It depends on the beets.
Sugar beets do contain Betaine. It lowers homocysteine levels (increased levels indicate heart disease). There aren’t enough studies yet that shows increase of NO levels with sugar beet consumption.
You might be referring to Beet Root which is rich in dietary nitrogen in the form of nitrates. Nitrogen is such an important element that our bodies need a substantial amount of it. It’s found in amino acids (proteins have the nitrogen atom in the chain) and also in radicals like the Nitric Oxide. The pathway is Nitrate > Nitrite > Nitric
Even if you gulp down a lot of arginine or citrulline, if you don’t have enough nitrogen in the body to be converted into nitric oxide, it’s all useless. However, nitrates get converted faster as opposed to making the body manufacture nitrogen from proteins into nitrate then nitrite and finally Nitric.
It does lower blood pressure by allowing blood vessel expansion and it might help with ED related to unhealthy blood vessels.
"Men are gifted with two heads, sadly they do not
have enough blood to run
both at the same time" by anonymous