a water-shy molecule, labs often note it needs care to dissolve; reconstitution ("mixing the powder back into a liquid") is the usual first step. A little care keeps the material intact so results stay reliable:
- 1Let the sealed vial warm up to room temperature before opening it.
- 2Add the liquid slowly down the side of the vial, then swirl gently — don't shake.
- 3Give it time to fully dissolve before drawing anything out.
- 4Keep the mixed solution in the fridge, away from light.
Step-by-step details are in the reconstitution guide. Doing these the same way every time is one of the easiest ways to keep research consistent.
Scientific references
SLU-PP-332 is a synthetic pan-agonist of the estrogen-related receptors (ERRα/β/γ) studied as an exercise mimetic in cell and animal models. The studies below are provided for background, from PubMed. They describe research on the compound itself — not the laboratory research product Peptora supplies.
- 1Billon C, et al. Synthetic ERRα/β/γ Agonist Induces an ERRα-Dependent Acute Aerobic Exercise Response and Enhances Exercise Capacity. ACS Chem Biol. 2023;18(4):756-771. doi:10.1021/acschembio.2c00720 (PMID: 36988910).
- 2Billon C, et al. A Synthetic ERR Agonist Alleviates Metabolic Syndrome. J Pharmacol Exp Ther. 2024;388(2):232-240. doi:10.1124/jpet.123.001733 (PMID: 37739806).
- 3Billon C, et al. An orally active estrogen receptor-related receptor agonist, SLU-PP-915, enhances aerobic exercise capacity. J Pharmacol Exp Ther. 2025;393(1):103787. doi:10.1016/j.jpet.2025.103787 (PMID: 41421047).
- 4Okda HE, et al. Chemical optimization of the exercise mimetic SLU-PP-332 enables insight into estrogen-related receptor signaling. Int J Biol Macromol. 2026;355:151450. doi:10.1016/j.ijbiomac.2026.151450 (PMID: 41850449).
- 5de Souza-Lima J, et al. Pharmacological Activation of ERRα/β/γ as an Exercise Mimetic: Potential Therapeutic Applications (systematic review). Rev Med Chil. 2026;154(2):237-245. doi:10.4067/s0034-98872026000200237 (PMID: 42024694).
- 6Möller T, Krug O, Thevis M. In Vitro Metabolism and Analytical Characterization of SLU-PP-332 and SLU-PP-915: Novel Pan-ERR Agonists With Doping Potential. Rapid Commun Mass Spectrom. 2026;40(8):e70039. doi:10.1002/rcm.70039 (PMID: 41588687).
Explore research-grade SLU-PP-332
99%+ pure, a certificate of analysis with every batch, fast U.S. shipping — for laboratory research use only.
View SLU-PP-332Key takeaways
- SLU-PP-332 is a lab-made molecule (not a peptide) studied as an "exercise mimetic" — a compound that switches on some of the same cell signals as a workout.
- It works by turning up ERR, a master "energy dial" that controls the cell's tiny power plants (mitochondria) and the fat-burning, energy-using programs they run.
- In mouse studies it was linked to more fat-burning, higher energy expenditure, better endurance, and lower fat mass — most of it depending on the ERRα switch.
- All of the evidence is preclinical (cells and animals); human trials haven't been done, so it's a research tool, not a proven treatment, and not for people or animals.
- Every batch is 99%+ pure (checked by HPLC and LC-MS), ships as a freeze-dried powder, and comes with a certificate of analysis.
Frequently asked questions
This article is intended solely as an educational summary of publicly available scientific literature. Products offered by Peptora are supplied exclusively for laboratory research purposes and are not approved for human or veterinary use. The information presented should not be interpreted as medical advice, treatment recommendations, or clinical guidance.
