SLU-PP-332 Capsules vs Vial: Weighing Up the Oral Evidence
You will find SLU-PP-332 sold as capsules, tablets and drops almost everywhere, yet not one published study has demonstrated that the compound works when swallowed. Its developers dosed their mice by injection, and in 2026 the same team stated plainly that SLU-PP-332 lacks oral bioavailability. If your research is meant to line up with the literature, the vial is the format to choose.
Buy SLU-PP-332 Australia Researchers Use, in the Format the Studies Injected
SLU-PP-332 is a small synthetic molecule that activates the estrogen-related receptors ERR alpha, beta and gamma. It came out of Thomas Burris's laboratory. Readers meeting it for the first time can get the receptor background from our explainer on what SLU-PP-332 is. Here we focus on a single question, which is whether format makes a difference. It does, and the reason lies in how the evidence was generated.
Both of the original in vivo papers delivered the compound by intraperitoneal (i.p.) injection, meaning it went into the mouse's abdominal cavity.
- ACS Chemical Biology (2023), Billon and co-authors. The team began by measuring plasma and muscle exposure following an intraperitoneal dose. They then carried out the muscle fibre, gene expression and treadmill endurance work using intraperitoneal injections given twice a day.
- Journal of Pharmacology and Experimental Therapeutics (2024, published online in 2023), Billon and co-authors. For the metabolic syndrome work, diet-induced obese mice and ob/ob mice were injected intraperitoneally with SLU-PP-332 twice a day for 28 days, or 12 days in the ob/ob group.
Every widely quoted result, from a shift towards oxidative muscle fibres and longer running times to reduced fat gain and improved insulin sensitivity, therefore comes from injected material. Capsules, drops and tablets played no part in any of it. To match that work, buy SLU-PP-332 online in Australia as a 5 mg lyophilised vial.
Order SLU-PP-332 Online and Hear What Its Developers Say About Oral Use
The most direct statement on oral use comes from the Burris team. Their paper by Billon, Appourchaux, Côté and Burris, titled "An orally active estrogen receptor-related receptor agonist, SLU-PP-915, enhances aerobic exercise capacity", appeared in the Journal of Pharmacology and Experimental Therapeutics in January 2026 after going online in December 2025. In it they note that their earlier compound, SLU-PP-332, boosts aerobic performance in mice yet "lacks oral bioavailability."
The oral shortcoming is the whole reason that paper was written. It presents SLU-PP-915, a separate ERR pan-agonist with a different chemical structure that can be absorbed orally. With both compounds injected intraperitoneally, SLU-PP-915 equalled SLU-PP-332 on treadmill distance and duration, and when SLU-PP-915 was given by mouth it held comparable efficacy once systemic exposure was taken into account. The paper offers no matching oral result for SLU-PP-332.
Does SLU-PP-332 work orally, then? Put honestly, there is no published proof that it does, and the laboratory that created it says it lacks oral bioavailability. The same collaborators published a structure-activity study in 2026 (Okda et al., International Journal of Biological Macromolecules) on analogues of the SLU-PP-332 scaffold with better solubility or metabolic stability, a clear sign those were weaknesses worth fixing.
Shop SLU-PP-332 for Sale Knowing Why Small Molecules Can Fail Orally
- Low solubility in water. SLU-PP-332 is made up of two aromatic ring systems and carries a calculated XLogP of 3.7. Molecules of this kind tend to dissolve badly in gut fluid, and anything left undissolved never gets absorbed.
- First-pass metabolism. Whatever the gut does absorb travels through the liver before it reaches the wider circulation. Two in vitro studies from 2026 that used human liver fractions (Avliyakulov et al., Drug Testing and Analysis; Möller et al., Rapid Communications in Mass Spectrometry) found hydroxylated metabolites of SLU-PP-332 along with glucuronide and sulfate conjugates. The free phenol group on the molecule is a textbook site for that type of conjugation.
- Sensitivity to acid. As a rule, hydrazone bonds break down by hydrolysis under acidic conditions, and stomach contents are acidic. Nobody has published whether this matters for SLU-PP-332 in practice, so regard it as an open question rather than a result.
Those two doping-control studies were written because the World Anti-Doping Agency bans exercise mimetics and metabolic modulators in sport, and SLU-PP-332 has attracted notice as a possible target for misuse.
Buy SLU-PP-332 Drops, Tablets, Liquid or Capsules With the Evidence in View
Drops, tablets, liquids and capsules of SLU-PP-332 all draw steady demand. The table below shows how each format measures up against what has actually been published.
| Format | Pharmacokinetic data in print | Lines up with the published efficacy work? |
|---|---|---|
| Lyophilised powder in a vial | Plasma and muscle exposure measured after injection (ACS Chem Biol, 2023) | Yes, the researchers dissolved the compound and injected it into mice |
| Capsules | None published | No |
| Tablets | None published | No |
| Oral drops or liquid | None published | No |
Liquids and drops bring an extra complication. A molecule that dissolves poorly in water needs a solvent or carrier to stay in solution, and sellers seldom disclose which one they use or how well the compound holds up in it over weeks at room temperature. Lyophilised powder sidesteps the issue until the researcher picks a vehicle.
