New HDHI ProArgi-9+ Study

Friday, November 23, 2012

A recent ProArgi-9+ study, conducted at the High Desert Heart Institute in Victorville, CA, measured the effectiveness of L-arginine on lactic acid buildup during high-intensity exercise.

What is Lactic Acid?

Lactic acid, known as lactate, is a natural byproduct in the body when there is insufficient oxygen present during energy (ATP) synthesis. This is most noted by a burning sensation in the muscles during high-intensity exercise. This serves as a natural defense mechanism for the body, as it prevents permanent damage during extreme exertion where an oxygen deficit is present.

The presence of lactic acid in tissue leads to muscle fatigue and decreases muscle performance.

Study Design

Siva Arunasalam, M.D., President and attending cardiologist at the High Desert Heart Institute, selected a test group consisting of 10 healthy subjects, ranging from 22-60 years of age.


Hypothesis: If L-Arginine increases muscle blood flow, then there will be less lactic acid accumulation. The result of less lactic acid accumulation would therefore increase endurance and decrease muscle recovery time.

Study Results 

The results of the study were significant for healthy individuals who participate in vigorous, high-intensity exercise and consume ProArgi-9+ Active.

Click here to download a PDF version of the study summary and results >>
Click here to download Dr. Siva Arunasalam's ProArgi-9+ Active PowerPoint >>


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