Supplements · Diets
Do ketone supplements actually raise blood ketones?
The claim, precisely: exogenous ketones increases blood ketones
Yes — this is the one firmly proven effect, though the rise is only temporary.
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
How the studies fall
What the evidence shows
Exogenous ketones (esters, salts, (R)-1,3-butanediol) reliably and dose-dependently raise blood BHB - the ONE unambiguously proven effect. Transient (~2-4h); monoesters give higher/faster peaks than salts or the 1,3-butanediol precursor (which needs hepatic conversion).
The evidence (3)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Egan 2025 2025 · Scand J Med Sci Sports | meta-analysis | supports | moderate | EKS reliably produce acute transient BHB rise (perf unproven) |
| Clarke 2025 2025 · Eur J Nutr | RCT | supports | high | ketone ester raised circulating BHB + lowered post-exercise glucose |
| (SR/MA 43 trials) 2022 · (MA) | meta-analysis | supports | high | MA 43 trials/586 participants: BHB +1.98 mM vs placebo; monoesters > salts |
Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.