Research
Hormonal
Beetroot juice supplementation does not reliably improve cardiorespiratory endurance in hypoxic conditions (high altitude), and results are controversial.
Do not rely on beetroot juice to guarantee performance improvements when training or competing at high altitudes. The evidence is mixed, and it may not provide the expected ergogenic benefit in hypoxic environments.
ModerateRefutesLOW confidence
The hypothesis that beetroot improves cardiorespiratory performance in hypoxic conditions is controversial... Two studies evaluated the effect of the combination of beetroot juice and caffeine... The studies did not determine that the effects of beetroot juice combined with caffeine increase the cardiorespiratory performance regarding caffeine supplementation.
Why this rating
Mixed results in the reviewed studies.
Source
Effects of Beetroot Juice Supplementation on Cardiorespiratory Endurance in Athletes. A Systematic Review
Raúl Domínguez et al. · Nutrients · 2017
DOI 10.3390/nu9010043
systematic_reviewCited 216×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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