Peptide profile · Metabolic
SLU-PP-332
A groundbreaking exercise mimetic compound that tricks your body into thinking it's training for a marathon—boosting metabolism, burning fat, and building endurance without you ever having to hit the gym.
Written & reviewed by Michael Carroll · Research, Peptide Initiative
Typical dose
500 mcg - 1 mg
Half-life
Estimated 4-8 hours
Bioavailability
Moderate (oral); High (injection)
Molecular weight
290.3 g/mol
Evidence level
Strong preclinical
01 · Compound profile
Scientific & efficacy data
Molecular formula
C18H14N2O2
Primary benefits
Powerfully activates ERR receptors to boost mitochondrial function, energy expenditure, and fat oxidation—mimicking the metabolic effects of endurance exercise
Induces aerobic exercise genetic programs without physical exertion, increasing oxidative muscle fibers and endurance capacity
Reduces fat mass through enhanced metabolism rather than appetite suppression, supporting body composition improvements
Saint Louis University (later University of Florida)
Amino acid sequence
N/A (Small molecule, not a peptide)02 · Dosing
How much do I take?
500 mcg - 1 mg · once daily
Subcutaneous: A small injection into the fatty layer just under the skin — the same way insulin is given.
Bioavailability High — most of the dose reaches your bloodstream, just more gradually than an IV.
Best time to take
Morning dosing aligns with your body's natural metabolic rhythm. If taking before exercise, dose 30-60 minutes prior for optimal effect. Can also split doses between morning and early afternoon.
With food?
Can be taken with or without food. Some users prefer taking with a light meal to minimize any potential gastrointestinal discomfort.
If stacking
If combining with other metabolic compounds, space them out and start each one separately to identify individual effects. Some users stack with L-Carnitine for enhanced fat oxidation support.
＋ Increase if
- +You've used the starting dose for 2+ weeks with no issues
- +You're not noticing expected metabolic improvements
- +Your body weight and composition goals aren't progressing
－ Decrease if
- −You experience persistent GI discomfort
- −Energy levels become erratic or you feel overstimulated
- −Any unexpected side effects arise
- −Sleep quality deteriorates
✓ Signs of right dose
- ✓Improved exercise endurance and recovery
- ✓Gradual fat loss with maintained muscle
- ✓Stable energy throughout the day
- ✓Better overall metabolic markers if tested
Dosing Calculator
Calculate Your Exact Dose
Step 1: Peptide Weight
Find the weight printed on your peptide vial label
Look here!
The peptide weight is printed on the label
Look here!
The weight is on the label
Select Weight
Look for a number followed by 'mg' on the vial label (e.g., 5mg, 10mg)
03 · Suitability
Is this right for me?
Best for enhanced metabolic health & fat loss without extreme dieting
Best for
Metabolic Syndrome Warriors
If you're battling the frustrating combination of belly fat, blood sugar issues, and sluggish metabolism, SLU-PP-332 targets the exact pathways that go haywire in metabolic syndrome. It's like giving your metabolism a personal trainer that works 24/7.
Exercise-Limited Individuals
Injuries, disabilities, or conditions that prevent normal exercise don't have to mean giving up on metabolic health. SLU-PP-332 activates exercise pathways even when you can't hit the gym, potentially maintaining metabolic function during recovery periods.
Endurance Athletes Seeking an Edge
For those already training hard, SLU-PP-332 may amplify your body's natural adaptation to exercise. Research shows it synergizes with actual training, potentially helping you get more benefit from every workout.
Aging Adults Fighting Metabolic Decline
As we age, our mitochondria become less efficient and our metabolism slows. SLU-PP-332 targets the ERR receptors that control mitochondrial function, potentially helping maintain youthful metabolic capacity even as birthdays add up.
Consider alternatives if
Do not use if
Use with caution if
Not sure?
Compare SLU-PP-332 with similar peptides to find the best fit for your goals.
04 · Administration
How do I use it?
Oral · Subcutaneous injection
Reconstitution — what you need
Example
For injectable form: If you have a 10mg vial and add 2mL of bacteriostatic water, you get 5mg/mL concentration. Each 0.1mL (10 units) equals 500mcg of SLU-PP-332.
For a 500mcg dose at 5mg/mL: draw 0.1mL (10 units on a standard insulin syringe). For 1000mcg: draw 0.2mL (20 units).
Route
Subcutaneous injection (just under the skin) or oral administration—oral is the preferred and more researched route
Best sites
Technique
- 01Wash hands thoroughly with soap and water
- 02Clean injection site with alcohol swab, let air dry
- 03Pinch about an inch of skin
- 04Insert needle at 45-90 degree angle
- 05Push plunger slowly and steadily
- 06Wait 5 seconds, then remove needle and apply light pressure
Storage · before reconstitution
Store powder or tablets at room temperature (59-77°F / 15-25°C) in a cool, dry place away from direct sunlight. Refrigeration extends shelf life. Keep in original sealed container with desiccant if provided.
