SLU-PP-332: New Evidence & My Experience – Exercise in a Pill?
- Feb 18
- 4 min read
Updated: May 27
Featuring Tony Pemberton
SLU-PP-332 has rapidly become one of the most discussed “exercise mimetic” compounds in the longevity and performance world. But despite the hype, one question still matters more than anything else:
What is the right dose of SLU-PP-332?
After reviewing my own biomarker data across multiple cycles, tracking glucose and cardio performance in real time, and seeing what happens when people push doses far too high, I’ve become increasingly convinced that more is not always better with SLU-PP-332.
This article combines:
my February biomarker results,
my current SLU-PP-332 cycle,
new mechanistic evidence,
and real-world observations from people using much higher doses.
The goal isn’t hype. It’s understanding how SLU-PP-332 may affect mitochondrial function, glucose handling, oxidative metabolism, and nutrient demand when used in the real world.
What Is SLU-PP-332?
SLU-PP-332 is commonly discussed as a pan ERR agonist (estrogen-related receptor agonist), particularly influencing:
ERRα
mitochondrial biogenesis pathways
oxidative metabolism
PGC-1α signalling
In practical terms, this is why SLU-PP-332 is often described as an “exercise mimetic.”
Research has linked these pathways to:
improved fat oxidation,
enhanced endurance,
mitochondrial adaptation,
improved glucose handling,
and reductions in oxidative stress markers.
A recent human in-vitro study using skeletal muscle cells found SLU-PP-332:
reduced reactive oxygen species (ROS) by 37.7%,
increased glutathione by 117.4%,
and reduced cellular senescence markers.
The effects appeared linked to ERRα activation and downstream mitochondrial signalling pathways.
My February SLU-PP-332 Cycle: Biomarker Changes
Back in February, I ran a 30-day SLU-PP-332 cycle.
That cycle included:
oral SLU-PP-332,
injectable SLU-PP-332,
cardio tracking,
glucose monitoring,
and full biomarker analysis.
One of the most important mitochondrial markers I was tracking was DRP1 (Dynamin-related protein 1) — a marker associated with mitochondrial fission and fusion balance.
Before the cycle, my DRP1 marker was extremely elevated:
100th percentile
After the cycle:
it dropped to the 85th percentile
At the same time:
ATP5B improved from the 75th percentile down to the 53rd percentile,
suggesting less mitochondrial stress and inefficiency.
Importantly, TruDiagnostic later updated the optimal DRP1 reference zone closer to the 50th percentile, making the improvement look even more meaningful relative to the newer reference range.
Why Vitamin B2 & B5 Matter With SLU-PP-332
One pattern I keep noticing with SLU-PP-332 is that people running excessively high doses often show signs of increased cofactor demand — especially involving:
Vitamin B2 (riboflavin)
Vitamin B5 (pantothenic acid)
These nutrients are critical for:
fat oxidation,
electron transport chain efficiency,
Coenzyme A synthesis,
oxidative metabolism,
and mitochondrial energy production.
On my February cycle, despite supplementing:
400mg vitamin B2 daily
500mg vitamin B5 daily
my biomarkers only improved modestly:
B2: 50th → 61st percentile
B5: 44th → 52nd percentile
That suggests SLU-PP-332 may substantially increase metabolic demand for these cofactors.
High Dose SLU-PP-332: The Potential Pitfall
The strongest warning signs I’ve seen haven’t come from conservative dosing.
They came from people pushing SLU-PP-332 aggressively.
One individual who had recently completed a 50mg SLU-PP-332 cycle later showed:
Vitamin B5: 1st percentile
Vitamin B2: 7th percentile
DRP1: 100th percentile
I’ve also now seen similar patterns in someone running around 20mg:
Vitamin B5: 3rd percentile
Vitamin B2: 6th percentile
Again, this is not proof of causation.
But when multiple people running high doses show:
extremely depleted B-vitamin biomarkers,
alongside signs of mitochondrial “overspin,”
it strongly suggests that excessive oxidative drive may come at a cost.
This is why I increasingly believe:
the best SLU-PP-332 dose is probably the smallest effective dose.
My Current SLU-PP-332 Cycle (3mg Oral)
For my current cycle, I made several changes:
switched supplier,
slightly increased dose,
changed peptide sequencing,
and combined the protocol with SS-31.
This time I’m using:
3mg oral SLU-PP-332 from Elvian Labs
Alongside:
SS-31,
cardio tracking,
glucose monitoring,
and ongoing biomarker testing.
I’m currently around day 26 of the cycle.
SLU-PP-332 Experience: Glucose & Cardio Performance
One of the biggest differences this cycle has been glucose control.
My glucose markers are now some of the best I’ve ever seen:
HbA1c: 4.7% (28 mmol/mol)
This is notable because glucose regulation has historically been a weaker area for me.
Cardio performance has also remained consistently near personal-best territory throughout the cycle:
often hovering within 1% of PR output.
(correction 2026)
One of the most obvious subjective effects has been:
increased heat production,
increased sweating,
and a very noticeable rise in metabolic intensity during cardio.
The first day starting the cycle, the amount of sweat produced from just 20 minutes of cardio was honestly surprising.
Why I’m Combining SLU-PP-332 With SS-31
This cycle I changed my sequencing strategy.
Previously:
I ran mitochondrial enhancers sequentially.
Now:
I’m overlapping SS-31 and SLU-PP-332 together.
The reasoning is that:
SS-31 supports cardiolipin and mitochondrial membrane function,
while SLU-PP-332 drives oxidative metabolism and mitochondrial signalling.
Rather than competing, they may complement each other mechanistically.
Elvian Labs & SLU-PP-332 Quality
For this cycle, I sourced the oral SLU-PP-332 from Elvian Labs.
One thing I increasingly care about with mitochondrial compounds and peptides is:
purity testing,
sterility testing,
and consistency.
At Elvian Labs, current work includes:
purity testing,
microbial safety verification,
and sterility analysis for mitochondrial-focused compounds and peptides including SS-31.
For injectable SLU-PP-332 specifically, I previously mentioned Peptides of London, particularly because the injectable preparation dissolved very easily and produced a stable solution during testing.
Final Thoughts: SLU-PP-332 May Be Powerful — But Dose Matters
After multiple cycles, biomarker reviews, and seeing how other people respond, my opinion on SLU-PP-332 has become much more nuanced.
I no longer think the goal should be:
maximum dose,
maximum oxidation,
or “forum-style” extremes.
Instead, the goal should probably be:
controlled mitochondrial stimulation,
metabolic improvement,
and measurable adaptation without excessive cofactor depletion.
At lower, more pragmatic doses, SLU-PP-332 may offer:
improved glucose handling,
enhanced metabolic output,
improved mitochondrial signalling,
and better endurance adaptation.
But push it too far, and the biomarkers may start suggesting:
oxidative overspin,
B-vitamin depletion,
and mitochondrial stress.
That’s why I believe the smartest way to use SLU-PP-332 is:
conservative dosing,
ongoing biomarker tracking,
and using the smallest effective dose possible.
Disclaimer
The compounds referenced in this article were sourced personally by the author for research and educational discussion purposes only.
References to Elvian Labs and Peptides of London are provided transparently regarding sourcing and testing practices and do not constitute medical recommendations or endorsements.
Epic Genetics does not prescribe, recommend, or supply prescription-only medications.
The information presented is for educational and informational purposes only and should not be interpreted as medical advice. Individuals should consult an appropriately qualified healthcare professional before making health-related decisions involving peptides, research compounds, or pharmacological interventions.
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