L-Valine L-Phenylalanine L-Arginine

L-Arginine/L-ARGININE_74-79-3.html">L-arginine may lower blood pressure because it is involved in the formation of nitric oxide. It may also result in indigestion, nausea, and headache.

L-Arginine 
Amino Acids" href="http://www.cnl-citrulline.com/L-Arginine/L-ARGININE_74-79-3.html">L-Arginine Amino Acids should not be used following a heart attack. If you have a history of heart disease, consult your doctor before taking L-arginine.

Higher doses of L-Arginine 
products" href="http://www.cnl-citrulline.com/L-Arginine/L-ARGININE_74-79-3.html">L-Arginine products can increase stomach acid, so it may worsen heartburn, ulcers, or digestive upset cause by medications. Arginine appears to increase stomach acid by stimulating the production of gastrin, a hormone that increases stomach acid.

L-arginine may also alter potassium levels, especially in people with liver disease. People with kidney disease and those who take ACE inhibitors or potassium sparing diuretics should not use supplemental L-arginine unless they are under professional supervision. It may also alter the levels of other chemicals and electrolytes in the body, such as chloride, sodium, and phosphate.

Arginine may increase blood sugar levels, so it shouldn't be used by people with diabetes unless under a doctor's supervision.

Pregnant and nursing women and children should not use supplemental L-arginine, as it's safety has not been established.

People with genital herpes should not take L-arginine because it may aggravate their symptoms.