“81 percent of tested samples of over-the-counter male sexual enhancement products sold in the U.S and Asia” and Nigeria contained PDE5I- study from Journal of Sexual Medicine
- some of the supposedly “natural” products contain traces of phosphodiesterase-5-inhibitors (PDE5Is) which is a medication found in prescription drugs. Viagra which is commonly used in the treatment of impotence, also contains PDE5Is.
- some of the natural supplements showed promise for improving mild sexual dysfunction, but lacked robust human evidence.
- some of them showed no scientific evidence to support claims they can improve libido, erectile dysfunction or sexual performance.
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