ACE-031 vs MK-677
Which should you choose? Here's what you need to know.
The short answer
ACE-031 and MK-677 are both growth hormone peptides, but they work differently. Also called Ibutamoren. Taken orally rather than injected, it tells the body to release more growth hormone. Technically a secretagogue, not a peptide, but sold alongside them everywhere. Compare vendor pricing and availability below.
On 20 Sep 2026 Peptide Compare tracked 7 vendors selling ACE-031, cheapest in stock $88.00 per mg at Ruo Bio, and 8 selling MK-677, cheapest $2.00 per mg at Soma Chems.
ACE-031
Growth HormoneMK-677
Growth HormoneAlso called Ibutamoren. Taken orally rather than injected, it tells the body to release more growth hormone. Technically a secretagogue, not a peptide, but sold alongside them everywhere.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Sep 20, 2026.
ACE-031
MK-677
$70.99
Starting from
$59.99
$305.62
Avg. price per mg
$7.63
7
Vendors selling it
8
4 options
In stock now
9 options
7.6/10
Top trust score
7.0/10
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Where does this data come from?
We re-check vendor prices continuously and score vendors on Finnrick blind-test results — samples bought anonymously and sent to a lab, not vendor claims. No vendor can pay to rank higher. See our full methodology.