Storage · after reconstitution
If using injectable form, refrigerate at 36-46°F (2-8°C). Never freeze. Keep away from light. Oral forms should remain at room temperature in original packaging.
Signs of degradation
Sample daily schedule
05 · Safety
Is it safe?
3 common side effects · 1 serious
SLU-PP-332 has demonstrated a favorable safety profile in extensive preclinical studies. Mouse studies showed no severe adverse events even at relatively high doses, with researchers noting improvements in metabolic markers without negative effects on appetite, behavior, or organ function. The compound appears well-tolerated in animal models, though human clinical trials are still needed to fully establish its safety profile in people.
Most safety data comes from mouse studies conducted by Thomas Burris and colleagues at Saint Louis University and later the University of Florida. While preclinical results are encouraging, large-scale human clinical trials have not yet been completed. Always work with a healthcare provider when considering research compounds.
Common side effects · experienced by some users
Less common
These typically resolve with continued use or dose adjustment.
Stop and seek help if
- ×Any signs of allergic reaction—stop immediately
- ×Persistent GI issues that don't improve with dose adjustment
- ×Significant changes in heart rate or blood pressure
- ×Sleep problems that persist beyond the first week
- ×Any side effect that feels concerning or unusual
- ×Your research protocol or cycle is complete
SLU-PP-332 is a research compound, not an FDA-approved medication. Never start, stop, or change your dosing without guidance from a qualified healthcare provider. This information is for educational purposes only—not medical advice.
With other peptides
- ✓BPC-157 — Can be combined safely. BPC-157 focuses on tissue healing while SLU-PP-332 targets metabolism—different mechanisms that may complement each other.
- ✓TB-500 — Safe to combine. TB-500 supports tissue repair and recovery, which may complement the metabolic enhancement from SLU-PP-332.
- ✓GHK-Cu — Can be used together. GHK-Cu works on cellular regeneration through different pathways.
- !Semaglutide — Use caution—both affect metabolism and glucose. Combining may lead to excessive metabolic effects. Consult a physician.
With medications
- !Diabetes medications (metformin, insulin) — May compound glucose-lowering effects. Risk of hypoglycemia. Requires physician supervision and possible dose adjustment.
- !Thyroid medications (levothyroxine) — Both affect metabolism. Combination may cause excessive metabolic stimulation. Consult endocrinologist.
- ✓Blood pressure medications — Metabolic changes may affect cardiovascular parameters. Monitor blood pressure closely.
- ✓Statins — Generally considered safe to combine. Both may actually complement each other for metabolic health.
With supplements
- ✓L-Carnitine — Potentially synergistic—both support fat oxidation. A popular combination in metabolic protocols.
- ✓CoQ10 — Safe and potentially complementary. Both support mitochondrial function through different mechanisms.
- ✓Caffeine/Stimulants — Use caution—combining may lead to excessive stimulation or cardiovascular stress.
- ✓Berberine — Both affect glucose metabolism. May be synergistic but monitor blood sugar if combining.
06 · Effectiveness
How do I know it's working?
Strong preclinical · first signs week 1
Evidence level
Strong preclinical
(extensive animal studies)
How it works
Think of your cells like little factories that need power plants (mitochondria) to function. When you exercise regularly, your body builds more and better power plants, making you more energetic and efficient at burning fuel. SLU-PP-332 flips the same switches that exercise does—specifically targeting receptors called ERRs (estrogen-related receptors) that control your mitochondria and metabolism. It's like telling your body 'hey, we're training hard' even when you're sitting still. The result? Your metabolism revs up, you burn more fat, and your endurance improves—mimicking weeks of cardio training.
SLU-PP-332 is a synthetic pan-agonist of the estrogen-related receptor (ERR) family, with highest potency at ERRα (EC50 = 98 nM) and activity at ERRβ and ERRγ (EC50s = 230 and 430 nM respectively). ERRs are orphan nuclear receptors that regulate transcription of genes involved in mitochondrial biogenesis (PGC-1α pathway), oxidative phosphorylation, fatty acid β-oxidation, and the tricarboxylic acid (Krebs) cycle. Upon ERR activation, SLU-PP-332 induces expression of DNA damage-inducible transcript 4 (Ddit4) and increases type IIa oxidative skeletal muscle fiber content. The compound enhances mitochondrial respiration in skeletal myoblasts and increases whole-body energy expenditure without affecting appetite or food intake. ERRα activation specifically drives the acute aerobic exercise genetic program, and studies confirm that ERRα is critical for the exercise-enhancing effects. The compound demonstrates metabolic benefits including improved glucose homeostasis, enhanced insulin sensitivity, and reduced adiposity in models of diet-induced and genetic obesity.
