Essential Amino Acids (EAAs) especially Leucine acts as a precursor to protein production (muscle protein synthesis)
Essential Amino Acids (EAAs) especially Leucine acts as a precursor to protein production (muscle protein synthesis)
Proteins are built from amino acids, and the body cannot make the 9 essential amino acids on its own.
EAAs, particularly leucine, directly stimulate mTOR, the pathway that turns on muscle protein synthesis (MPS).
Without sufficient leucine or EAAs, your body cannot build new muscle protein effectively.
Most complete precursor because they supply all 9 essential amino acids.
Benefits:
Useful when training fasted or with low protein intake
If you want the single most powerful trigger:
Leucine is the primary activator of muscle protein synthesis
~2–3 grams is the “leucine threshold” most people need to hit to stimulate MPS
Often used as:
These include leucine, isoleucine, and valine.
But:
BCAAs are not enough alone to build muscle tissue, because you still need all 9 EAAs.
EAAs are superior.
A leucine metabolite that:
Sometimes used in older adults or during heavy calorie restriction
But: EAAs or leucine are more direct precursors.
If your goal is protein production / muscle protein synthesis, the best direct precursor supplement is:
→ Complete building blocks for muscle protein synthesis (MPS)
→ Works even if you haven’t eaten enough protein that day
→ Stimulates MPS and provides substrate to build new tissue
Better for HRV improvement (less muscle breakdown = lower stress)
→ But cannot complete MPS without the other 6 EAAs
Helps reduce central fatigue in long endurance sessions
Can actually lower other amino acid levels in the bloodstream
Inferior for strength, VO₂ max progress, longevity, and HRV
For anyone over 40, training hard, or focused on longevity → EAAs outperform BCAAs in every category except taste.
(Based on your VO₂ max, HRV, rowing focus, and longevity stack.)
Ideal leucine content per dose:
2.5–3 g leucine (This hits the anabolic threshold)
These sessions create the highest muscle stress and mitochondrial turnover.
Best timing:
Zone 2 preserves mitochondria, improves HRV, and is minimally catabolic.
If fed, no EAAs required.
(BCAAs won’t protect muscle in long fasted sessions.)
Your HRV drops mainly from:
Improves HRV indirectly via:
Best timing:
5 g during or after hardest workout of the day
Meaning: you need more leucine to stimulate muscle building.
Daily baseline (rest days):
Taken once in the morning or with low-protein meals
Use only in 2 situations:
1. Long endurance events >90 min where central fatigue matters
2. You’ve already eaten a high-protein meal and just want a small boost
Dose:
But again: EAAs outperform them.
Best Overall Formula for You:
Given your goals (VO₂ max + rowing + HRV + longevity):
This gives:
THE OPTIMAL SUPPLEMENT STACK (Your Protocol Version)
Dose:
5 g on rest days (morning)
Why:
Preserves muscle during VO₂ max + zone 2 sessions
Dose:
Why:
Improves cognition and neuroprotection (longevity benefit)
Take it anytime. With or without food.
Dose:
3.2–4 g daily, split into 2 doses to reduce tingles
Why:
Raises muscle carnosine → better lactate buffering
This is one of the strongest ergogenic for rowing.
Dose:
Why:
Reduces muscle cramping and improves power output
Daily:
Why:
Improves cardiac performance & rhythm stability
Dose:
Why:
Dose:
100 mcg K2 (MK-7)
Why:
Dose:
Why:
Dose:
Only on your hardest VO₂ max interval days.
Huge lactate-buffering effect.
Dose:
Why:
Dose:
Why:
THE SHORT VERSION (the simple core):
This stack alone will improve: