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Follistatin 344 vs PEG-MGF
Follistatin 344 and PEG-MGF are both muscle / growth peptides, which is why they get recommended interchangeably — but they are different compounds with different origins. The table below sets out the differences. We give no dosing guidance.
Side by side, in plain English — what each one is, where they overlap and where they genuinely differ.
Follistatin 344Muscle / Growth
PEG-MGFMuscle / GrowthAt a glance
| Follistatin 344 | PEG-MGF | |
|---|---|---|
| Category | Muscle / Growth | Muscle / Growth |
| Typical route | SubQ (or IM at site) | SubQ (post-workout) |
| Shelf life once mixed | ~30 days | ~30 days |
| Commonly reported effects | Muscle growth Reduced myostatin Fat loss | Muscle repair Satellite cell activation Recovery |
| Reported considerations | Joint pain Possible organ growth if abused | Rare injection site reaction |
The differences that actually matter
Both are classed as Muscle / Growth peptides, so they get compared constantly and are often researched for overlapping reasons.
Route of administration differs — Follistatin 344 is typically subq (or im at site), PEG-MGF is typically subq (post-workout). That alone changes how convenient each one is to keep up with.
Where they overlap: muscle growth.
Reported mainly for Follistatin 344: reduced myostatin, fat loss.
Reported mainly for PEG-MGF: satellite cell activation, recovery.
What Follistatin 344 is
Follistatin 344 is a naturally occurring glycoprotein, with this specific isoform being a potent antagonist of myostatin. Myostatin is a growth differentiation factor belonging to the TGF-beta superfamily, primarily known for inhibiting muscle growth. Follistatin 344 binds directly to myostatin, thereby preventing myostatin from interacting with its receptors on muscle cells and signaling pathways that limit muscle development. This inhibition consequently reduces myostatin's negative regulatory effect, allowing fo
What PEG-MGF is
PEG-MGF, or Pegylated Mechano Growth Factor, is a modified splice variant of the Insulin-like Growth Factor-1 (IGF-1) family. It targets the IGF-1 receptor, primarily stimulating local muscle repair and growth processes. The pegylation, involving the attachment of polyethylene glycol, significantly extends its half-life and improves its stability in the body compared to its unpegylated counterpart. MGF is naturally produced in muscle tissue following damage or mechanical overload, where it plays a key role in activ
How to compare them for yourself
Anecdotes online are noisy because nobody is measuring the same thing. The only comparison that means anything is your own: log each entry with a timestamp, keep the vial ledger honest so you know what you actually got through, pick two or three metrics before you start, and look at the trend after several weeks rather than day to day.
Peptide Wizard does that part for you — Follistatin 344 and PEG-MGF are both in the built-in reference library with a 3D vial, and your history, vial ledger and cost per entry stay private on your device.
FAQ
What is the difference between Follistatin 344 and PEG-MGF?
Both are classed as Muscle / Growth peptides, so they get compared constantly and are often researched for overlapping reasons.
Can you log Follistatin 344 and PEG-MGF in the same period?
Plenty of people record more than one peptide at a time. Peptide Wizard keeps a separate vial ledger and entry history for each, so you can see exactly what overlapped and when — it does not recommend combinations or doses.
Which is better, Follistatin 344 or PEG-MGF?
There isn't a universal answer — reported responses vary a lot between individuals, which is why your own log is more informative than anyone else's anecdote. Track one variable at a time and compare your own metrics over several weeks.
Is this medical advice?
No. This page is educational reference material only. It contains no dosing guidance. Speak to a qualified healthcare professional before making any decisions.
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Educational reference only. This page contains no dosing guidance and is not medical advice.