What Is an NO2 Supplement?


Nitric oxide (NO2)supplements are muscle enhancers that dilate blood vessels and increase blood flow. Purveyors claim this helps help increase muscle mass. A surprising byproduct is often an increased libido.


  • Nitric oxide was originally discovered in the 1980s. Scientists were studying a gas that was only present for a split second while a muscle contracted and blood vessels dilated.


  • When you exercise, nitric oxide is released, causing blood to flow more freely during the exercise. This so-called “pump” is temporary. Manufacturers behind NO2 claim their product includes an extended delivery system, they call “pHyser3” which allows you to produce nitric oxide even when you’re not working out.


  • Manufacturers claim NO2 generates perpetual pumps, amplifies growth signals, accelerates fast twitch strength and increases endurance. They also maintain that these supplements lead to huge gains in lean mass and strength gains as well as faster recovery time after workouts.


  • According to the manufacturers, men who have taken NO2 report they felt an increase in both ejaculatory and erectile strength.

Side Effects

  • NO2 contains arginine; and high doses of this amino acid may be toxic. Overuse can also lead to diarrhea and nausea.


  • According to manufacturers, if you weigh less than 120 pounds, you should take two caplets 30 minutes before breakfast and lunch. If you weigh 120 to 160 pounds, you can take three caplets before breakfast and lunch. If you weigh 160 to 200 pounds you should take four caplets before breakfast and lunch and if you weight more than 200 pounds you can increase the dosage to five caplets before both meals.

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