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L-Arginine Fails in Type 1 Diabetes


While animal studies have indicated a potential role for L-arginine in improving endothelial function in diabetes, a just-published study shows that it provides no benefit in patients with type 1 diabetes mellitus. Atorvastatin (Lipitor—Pfizer) improved endothelial function, but L-arginine supplementation may in fact interfere with the benefits of statin therapy.


Mullen MJ et al. Atorvastatin but not L-arginine improves endothelial function in type I diabetes mellitus: a double-blind study. J Am Coll Cardiol. 2000;36:410–6.