Citrulline
A blood flow enhancer that works as a nitric oxide booster, causing noticeable stimulant-like effects and physical pump.
Videos Mentioning Citrulline

Dr. Andy Galpin: The Optimal Diet, Supplement, & Recovery Protocol for Peak Performance
FoundMyFitness
A blood flow enhancer that works as a nitric oxide booster, causing noticeable stimulant-like effects and physical pump.

Q&A Extravaganza (Episode 58)
Stronger By Science
A supplement that, when combined with dietary nitrate, could be a cost-effective strategy for strength and muscle, but requires better-designed studies.

Science of Muscle Growth, Increasing Strength & Muscular Recovery
Andrew Huberman
An amino acid that, along with arginine, can improve performance for long bouts of exercise by promoting vasodilation and increased blood flow, but may increase cold sore outbreaks.

Dr. Andy Galpin: Optimal Nutrition & Supplementation for Fitness | Huberman Lab Guest Series
Andrew Huberman
A non-stimulant performance enhancer that works through the arginine-nitric oxide pathway, causing vasodilation. Caution is advised for individuals prone to cold sores due to its effect on the arginine pathway.