According to healthline.com the 12 Health Benefits of Beetroot Juice:
Helps lower blood pressure
Improves exercise stamina
May improve muscle power in people with heart failure
May slow the progression of dementia
Helps you maintain a healthy weight
May prevent cancer
Good source of potassium
Good source of other minerals (calcium, iron, magnesium, manganese, phosphorous, sodium, zinc, copper, selenium)
Provides vitamin C
Supports your liver
Good source of folate
May reduce cholesterol
Your urine and stools may turn red or pinkish after eating beets. This condition, known as beeturia, is harmless. But it may be startling if you don’t expect it.
If you have low blood pressure, drinking beetroot juice regularly may increase the risk of your pressure dropping too low. Monitor your blood pressure carefully.
If you’re prone to calcium oxalate kidney stones, don’t drink beetroot juice. Beets are high in oxalates, which are naturally occurring substances that form crystals in your urine. They may lead to stones.
Beets are healthy no matter how you prepare them. But juicing beets is a superior way to enjoy them because cooking beets reduces their nutritional profile. If you don’t like beetroot juice straight up, try adding some apple slices, mint, citrus, or a carrot to cut through the earthy taste.
If you decide to add beetroot juice to your diet, take it easy at first. Start by juicing half a small beetroot and see how your body responds. As your body adjusts, you can drink more.