Proof.Fit

Essential Amino Acids

19 benefits mapped to clinical evidence across supplements.

Benefit Evidence

Main Effects
Tissue repair

Anabolism +MPS

Repair+healing -inflammation

+10% balance

Strong
13,290
Illness recovery

Protein markers + stay

Glutamine/arginine: less catabolism

Leucine/EAA: more anabolism

Strong
10,653
Body composition

Amino retention +15%

Lean mass +2.5kg

Muscle breakdown ↓

Strong
9,626
Healthy aging

Muscle/anabolic: +612g

Bone/vascular: improved

Metabolic/AA: choline−30%

Strong
8,058
Muscle growth

Leucine/EAA boost MPS +22%

Lean mass/strength gains

Strong
8,457
Immune support

Immune markers + infections

T-cell support + less infection

Inflammation down, immunity up

Strong
8,201
Metabolism

AA uptake↑ / glucose↔

L-Arg/Leu metabolism↑

Liver fat↓ insulin↑

Strong
8,466
Strength

MPS/lean mass +

Strength/function +

Strong
3,517
Workout performance

Blood flow+performance

Muscle-sparing strength+mass

Strong
2,792
Mood balance

TRP↓ mood↓

TRP↑ mood↑

Strong
2,678
Weight management

Fat loss/satiety + lipolysis

Weight gain/muscle preservation

Strong
2,540
Muscle soreness

Muscle soreness ↓13 mm

Muscle soreness ↓

Strong
2,185
Skin appearance

Dryness/hydration ↓

Wrinkles/brightness ↑

Strong
1,360
Appetite suppression

Whey/AA ↑ satiety hormones

Trp/Phe ↓ intake 10-20%

Strong
799
Energy & Fatigue

Work/fatigue +19-22%

Dyspnea/walk +50m

Energy intake +793 kcal

Strong
1,085
Focus & concentration

Speed/attention +13-18s

Memory/executive +11-27%

Strong
1,073
Endurance

Blood flow/endurance +14%

Fatigue/muscle loss -14%

Moderate
645
Sleep quality

Sleep quality ↑

+84 min sleep

+6.6% efficiency

Moderate
708
Hair & Nails

Hair growth +1.01

Good tolerability

Weak
83