That does not prove oral formats are inactive. It simply means nobody has published data showing they are active, while the compound's own developers have said the reverse. The same logic applies to the injection versus oral comparisons for slu pp 332 that circulate online. With no published oral exposure data, there is nothing on one side of the comparison.
Order NovaPep SLU-PP-332 Capsules With a Straight Answer on What They Are For
NovaPep offers SLU-PP-332 in two formats, a 5 mg lyophilised vial and a 60-capsule pack. We sell both strictly for laboratory research. For each lot of either format, an external laboratory confirms identity by mass spectrometry and purity by HPLC, and the lot number printed on the product brings up its report in our certificate of analysis lookup.
We will not claim that the capsules work by mouth, since published evidence does not back that up. The capsule format is there for researchers who want to investigate oral exposure itself, such as measuring how much compound reaches plasma through that route or comparing one formulation with another. That is a fair research question and one the literature has left open. It is the wrong format, however, for anyone trying to replicate the published endurance or metabolic findings. SLU-PP-332 capsules are for sale in Australia in a 60 pack for researchers studying the oral format itself.
Our advice is simple. Work that builds on Billon et al. should use the SLU-PP-332 5 mg vial. Work asking whether oral SLU-PP-332 gets into the circulation at all suits the capsules, paired with a method for measuring exposure. For guidance on handling freeze-dried material and interpreting COA figures, read the guide to reading a certificate of analysis and our storage guide for lyophilised compounds.
Shop Related Mitochondrial and Metabolic Research Compounds Online
Labs working with SLU-PP-332 tend to look at several points in mitochondrial and metabolic signalling at once. These are the compounds most often paired with it.
- MOTS-c, a mitochondrial-derived peptide of 16 amino acids that works through AMPK instead of the ERRs. Animal and human data are summarised in our overview of MOTS-c research findings.
- 5-Amino-1MQ, a small molecule that inhibits NNMT and is studied in fat cell metabolism. Order 5-Amino-1MQ online as a 50 mg research product from local stock.
- NAD+ in a 500 mg vial, the redox cofactor sitting at the heart of mitochondrial energy metabolism.
- SS-31 (elamipretide), a tetrapeptide aimed at cardiolipin within the inner mitochondrial membrane.
Buy SLU-PP-332 Online in the Right Format, Vial or Capsules
The evidence above leads straight to our advice. Order the 5 mg SLU-PP-332 vial for any study designed to reflect the published mouse research, because injection is the only route with exposure data behind it. The 60-capsule bottle, holding 250 mcg in each capsule, is the right pick when oral exposure is the very thing being tested. Some groups buy both and measure the difference. Either format ships from Australian stock, and NAD+ or SS-31 can go in the same cart when a second mitochondrial target is needed.
NovaPep sells every compound listed here, SLU-PP-332 included, to adults 18+ for laboratory research alone. None is meant for people or animals, and this page provides no dosing or administration guidance. See the full range in our mitochondrial research compounds collection.
SLU-PP-332 Capsules vs Vial: Weighing Up the Oral Evidence FAQ
Is SLU-PP-332 active when taken by mouth?
No published evidence shows that it is. In a 2026 JPET paper its developers state that it lacks oral bioavailability, and their published mouse studies delivered it by intraperitoneal injection. That same laboratory went on to create a separate compound, SLU-PP-915, precisely because it can be absorbed orally.
Are SLU-PP-332 capsules effective?
Nobody has published a study testing SLU-PP-332 capsules or any other oral SLU-PP-332 product. The endurance and metabolic findings all come from mice given injected compound. Capsules have a place in research that measures oral exposure directly, but there is no evidence that they replicate the published results.
How is SLU-PP-332 different from SLU-PP-915?
Each is an ERR pan-agonist from the Burris laboratory, though their chemistry differs. SLU-PP-332 was developed first and lacks oral bioavailability. SLU-PP-915, reported in JPET in 2026, can be absorbed orally. It equalled SLU-PP-332 on treadmill endurance in mice when both were injected, and showed comparable efficacy when given by mouth.
Do SLU-PP-332 drops or liquids beat capsules?
Neither has any published data behind it. Liquids and drops raise the same absorption doubts as capsules, and they add a stability concern too, since a compound that dissolves poorly in water needs a solvent to remain in solution. A lyophilised vial keeps the material dry until the researcher selects a vehicle.
What makes the SLU-PP-332 vial a better choice than capsules?
The vial mirrors the published work. Billon et al. measured exposure and carried out their endurance and metabolic studies with injected compound. Any lab aiming for results comparable with that literature should begin with the same type of material, whereas oral formats fit studies built to measure oral exposure itself.
Where do I buy SLU-PP-332 vials or capsules online?
NovaPep ships both formats online from Australian stock, with the 5 mg lyophilised vial and a 60-capsule bottle of 250 mcg capsules. Every lot is independently tested and its certificate sits in the COA library. Pick the vial for injection-route designs that follow the published mouse work, and the capsules only when oral exposure is the variable. Both are sold for laboratory research only.