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Head-to-head evidence comparison — which supplement is right for you?
Ashwagandha vs Beetroot: Beetroot has the stronger overall evidence (7.5 vs 7.5/10); they're alternatives for improve endurance — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Beetroot wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
4 of 4 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
7 of 9 studies with measurable effects showed benefit.
Top outcomes
300-600mg daily (standardized extract)
Morning for daytime stress, Evening for sleep support
KSM-66 or Sensoril standardized extract
400-500mg nitrates (or 500ml beetroot juice) (the cited trials gave about 260 to 1,040 mg of nitrate, none gave 400 to 500 mg)
2-3 hours before exercise
Concentrated beetroot shots (70ml)
2-4 weeks
2-4 weeks
2-4 weeks
First week
2-3 hours after intake
2-3 hours
Immediate
30-60 minutes
Effects of Ashwagandha (Withania Somnifera) on stress and anxiety: A systematic review and meta-analysis
Explore (NY) (2024) · Meta analysis · n=558
Significant effect on the Perceived Stress Scale (PSS) (MD = -4.72, 95 % CI = [-8.45 to -0.99]).
Effects of Withania somnifera Extract in Chronically Stressed Adults: A Randomized Controlled Trial
Nutrients (2024) · Rct · n=131
8-week double-blind RCT in adults with self-reported high stress comparing an aqueous root and leaf extract at 125, 250 and 500 mg a day with placebo (131 enrolled, 98 analysed).
Plant-derived nootropics and human cognition: A systematic review
Critical reviews in food science and nutrition (2023) · Systematic review
Bacopa monnieri improves language, learning and memory.
Dietary Nitrate Supplementation and Exercise Performance: An Umbrella Review of 20 Published Systematic Reviews with Meta-analyses
Sports Medicine (2025) · Meta analysis · n=2672
Twenty systematic reviews with meta-analyses, representing 180 primary studies and 2672 unique participants, met the inclusion criteria.
Effects of Beetroot Juice on Physical Performance in Professional Athletes and Healthy Individuals: An Umbrella Review
Nutrients (2025) · Systematic review
Fifteen meta-analyses were included in this Umbrella Review.
Sport supplementation in competitive swimmers: a systematic review with meta-analysis
Journal of the International Society of Sports Nutrition (2025) · Meta analysis · n=422
This revision included 23 studies, 16 of them (69.6%) qualified as excellent and 7 (30.4%) as good at the methodological level based on the punctuation in the PEDro scale.
The points come from one 8-week dose-comparison RCT of an aqueous root and leaf extract at 125, 250 or 500 mg a day against placebo in adults with self-reported high stress (PMID 38732539, 131 enrolled, 98 analysed). All three doses reduced perceived stress and were reported as safe, and the authors describe the effect as dose-dependent. The abstract gives no per-dose effect sizes, so the curve shows only that ordering, not how large each step is. It also does not show whether doses above 500 mg add more. Trials of other extracts (root-only extract at 600 mg a day, PMID 23439798, and a 240 mg extract, PMID 31517876) are not on this axis because milligrams of different extracts are not equivalent.
The points come from one crossover dose-response trial in 10 healthy men given 70, 140 or 280 mL of concentrated beetroot juice, containing 4.2, 8.4 and 16.8 mmol of nitrate (about 260, 521 and 1,042 mg), 2.5 hours before cycling (PMID 23640589). 70 mL did not change the exercise responses compared with nitrate-depleted placebo. 140 and 280 mL extended time to task failure in severe cycling by 14% and 12%, and the higher dose gave no further improvement, so the curve is flat above 521 mg. The abstract does not report tolerability, so no ceiling is set. The curve rests on acute single doses in young men and cannot show effects of daily use, in women, in older adults or in trained athletes.
AI-estimated from published studies. Interpret as directional guidance.
Beetroot has a higher evidence score (7.5/10 vs 7.5/10) and wins in 2 of 3 categories.
For improve endurance, Beetroot has a higher relevance score (95 vs 55).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The honest tier list — proven staples vs situational vs mostly marketing. The hub the other guides feed into.
Selenium helps; iodine can WORSEN Hashimoto’s. The honest take on "thyroid support".
CoQ10, zinc, selenium, carnitine modestly help sperm parameters — but live-birth evidence is weak.
Ashwagandha, L-theanine, magnesium, saffron — what actually helps stress, and the safety caveats.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.