Protocol · Fitness & Performance
Muscle Size & Strength (Hypertrophy) Protocol
Creatine Monohydrate and Protein (Whey/Casein) are the core of this stack, with 4 supporting supplements. Each row gives the amount the protocol lists and the grade our evidence database holds for that supplement in Muscle Size & Strength (Hypertrophy).
We are re-verifying the studies cited on protocol pages; only confirmed citations are shown.
The stack
6 supplements · 6 graded · 5 confirmed studies
| Grade | Supplement | Amount listed | Why it’s in the stack | Evidence on file | Shop |
|---|---|---|---|---|---|
| Primary stackThe core of this protocol | |||||
| Creatine Monohydrate | Amount listed: 3–5 g daily (loading phase optional: 20 g/day for 5–7 days) | Increases phosphocreatine stores for ATP regeneration, enhances training capacity, and promotes cell volumization
| Grade B for Anaerobic Capacity11 studies · 90 people | ||
Confirmed studies for Creatine Monohydrate (titles as PubMed lists them) | |||||
| Protein (Whey/Casein) | Amount listed: 1.6–2.2 g/kg body weight daily (20–40 g per meal) | Provides essential amino acids (especially leucine) to maximize muscle protein synthesis and support recovery
| Grade C for Anti-Oxidant Enzyme Profile30 people | ||
Confirmed studies for Protein (Whey/Casein) (titles as PubMed lists them) | |||||
| Supporting stackListed as additions to the core | |||||
| HMB (Beta-Hydroxy Beta-Methylbutyrate) | Amount listed: 3 g daily (1 g 3× daily) | Leucine metabolite that reduces muscle protein breakdown and supports lean mass gains
| Grade D for Anaerobic Capacity28 people | ||
| Beta-Alanine | Amount listed: 3–6 g daily (split doses to minimize tingling) | Increases muscle carnosine to buffer acid during high-intensity sets, allowing more training volume
| Grade D for Cortisol8 people | ||
| Ashwagandha | Amount listed: 300–600 mg standardized extract daily | Adaptogen that reduces cortisol, improves recovery, and enhances strength and muscle gains
| Grade B for Aerobic Exercise Metrics1 study · 226 people | ||
Confirmed studies for Ashwagandha (titles as PubMed lists them) | |||||
| Vitamin D | Amount listed: 2,000–5,000 IU daily (target 40–60 ng/mL) | Vitamin D receptors in muscle tissue regulate protein synthesis; deficiency impairs muscle function
| Grade C for Interleukin 51 study · 30 people | ||
Shop the evidence-backed picks
The collection holds the supplements we grade A or B for its theme, in third-party tested products where the catalog has them. It opens in our Fullscript store. You can look through it without signing in; Fullscript asks for a free account to order.
Or shop one supplement
The 2 supplements in this protocol graded A or B. Each opens third-party tested products, matched to the dose above where we can.
- Grade B
- Grade B
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How this protocol works
In plain language
Building muscle requires progressive resistance training plus adequate nutrition and recovery. While training provides the stimulus, supplements can enhance the muscle-building response and accelerate results. This protocol includes the most evidence-based supplements for muscle hypertrophy and strength.
- Creatine Monohydrate is the single most effective and well-researched supplement for increasing muscle mass and strength. It works by increasing your muscles' stores of phosphocreatine, which regenerates ATP (cellular energy) during intense exercise. This allows you to perform more reps, lift heavier weights, and recover faster between sets—all of which drive greater muscle growth. Studies consistently show 5-10% greater strength gains and 1-2 kg more lean mass over 8-12 weeks. It also promotes cell volumization (water drawn into muscle cells), which may directly stimulate protein synthesis.
- Protein is essential for muscle growth—you can't build muscle without adequate amino acids. The leucine content of protein is particularly important as it directly activates mTOR, the master regulator of muscle protein synthesis. Research shows 1.6-2.2g/kg body weight is optimal for muscle building, with 20-40g of high-quality protein per meal. Whey protein is rapidly absorbed (ideal post-workout), while casein provides sustained amino acid release.
- HMB is a metabolite of leucine that primarily works by reducing muscle protein breakdown. It's most effective for beginners, during caloric deficits, or when training volume is very high. It can help preserve muscle and support modest gains in lean mass.
- Beta-Alanine increases carnosine levels in muscles, which buffers the acid produced during high-rep sets. This allows you to push through more reps in the 8-15 range—exactly the rep range most important for hypertrophy. The famous tingling (paresthesia) is harmless.
- Ashwagandha is an adaptogen that reduces cortisol (a catabolic hormone) and improves recovery. Studies in resistance-trained individuals show significantly greater increases in strength and muscle size compared to placebo.
- Vitamin D deficiency impairs muscle function and is surprisingly common. Adequate vitamin D supports muscle protein synthesis and strength. If you're deficient, correcting it can meaningfully improve your training results.
Expected timeline: Creatine loading saturates muscles in 5-7 days; maintenance provides ongoing benefit. Protein effects are continuous with training. Beta-alanine requires 2-4 weeks to build carnosine stores. Ashwagandha benefits appear over 8-12 weeks.