Marcus T.
“The first thing that actually delivers 99.9% absorption — I feel it.”
4.74
Based On 16,434+ Satisfied CustomersMK - 677 Series (Growth Hormone Support Complex)
- 3rd party tested
- Amino acid complex
- 99.9% Oral Bio-availability
- Naturally supports growth hormone pathway activity
- Helps maintain lean muscle tissue & recovery
- May improve deep sleep & overnight repair
- Supports skin, hair & nail quality
- Naturally supports a balanced appetite signal
- Trusted by clinicians, athletes & longevity enthusiasts
$69.90$149.5Amount saved $80
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⟨Clinicians' Choice⟩
268 clinicians share this on FrontrowMD without compensation.
30-Day 100% Money Back Guarantee
We're so confident you'll love it, take a full 30 days to decide.
"I'm in my 50s, but recover from workouts like I'm in my 20s again."
Gregory|Verified Customer
Real users, real results
It Helps. Hear From Real Users
16,434+
Happy customers
4.83
Based on 202 verified reviews
4.83
Based on 16,434+ reviews
"SwissAmino ended my years of bloating and frustration, giving me smooth digestion, easier weight management, and the confidence I thought I'd lost forever."
— Joana, verified customer
Read all reviewsThe Most Effective Growth Hormone Secretagogue for Muscle, Strength & Recovery
Lean Muscle Gains
MK-677 elevates natural GH and IGF-1, the two signals your body uses to build muscle. Users consistently report meaningful lean mass gains within the first 8–12 weeks.
Appetite Amplifier
By stimulating ghrelin, MK-677 sharply increases hunger — making it dramatically easier to hit the caloric surplus required for serious bulking phases.
Recover Faster
Elevated GH during deep sleep accelerates tissue repair. Most users notice they bounce back from heavy sessions in days, not weeks.
Get Stronger
More muscle, better recovery, and improved neuromuscular output translate into steady week-over-week PRs on the big lifts.
Improved Body Composition
GH supports fat metabolism while you add lean mass — helping you put on size without the soft, bloated look of traditional bulks.
Deeper Sleep, Bigger Gains
MK-677 deepens slow-wave sleep — the exact stage when GH peaks and muscle is built. Wake up recovered, train harder.
It Helps. Hear From Real Users.
16,434+
Happy Customers
4.83
"Six weeks on MK-677 and my recovery between sessions is genuinely half what it was. Sleep deeper, lean mass up."
Diego A. · Hybrid athlete, 32
"Tendinitis I'd been managing for 18 months is 80% gone. MK-677 has been the missing piece for my joints."
Marcus T. · CrossFit competitor, 29
"Skin, sleep, and recovery all noticeably better inside a month on MK-677. The first stack I've actually re-ordered."
Sophia R. · Pilates instructor, 41
"First thing in years that has changed how I feel the morning after long runs. MK-677 is not a placebo."
James L. · Marathon runner, 38
Oral MK-677 Series
What to Know
Oral Bioavailability
With 99.9% bioavailability when taken with food, the formula offers unparalleled absorption. The Arginine-stabilized form ensures maximum stability and effectiveness.
Convenience
Just take it with meals — no needles, no refrigeration, no protocols. Designed to fit seamlessly into your daily routine.
Superior Formula
Other peptides require injections to be effective. Our Arginine-stabilized form is uniquely designed for oral absorption — making supplementation the superior choice for daily use.
Third-Party Testing You Can Trust
We don't just make claims — we back them up. Independent labs verify every batch contains the Arginine-stabilized amino acid complex without harmful additives.
How MK-677 Outperforms a Standard Protein & Creatine Stack
Protein + Creatine
- Supplies raw building blocks for muscle
- Modest strength gains over months
- No effect on appetite or caloric intake
- No impact on sleep or natural GH release
MK-677 Series
- Elevates natural GH and IGF-1 around the clock
- Drives lean muscle gains within 8–12 weeks
- Sharply increases appetite — easier surplus
- Deepens slow-wave sleep for full recovery
- Faster between-session recovery
- Steady strength PRs week over week
What to Expect on the MK-677 Series
A natural progression — appetite and sleep first, then visible muscle and strength.
