Highest effect
Creatine
Other
Impact
Highest effect
Typical dose:3–5 g / day
By saturating muscle phosphocreatine stores, it allows for more repetitions and heavier loads during resistance training. This enhanced workload is a powerful stimulus for muscle hypertrophy over time.
Vitamin D
Vitamin
Impact
Highest effect
Typical dose:1000–4000 IU / day
Vitamin D deficiency is common and can impair athletic performance and recovery. Ensuring adequate levels is a foundational step for creating a physiological environment that supports muscle growth.
High effect
Beta-Alanine
Amino Acid
Impact
High effect
Typical dose:3.2–6.4 g / day
This allows for more repetitions and sustained effort during typical hypertrophy-focused training sets (e.g., 8-15 reps). The cumulative increase in training volume directly contributes to greater muscle gain.
Caffeine
Other
Impact
High effect
Typical dose:150–400 mg / day
By making workouts feel easier and enabling greater force production, it allows for a higher quality training session. This directly translates to a more potent stimulus for muscle growth.
Casein Protein
Other
Impact
High effect
A priority of zero is incorrect for a high-quality protein like casein. This priority places it appropriately as a top-tier supplement, valuable for its sustained amino acid release profile that minimizes muscle protein breakdown, especially when taken pre-sleep.
Citrulline
Amino Acid
Impact
High effect
Typical dose:3–6 g / day
Improved blood flow can lead to better performance and a more significant 'pump' during workouts. It may also aid in recovery by reducing delayed onset muscle soreness (DOMS).
Moderate effect
Arginine
Amino Acid
Impact
Moderate effect
Typical dose:3–8 grams / day
While not a direct anabolic agent, Arginine contributes to muscle gain indirectly. Its role in boosting nitric oxide enhances blood flow, ensuring muscles receive ample oxygen, amino acids, and glucose necessary for repair and growth post-exercise. Furthermore, Arginine can stimulate the release of growth hormone (GH), which plays a significant role in muscle protein synthesis and tissue regeneration.
Magnesium
Mineral
Impact
Moderate effect
Typical dose:200–400 mg / day
Classifying magnesium as merely 'situational' understates its importance. As a vital cofactor for ATP metabolism and muscle function, adequate levels are a prerequisite for effective training. This change reflects its essential, supportive role that enables high-level performance and recovery.
Omega-3
Fatty Acid
Impact
Moderate effect
Typical dose:1–3 g / day
While crucial for managing inflammation and overall health, its impact on muscle gain is indirect and supportive. This priority places it correctly among other foundational health supplements that enable recovery, rather than with acute performance enhancers.
Potassium
Mineral
Impact
Moderate effect
As a key electrolyte, potassium is critical for nerve impulse transmission and muscle function. Sweat loss during intense exercise can deplete levels, impairing performance and recovery. Ensuring adequate intake prevents it from becoming a limiting factor in training quality.
Taurine
Amino Acid
Impact
Moderate effect
Taurine is a conditionally essential amino acid that acts as a cell volumizer, which is a signal for anabolism. It also functions as an antioxidant and membrane stabilizer, helping to mitigate muscle damage from intense training and reduce delayed onset muscle soreness (DOMS).
Situational effect
Alpha-GPC
Other
Impact
Situational effect
As a highly bioavailable source of choline, Alpha-GPC supports the production of the neurotransmitter acetylcholine, which is crucial for muscle contraction and force generation. This can lead to improved power output during resistance training, providing a stronger stimulus for hypertrophy.
Ashwagandha
Botanical
Impact
Situational effect
Typical dose:300–600 mg / day
By mitigating the negative effects of high cortisol from intense training and life stress, it can create a more favorable environment for growth. Some studies also show modest increases in strength and testosterone in beginners.
Betaine Anhydrous
Other
Impact
Situational effect
Typical dose:1.25–2.5 g / day
Its mechanisms may involve enhancing endogenous creatine synthesis and protecting cells from stress. While not as impactful as primary ergogenics, it can provide an additional edge in performance.
Zinc
Mineral
Impact
Situational effect
A priority of zero is incorrect for this essential mineral. This priority correctly positions zinc as a crucial supplement for athletes at risk of deficiency, thereby supporting the hormonal and immune systems necessary for optimal recovery and muscle growth.