L-Theanine

What It Is:
A naturally occurring amino acid from green tea that promotes calm alertness by increasing alpha-brain waves.

What It’s Used For:

• Smooths caffeine’s edge — less jittery energy

• Enhances focus and mental clarity

• Reduces anxiety and stress without drowsiness

Typical Dose:

• 100–200 mg with or just before caffeine

Side Effects:

• None known; extremely safe and well-tolerated

Why It’s Rated 3/5:
Great nootropic synergy with caffeine. Doesn’t raise energy itself but makes pre-workout focus feel cleaner and more controlled.