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Some research suggests that beets can help defend us against certain cancers, such as those of the prostate, breast, liver and lungs. This protective effect is due to its rich content of betaine, a powerful antioxidant. Beets are also rich in vitamins and minerals, notably potassium, sodium, magnesium and vitamin C.
Taking beet juice supplements temporarily gives the urine and stool a pinkish color and may cause mild gastrointestinal disturbances. It should be noted that the nitrate content in beet juice is variable and that some supplements are more concentrated than others.
In conclusion, to improve athletic performance, it is better to first optimize the quality of training, recovery, sleep and diet before deciding to take a supplement. All of these factors will have a much greater effect on performance than any supplement. On the other hand, if you have already optimized all these aspects, beet juice seems to be a safe choice and could in some cases provide some benefits to performance. Further research is needed to better understand the beneficial effects of nitrate supplementation as well as the protocol for its use.