You're getting 500mg each of **L-Arginine** and **L-Citrulline** per two-capsule serving — but the clinical research on blood flow and exercise performance uses 2,000–6,000mg of arginine and 3,000–6,000mg of citrulline. At these doses, you're at roughly 25% and 17% of the minimum studied amounts, which is well below the range where meaningful nitric oxide support has been demonstrated.

The ingredient pairing itself is sound — your body converts citrulline into arginine in the kidneys, which can sustain nitric oxide levels longer than arginine alone. But that synergy only kicks in at higher doses. At 500mg each, neither ingredient reaches the threshold where clinical benefits for heart health or workout performance have been observed.

To reach even the low end of the studied dose for arginine alone, you'd need to take eight capsules daily — four times the label's recommendation. That makes this a starting point at best, not a clinically effective dose.