"Superbeets" appears to be a brand name for a supplement of Beetroot extract. So first, if you want to go down this road, save your money and buy either beetroot juice or solid beetroot.
Here's a link that talks about
Superbeets and blood pressure, along with a blurb (quoted below) about
Prostate Cancer Cell growth...
https://www.healthline.com/nutrition/superbeets#blood-pressure"May Protect Against Cancer
Compounds in beets may help prevent cancer.
A test-tube study found that a compound in beetroot extract decreased the growth of prostate cancer cells by 12.5% in one week (13Trusted Source).
When combined with a common anticancer drug, this same compound increased the effectiveness of the drug against prostate, breast and pancreatic cancer cells (13Trusted Source, 14Trusted Sou
In addition, a study on rats found that water containing beetroot-derived food coloring reduced the development of esophageal cancer by 45% (15Trusted Source).
The cancer-fighting effects of beetroot have only been shown in test-tube and animal studies. Human studies are needed, as well as specific research on SuperBeets.And here's a comment on Beets andTestosterone, from an article on Prostate.net :
https://prostate.net/articles/6-foods-naturally-boost-testosterone/" In terms of testosterone, beets are high in the mineral boron. Boron is essential for testosterone production and raising levels of free testosterone."All this stuff, like most diet affects on PCa and related issues, shows some evidence but its not scientifically proven stuff.