I used to think this until I read that "supplements" contain real sildenafil.

ChrisMarshallNY 4 hours ago | parent | next [-]

Supplements are pretty much unregulated, and can have some fairly scary ingredients. The regulators generally don't mess with them, until someone (usually multiple someones) has a problem.

	▲	nradov 2 hours ago \| parent [-]
		Lots of dodgy nutritional supplements out there. Look for NSF Certified Safe for Sport products to be sure of what you're putting in your body. https://www.nsf.org/knowledge-library/importance-nsf-certifi... And buy direct from the manufacturer. If you order through a reseller like Amazon then there's always a risk of getting counterfeit products if someone tampered with the supply chain.

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pessimizer an hour ago | parent | prev [-]

I've heard that the main reason they can be dangerous is because they can contain way too much.