Written by: Daniel Markey
Last updated: November, 2025
Intro: I wanted to know why some guys online seemed to be packing on slabs of muscle in just weeks… while others kept spinning their wheels. So I dove into TikTok, Instagram, and gym forums to uncover the 5 most viral muscle-building supplements of 2025 - and which ones actually live up to the hype.
Effectiveness: 95%
Safety: 80%
Price: €€
Overall Grade: 4.5/5
Everyone’s talking about MK-677 - and for good reason. It naturally boosts your body’s own growth hormone. Users report rapid lean gains (2-5 kgs in weeks), constant muscle fullness, bigger appetite for easier bulking, and deeper, more restorative sleep.
Yes, it can cause some hunger spikes or slight water retention, but most say the results are absolutely worth it.
Effectiveness: 50%
Safety: 100%
Price: €
Overall Grade: 4/5
Creatine is a classic - simple, proven, and backed by decades of research. It helps your muscles push harder, recover faster, and look slightly fuller from increased water retention.
Most lifters see early strength gains, but progress tends to level off once your body adapts. Still, it’s a solid foundation supplement - reliable, affordable, and worth keeping in your stack, even if it won’t change your physique overnight.
Effectiveness: 35%
Safety: 90%
Price: €€
Overall Grade: 2.5/5
Ashwagandha gets hyped on TikTok as a “natural testosterone booster,” but in reality, its effects on muscle growth are mild at best.
Yes, it may slightly lower stress and improve sleep 0 which can help indirectly - but it won’t make you noticeably bigger or stronger. Most users say they feel calmer or sleep deeper, yet see no visual difference in the mirror.
One Reddit user put it simply: “My sleep got better, but my muscles look exactly the same.”
Effectiveness: 30%
Safety: 80%
Price: €€
Overall Grade: 2/5
Tribulus Terrestris is another “natural test booster” that promises higher testosterone and more energy. The problem? The results are inconsistent and usually underwhelming.
Some men say they feel a small libido boost or slightly better workouts, but the majority notice no measurable muscle gain at all. It’s more of a mood enhancer than a physique changer.
Effectiveness: 25%
Safety: 85%
Price: €€€
Overall Grade: 2/5
You’ve probably seen these on Amazon - giant tubs claiming to “naturally boost HGH while you sleep.” Usually they’re just amino acid blends (arginine, ornithine, glycine).
The problem? At best, they might give you a tiny, temporary GH spike you wouldn’t even feel. At worst, they’re glorified sleep aids with a fancy label.
Guys online are brutally honest about these products: “Another ‘GH booster’ did nothing - sick of wasting cash.”
My #1 Pick For 2025: MK-677 Ibutamoren
After reviewing 5 different products that went viral on social media in 2025, I can say for sure that:
This Is The Best Choice For Muscle Growth
✓ Noticeable lean mass gains (2-5 kgs in weeks, while staying lean)
✓ 24/7 muscle fullness - looking pumped even outside the gym
✓ Appetite through the roof - finally letting hardgainers eat enough to grow
✓ Deep, restorative sleep that accelerates recovery
While creatine, L-arginine, and the usual “natty boosters” may have their place, none of them come close to what MK-677 delivers.
I gave MK-677 the top spot because it’s the only supplement that consistently pushes men past what they thought they are capable of, with visible, rapid results.
I’ll admit, I was skeptical at first. After years of wasting money on so-called “growth hacks,” I’d nearly given up on finding anything legit.
But then I started seeing transformation photos all over Reddit and TikTok. Guys who looked flat and stuck one month, then suddenly appeared bigger, leaner, and rested the next. Over and over, the same name popped up: MK-677.
Digging deeper, I found out MK-677 wasn’t some random herbal blend. It was a pharmaceutical compound developed in the 1990s by Merck as a treatment for frailty and muscle wasting.
Clinical studies showed it increased muscle mass, boosted IGF-1 levels, and even improved sleep in older adults.
The project was shelved - not because it didn’t work, but because it threatened to undercut Big Pharma’s insanely profitable HGH injections. Bodybuilders and gym bros eventually rediscovered it and started calling it the “Poor Man’s HGH.”
That’s when I decided: I had to try it.
Unlike protein powder or creatine, MK-677 doesn’t just support your diet or training - it flips a switch inside your body.
MK-677 is a growth hormone secretagogue, meaning it mimics ghrelin (the hunger hormone) and signals your pituitary to release more growth hormone and IGF-1.
Those two hormones are the master keys for:
✓ Building lean mass (muscle cells grow and repair faster)
✓ Deep, restorative sleep (when growth hormone is naturally highest)
✓ Recovery & joint health (connective tissues repair more efficiently)
✓ Muscle fullness & vascularity (thanks to glycogen and water in muscle cells)
The best part? Unlike other pharmaceuticals, MK-677 does not shut down testosterone production, doesn’t require injections, and doesn’t need Post Cycle Thereapy.
Everywhere I looked, men were reporting the same core benefits:
“I gained 5 kgs in 6 weeks while leaning out.”
“I wake up feeling rested for the first time in years.”
“My muscles look full and pumped 24/7.”
“I won’t bulk without MK anymore.”
These aren’t wild claims from marketing teams. They’re consistent logs from gym-goers, biohackers, and dads in their 30s and 40s who were stuck until MK-677 entered the picture.
No supplement is perfect, and MK-677 does come with a few things you need to know:
Hunger: Almost everyone feels a surge of appetite in the first 1–2 weeks. Smart users time their doses at night to manage cravings. For hardgainers, this is actually the biggest advantage.
Water retention: Some report mild bloating, but it’s manageable with proper hydration and diet.
Blood sugar sensitivity: Like anything that boosts GH/IGF-1, MK-677 can impact insulin. That’s why it’s key to dose responsibly and pair it with good nutrition.
Compared to the risks of anabolic steroids or €1,000/month HGH injections, these are minor trade-offs that most men gladly accept.
When it comes to muscle growth in 2025, MK-677 is in a league of its own.
Creatine and whey? Basic staples.
Test boosters and GH powders? Mostly hype.
MK-677? A proven, lab-tested secret weapon that taps into your body’s own growth hormone system to unlock mass gain, recovery, and sleep like nothing else on the market.
If you’re serious about building size this year, MK-677 isn’t just another supplement - it’s the supplement that truly does the job.
Where to get MK-677?
Personally, I recommend Biaxol Supplements - the most trusted source for research-grade MK-677.
✓ Third-party lab tested for purity and potency
✓ Fast, discreet worldwide shipping
✓ Backed by hundreds of verified reviews
✓ Secure checkout & flexible payment options