What to expect
Week 1
What you might notice
- •Possible mild GI adjustment as body adapts
- •Subtle increase in energy levels
- •Perhaps feeling slightly warmer than usual
- •Many users notice nothing dramatic yet
What's normal
- •Mild stomach adjustment that improves daily
- •Slightly elevated energy, especially in mornings
- •No dramatic changes—the compound works gradually
What's next
- →Continue at starting dose if tolerating well
- →Stay hydrated and maintain regular eating
- →Track energy levels and any changes in a simple log
Weeks 2-4
What you might notice
- •More consistent energy throughout the day
- •Possibly improved exercise tolerance or endurance
- •Early changes in body composition may begin
- •Better recovery from physical activity
What's normal
- •Side effects typically resolve by now
- •Energy levels stabilize at new baseline
- •Exercise feels slightly easier
What's next
- →Consider increasing to standard dose if needed
- →Add or maintain regular exercise for synergistic effects
- →Continue monitoring body composition and energy
Weeks 5-8
What you might notice
- •More noticeable improvements in endurance
- •Visible changes in body composition (reduced fat)
- •Improved metabolic markers if tested
- •Enhanced exercise performance and recovery
What's normal
- •Consistent energy and endurance improvements
- •Gradual fat loss, especially with exercise
- •Feeling metabolically 'optimized'
What's next
- →Maintain protocol through completion
- →Consider bloodwork to track metabolic markers
- →Plan for post-cycle transition
Weeks 9-12+
What you might notice
- •Peak effects typically reached
- •Significant improvements in body composition
- •Notable enhancement in exercise capacity
- •Metabolic benefits may persist after stopping
What's normal
- •Plateauing of effects at higher doses
- •Maintained improvements with consistent use
- •Ready to cycle off or continue as protocol dictates
What's next
- →Complete your planned cycle
- →Some users take a break before another cycle
- →Maintain results through continued exercise and diet
Signs it's working · Metabolic Improvements
- ✓Increased energy and reduced fatigue during daily activities
- ✓Better exercise endurance—running farther, lasting longer
- ✓Gradual reduction in body fat, especially abdominal area
- ✓More stable blood sugar levels (if monitored)
- ✓Improved recovery after physical exertion
Signs it's working · Physical Performance
- ✓Workouts feel easier at the same intensity
- ✓Able to exercise longer before feeling exhausted
- ✓Faster return to baseline after intense activity
- ✓Improved cardiovascular endurance
- ✓Better metabolic flexibility during exercise
Signs it's working · Measurable Markers (if tested)
- ✓Improved fasting glucose or HbA1c levels
- ✓Better lipid profile (cholesterol, triglycerides)
- ✓Reduced inflammatory markers
- ✓Improved insulin sensitivity on testing
- ✓Changes in body composition measurements
Not seeing results? Common reasons
- •Expecting overnight results—SLU-PP-332 works gradually over weeks, not days
- •Not combining with any physical activity—while it works without exercise, effects are amplified when combined with training
- •Poor quality compound from unreliable source—always verify third-party testing
- •Inconsistent dosing or missing doses—regular administration is key
- •Diet undermining results—you can't out-metabolize a terrible diet
- •Unrealistic expectations—this isn't a magic pill, it's a metabolic enhancer that requires patience
Key research
07 · Questions
Frequently asked
Is SLU-PP-332 actually a peptide?+
Technically no—it's a small molecule compound, not a peptide made of amino acids. However, it's often grouped with peptides in the metabolic enhancement category because it targets similar goals and is used in similar research contexts. The 'PP' in its name stands for the chemical class, not peptide.
Can I really get exercise benefits without exercising?+
Research shows SLU-PP-332 activates the same metabolic pathways as exercise—but here's the exciting part: it works even better when combined with actual exercise. The compound synergizes with training, so you get amplified results. Think of it as a metabolic booster that enhances whatever exercise you can do, or provides baseline benefits if you can't exercise at all.
Will this help me lose weight?+
Mouse studies show significant fat mass reduction without changes in appetite or food intake. The weight loss comes from increased metabolism and fat burning, not from eating less. However, human studies are still needed, and results will vary based on diet, activity level, and individual factors.
How is this different from other metabolic compounds like Cardarine?+
SLU-PP-332 works through ERR receptors, which are different from the PPAR-delta pathway that Cardarine targets. Both enhance endurance and metabolism, but through distinct mechanisms. Some researchers believe the ERR pathway may have a cleaner safety profile, though more human data is needed for both compounds.
Is this approved for human use?+
No, SLU-PP-332 is currently a research compound and has not completed human clinical trials. It's available only for research purposes. The science is promising, but we're still in the early stages of understanding its effects in humans.
Why would someone use this instead of just exercising?+
Great question! For healthy people who can exercise, the compound may enhance training results. But it's particularly interesting for people who can't exercise normally—those recovering from injuries, managing disabilities, dealing with conditions that limit physical activity, or elderly individuals at risk of muscle wasting.
Can I take this with other supplements?+
Many users combine SLU-PP-332 with mitochondrial support supplements like CoQ10, L-Carnitine, or NAD+ precursors. However, use caution combining with other strong metabolic compounds, diabetes medications, or stimulants. When in doubt, consult a healthcare provider.
How long do the effects last after I stop taking it?+
This is still being studied, but research suggests the metabolic adaptations (like increased mitochondria and oxidative muscle fibers) may persist for some time after stopping. However, maintaining regular exercise and healthy diet will be important for preserving benefits long-term.