Which supplement works better to improve cycling sprint performance: beetroot juice or vitamin d3?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
Beetroot Juice
Vitamin D3

Effectiveness Rating: Beetroot Juice vs Vitamin D3

The effectiveness rating is a measure of the supplements' ability to improve cycling sprint performance. This rating answers the question of whether or not a supplement does what it claims. The evidence backing up beetroot juice to improve cycling sprint performance is much better than the evidence backing up vitamin d3. Beetroot Juice should provide positive results while vitamin d3 will not.

Confidence Rating: Beetroot Juice vs Vitamin D3

Another factor to take into account when comparing supplements is the confidence rating. This rating is a measure of how valid each supplement's effectiveness rating is. Remember, the confidence rating is a measure of how much you can trust the effectiveness rating. This rating is based on how many studies are included in the database on a supplement's claims. Ideally, you want a high effectiveness AND confidence rating.

Beetroot Juice's confidence rating is higher than vitamin d3's. This means beetroot juice's effectiveness rating from above is more valid. This does not necessarily mean that beetroot juice works better, it simply means the evidence (included in this database) backing up beetroot juice is more established.