Muscle & strength
The Muscle & Strength Stack
Training and protein do 95% of it. One supplement helps. The rest is where people get sold.
For: Anyone building muscle who's tempted by the SARM-and-peptide aisle before nailing the basics.
The compounds thestackindex sells for muscle sit on top of a base that most people haven't built. Progressive resistance training, enough protein, enough sleep, and a slight energy surplus are the whole engine. Creatine is the one add-on that earns it. The prescription and frontier options are real but belong in an honest, clinician-guided conversation — not a starter stack.
Muscle is one of the most over-supplemented goals in fitness and one of the simplest to actually cause. The engine is progressive resistance training plus enough protein, running on sleep and enough food. That’s not the boring prelude to the real stack — it is the stack. Get it right and you will build muscle about as fast as your genetics allow.
On top of that, exactly one supplement clears the evidence bar: creatine, a few grams a day, cheap and well-studied. Caffeine can sharpen a session. Everything past that is where the money and the risk live. Testosterone is a legitimate treatment for diagnosed hypogonadism and a clinician’s call — not an anti-aging or physique hack for men with normal levels. Growth-hormone peptides are marketed relentlessly for muscle on evidence that, for healthy people, essentially doesn’t exist, and they carry real trade-offs. We include them so you can understand them honestly, not so you’ll add them. Build the base first; it’s the only part that reliably works.
The protocol
The backbone
Does the work. Build these first.- Strength Foundations A
The engine. Progressive overload across the major patterns, most sets taken close to failure, 2–4×/week.
- Protein Foundations B
~1.6 g/kg/day, spread across meals. Above that adds little.
- Nutrition Foundations B
A slight energy surplus to build; enough whole food to recover on.
- Sleep Foundations A
7+ hours — muscle is built during recovery, not just training.
Worth adding
A real, evidence-backed boost on top of the base.Understand, don't just add
Powerful or hyped — a clinician conversation, not a casual add.- Testosterone (TRT) Medications B
Only for diagnosed hypogonadism, under a clinician — not a physique shortcut for normal men.
- GH secretagogues Frontier D
Marketed hard for muscle; the anti-aging/physique evidence doesn't exist. Understand the risks before anyone touches this.
Build it in this order
- 1 Get a progressive training program you'll actually follow for months.
- 2 Hit a protein target and eat enough to recover and grow.
- 3 Protect sleep — it's where the adaptation happens.
- 4 Add creatine. That's the supplement conversation, more or less over.
What to skip
- Buying SARMs or peptides to skip the part where you train hard for a year.
- Chasing exotic protein timing windows while missing the daily total.
- Confusing a testosterone prescription for hypogonadism with recreational enhancement.