Some supplements sold for erectile dysfunction contain ingredients that are the same or similar to Viagra and Levitra

Some supplements sold for erectile dysfunction contain ingredients that are the same or similar to Viagra and Levitra.

These compounds have been found in Zimaxx, Libidus, Neophase, Nasutra, Vigor-25, Actra-Rx, and 4Everon.

And, of course, they aren't listed on the labels.

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