Rip:30 said:Loaded with nitrate.
This is a good point. Nitrates are used to preserve meat. The nitrates themselves are not the problem, it's the nitrosamines formed from them. This formation is inhibited by Vitamin C, which is where a diet rich in fruits and vegetables helps-- a source of nitrates in a form that reduces nitrosamines.
I guess that if you are going to drink a lot of beetroot juice, you want to take a lot of vitamin C, too. It should maximize the amount of NO produced and minimize the amount of nitrosamines. But this is also another reason to be concerned about chronic intake of large amounts of beetroot juice.