Creatine Monohydrate vs EAAs (Essential Amino Acids)

Mechanism

Creatine is phosphorylated by creatine kinase to phosphocreatine (PCr), which serves as a rapid phosphate donor to regenerate ATP from ADP during high-intensity, short-duration activity (the phosphagen energy system). This extends maximal effort capacity by 10-20%. Beyond energy, creatine enhances satellite cell activation and myonuclear addition, increases intracellular water retention (cell volumization signals anabolism), upregulates IGF-1 locally in muscle, enhances glycogen supercompensation, and crosses the blood-brain barrier where it supports cognitive function under stress (brain PCr buffer). It also acts as a direct antioxidant, scavenging reactive oxygen species.

Standard Dosing

5g daily (no loading necessary, but loading is faster)

Timing

Post-workout with carbohydrates and protein for optimal uptake (insulin-mediated GLUT4/creatine transporter co-localization). On rest days, any time with a meal. Dissolve in warm water for solubility.

Cycle Duration

ongoing (no cycling necessary — the 'cycling creatine' myth has been debunked)

Side Effects

• Weight gain (1-3 kg from water retention — intracellular, not bloat)
• GI discomfort at high doses
• Muscle cramping (anecdotal, not confirmed in controlled trials)
• Elevated serum creatinine (expected, benign — not indicative of renal damage)

Contraindications

• Pre-existing renal disease (creatinine levels will rise, which is expected and does not indicate kidney damage in healthy individuals)
• Rare: renal tubular disorders

Best Stacking Partners

Mechanism

The 9 essential amino acids (leucine, isoleucine, valine, lysine, methionine, phenylalanine, threonine, tryptophan, histidine) cannot be synthesized endogenously and must be consumed. Leucine is the primary mTORC1 activator (via Sestrin2 and CASTOR1 sensors), triggering p70S6K and 4E-BP1 phosphorylation to initiate muscle protein synthesis (MPS). The remaining EAAs are required as substrates for the actual protein synthesis — leucine signals the process, but all 9 EAAs must be present to complete it. EAA supplementation achieves comparable MPS stimulation to whey protein with fewer total calories.

Standard Dosing

6-12g per serving

Timing

Intra-workout (sipped during training) or immediately post-workout. Can also be used between meals to maintain elevated MPS throughout the day.

Cycle Duration

ongoing during training periods

Side Effects

• Mild GI discomfort
• Nausea (if concentrated)
• Bloating
• Generally very well tolerated

Contraindications

• Maple syrup urine disease (branched-chain amino acid metabolism disorder)
• Phenylketonuria (phenylalanine content)
• Severe renal disease

Best Stacking Partners