L-Citrulline (Pure Form)

What It Is:
A pure amino acid precursor to nitric oxide, improving blood flow and muscle endurance.

What It’s Used For:

• Enhances muscle pumps

• Boosts endurance and oxygen delivery

• Reduces fatigue and soreness

Typical Dose:

• 6–8 g pre-workout

Side Effects:

• Generally well tolerated; mild stomach upset in some users

Why It’s Rated 4/5:
Excellent pump and endurance support; more reliable than arginine and a staple in serious pre-workouts.