Not medical advice. I am a software engineer, not a physician. This page documents my own protocol and the research I read while building it. Talk to a qualified clinician before changing your supplementation, diet or any treatment. Lab reference ranges quoted here vary by laboratory and by individual.
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Skeletal muscle is the body's largest organ by mass, comprising 30-40% of total body weight. Far from being merely structural, muscle is a metabolic organ: it is the primary site of glucose disposal (accounting for ~80% of insulin-stimulated glucose uptake), a reservoir of amino acids for immune function and wound healing, and a major contributor to basal metabolic rate. Loss of muscle mass (sarcopenia) is one of the strongest predictors of all-cause mortality, disability, and metabolic disease in aging populations.
Building and maintaining muscle requires three elements: mechanical tension (resistance training), adequate protein and amino acids (especially leucine), and a hormonal environment that favors anabolism over catabolism. Testosterone, IGF-1, and insulin are the primary anabolic signals, while cortisol and chronic inflammation drive muscle breakdown.
Muscle as a metabolic organ: Each kilogram of muscle burns approximately 13 kcal/day at rest. More importantly, muscle is the primary sink for blood glucose after meals. Insulin resistance in muscle tissue is one of the earliest detectable signs of type 2 diabetes — often years before fasting glucose becomes abnormal. Resistance training and muscle mass preservation are among the most effective strategies for metabolic health.
Muscle growth (hypertrophy) occurs when the rate of muscle protein synthesis (MPS) exceeds muscle protein breakdown (MPB) over time. This process is regulated by the mTOR signaling pathway, which integrates signals from mechanical loading, amino acid availability, and hormonal status.
Kreider, R. B., et al. (2017). International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation. J Int Soc Sports Nutr, 14, 18. PubMed 28615996
These supplements address different aspects of muscle performance: energy availability, protein synthesis stimulation, anti-catabolic protection, and recovery optimization.
| Supplement | Role | Timing | Details |
|---|---|---|---|
| Creatine Monohydrate | Increases phosphocreatine stores; improves power output and hypertrophy | 5 g/day, any time (consistency matters more than timing) | Creatine |
| HMB (beta-Hydroxy beta-Methylbutyrate) | Reduces muscle protein breakdown; most effective during caloric deficit or detraining | 3 g/day split into 3 doses with meals | HMB |
| Protein (Whey/Casein) | Provides leucine and essential amino acids for MPS; 1.6-2.2 g/kg/day total intake | 30-50 g per meal, 3-4x/day | Supplement Stack |
| L-Glutamine | Supports recovery, gut barrier integrity, and immune function during intense training | 5-10 g/day, post-workout or before bed | L-Glutamine |
| Magnesium (Glycinate or Threonate) | Essential for muscle relaxation, ATP metabolism, and sleep quality | 200-400 mg elemental Mg/day, evening | Magnesium Glycinate |
Creatine is the most evidence-backed supplement: Over 500 peer-reviewed studies confirm creatine monohydrate's benefits for strength (+5-10%), lean mass (+1-2 kg over 4-12 weeks), and exercise capacity. Long-term use is well studied and does not impair kidney function in healthy people — but if you have existing kidney disease, talk to your doctor before starting. and also provides cognitive benefits.
Morton, R. W., et al. (2018). A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength. Br J Sports Med, 52(6), 376-384. PubMed 28698222
Muscle growth is ultimately driven by hormonal signals and limited by inflammation and metabolic dysfunction. These lab tests reveal whether your body's anabolic environment supports muscle building.
| Test | What It Measures | Frequency | Details |
|---|---|---|---|
| Total Testosterone | Primary anabolic hormone; drives MPS, satellite cell activation, and nitrogen retention | Every 6-12 months | Lab Tests |
| Free Testosterone | Bioavailable testosterone (not bound to SHBG); the fraction that actually activates androgen receptors in muscle | Every 6-12 months | Lab Tests |
| IGF-1 (Insulin-like Growth Factor 1) | Mediates growth hormone's anabolic effects; stimulates satellite cell proliferation and muscle repair | Every 12 months | Lab Tests |
| Creatinine | Byproduct of creatine metabolism in muscle; higher values (in context) reflect greater muscle mass | Every 12 months | Lab Tests |
| CRP (C-Reactive Protein) | Chronic inflammation marker; elevated CRP impairs MPS and accelerates muscle protein breakdown | Every 6-12 months | Lab Tests |
Testosterone is the master anabolic signal: Men with total testosterone below 300 ng/dL experience measurably impaired muscle protein synthesis, reduced satellite cell activation, and accelerated sarcopenia. Free testosterone is even more informative — if SHBG is elevated (common with aging, low-carb diets, or thyroid dysfunction), total T can appear normal while bioavailable T is critically low.
Creatine confirmed for sarcopenia prevention in meta-analyses. Two 2025 systematic reviews and meta-analyses confirmed that creatine monohydrate at 5+ g/day combined with resistance training significantly increases muscle strength and lean tissue mass in older adults, with the strongest evidence for interventions lasting up to 32 weeks. The International Society of Sports Nutrition now positions CrM at ≥3 g/day as a viable intervention for improving strength, lean mass, regional muscle size, muscle density, and functional ability in aging populations. Importantly, creatine's benefits extend beyond muscle: a 2025 narrative review in Frontiers in Nutrition documents its dual functionality in both muscle and cerebral energetics, suggesting creatine may simultaneously prevent sarcopenia and reduce neurodegenerative disease risk.