01
Weeks 1–2
- Noticeable jump in appetite
- Deeper, more restorative sleep
- Mild water retention as GH rises
- Wake up feeling more recovered
02
Weeks 3–6
- Visible fullness in muscle bellies
- Faster recovery between sessions
- Steady strength progression
- Improved skin and nail quality
03
Weeks 7–12
- Measurable lean mass gains
- Consistent PRs on the big lifts
- Improved body composition
- Sustained GH/IGF-1 elevation
Us vs. the replicas
Spot the difference.
Feature
MK-677 Series
Typical brand
Bioavailable amino acid complex
Yes — clinical dose
Generic blends
3rd-party HPLC purity testing
Every batch, public
Rarely disclosed
Heavy metal screening
Below FDA thresholds
Often untested
Manufactured in FDA-registered facility
United States
Unknown origin
Stimulants & banned substances
Zero
Often present
Money-back guarantee
30 days, no questions
Store credit only
Reported by customers
The numbers people send us back.
92%
reported faster recovery between workouts
94%
reported deeper sleep within 30 days
98%
would recommend the MK-677 Series to a friend
Science-Backed for Lean Muscle, Strength & Faster Recovery
Explore the peer-reviewed research behind MK-677.
"Oral MK-677 Increases Fat-Free Mass in Healthy Older Adults"
Nass et al., Annals of Internal Medicine (2008). Daily oral MK-677 for up to 2 years significantly increased fat-free mass via sustained GH/IGF-1 elevation.
Link to study
"Stimulation of the GH–IGF-1 Axis by Daily Oral MK-677"
Chapman et al., JCEM (1996). Once-daily oral dosing reliably elevated 24-hour GH and serum IGF-1 in healthy adults — without desensitization.
Link to study
"MK-677 Improves Sleep Quality in Young and Older Adults"
Copinschi et al., Neuroendocrinology (1997). Prolonged oral MK-677 increased stage IV (deep) sleep and REM duration — the windows where natural GH peaks.
Link to study
"Two-Month MK-677 Treatment Increases Appetite & Fat-Free Mass"
Svensson et al., JCEM (1998). In obese subjects, oral MK-677 produced a sustained increase in appetite, food intake and fat-free mass.
Link to study
"MK-677 Reverses Diet-Induced Protein Catabolism"
Murphy et al., JCEM (1998). MK-677 shifted calorie-restricted subjects back into positive nitrogen balance — the biochemical marker of net protein anabolism.
Link to study
"MK-677 Accelerates Functional Recovery After Hip Fracture"
Adunsky et al., Archives of Gerontology and Geriatrics (2011). Phase IIb RCT showed faster recovery of gait speed and functional capacity vs placebo.
Link to studyQuestions, answered
The honest FAQ.
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09/03/2025
Brynlee B.
My shoulder pain is finally manageable.
I've tried half a dozen things for a chronic shoulder issue and this is the first one I've actually felt worki…
08/27/2025
Kayla L.
My whole household is on it now.
Started with one bottle for me, ended up restocking for my husband and my brother. We keep them lined up on th…
07/04/2025
John R.
Has been working — 5 stars.
Okay I have had a shoulder rotator cuff issue for over a year. After about 4 weeks on this stack the pain drop…
05/27/2025
Felicity G.
Hands and forearms feel new.
Working the line for 8 hours a day, my hands and forearms are always aching. This is the first thing that's ac…
* These statements have not been evaluated by the Food and Drug Administration. This product is an amino acid dietary supplement and is not intended to diagnose, treat, cure, or prevent any disease. Consult your physician before starting any new supplement.