MK-677 vs Sermorelin
Which should you choose? Here's what you need to know.
The short answer
MK-677 and Sermorelin 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. A growth hormone releasing hormone (GHRH) analog commonly prescribed in anti-aging clinics. One of the most established peptides for GH optimization. Compare vendor pricing and availability below.
On 19 Sep 2026 Peptide Compare tracked 8 vendors selling MK-677, cheapest in stock $2.00 per mg at Soma Chems, and 46 selling Sermorelin, cheapest $3.70 per mg at Step One.
MK-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.
Sermorelin
Growth HormoneA growth hormone releasing hormone (GHRH) analog commonly prescribed in anti-aging clinics. One of the most established peptides for GH optimization.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Sep 19, 2026.
MK-677
Sermorelin
$59.99
Starting from
$22.00
$7.63
Avg. price per mg
$8.60
8
Vendors selling it
46
9 options
In stock now
52 options
7.0/10
Top trust score
9.0/10
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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.