Dave Asprey on Energy: A Fact-Check

Butter coffee is easy to make and some people genuinely like how it feels, but the specific claim of sustained energy without a crash has not been tested in a trial of the drink. The MCT component has a thin, small-study signal for memory and short-term cognitive performance. The fat load itself is the harder problem: a large meta-analysis found coconut oil raises LDL cholesterol relative to non-tropical vegetable oils. Feeling alert is not the same as an outcome anyone measured.

Dave Asprey said

“Asprey says blending butter and MCT oil into coffee delivers steady energy and focus without the mid-morning crash of ordinary coffee.”

The science says

No trial has tested butter coffee itself; the MCT component has weak, small-trial signals for cognition, while the saturated fat side of the drink runs against a clear meta-analysis showing tropical oils raise LDL cholesterol.

Science Score

A meta-analysis of coconut oil trials for LDL, a systematic review of small MCT and memory trials, and one short RCT in young adults. Nothing tests the actual drink.

The verdict

A real breakfast habit with a marketing claim attached to it that the studies never tested.

The claimWhat Dave actually said

Asprey has promoted blending coffee with butter and a coconut-derived MCT oil since around 2009, often as a breakfast replacement. He describes the benefit in terms of how you feel two hours later, contrasting it with a mid-morning crash from ordinary coffee. The claim is about sustained energy and focus rather than a measured clinical outcome.

Sources

Why it mattersWhy this matters for longevity

This drink is often used to replace breakfast, so it displaces protein and fibre rather than adding to them.

LDL cholesterol is one of the better-established modifiable inputs to cardiovascular risk, so a habit that raises it deserves scrutiny.

Subjective energy is one of the easiest things to feel and one of the hardest things to measure, which is exactly where claims outrun data.

The evidenceWhat the science says

A 2022 systematic review in BMC Geriatrics found medium-chain triglycerides may improve memory in non-demented older adults, based on a small number of randomized trials. A 2023 randomized controlled trial in Physiology and Behavior found an MCT blend improved cognitive performance and reduced the cognitive decline associated with prolonged exercise in young healthy adults. Both are narrow, short and use isolated MCT rather than a butter-and-oil coffee.

The honest caveat: no study has tested Bulletproof coffee, so the crash-free-energy claim is untested rather than disproven. Meanwhile a 2020 meta-analysis in Circulation found coconut oil significantly increased LDL cholesterol by 10.47 mg/dL (95% CI 3.01 to 17.94) compared with non-tropical vegetable oils, and butter contributes further saturated fat. Evidence does not support this drink for weight loss, longevity, or as a nutritionally adequate breakfast, and anyone with raised LDL or a family history of heart disease should treat it accordingly.

TakeawayThe honest takeaway

The practical lesson

If you enjoy it, treat it as a high-fat drink to count rather than a free upgrade, and do not let it replace a breakfast with protein and fibre.

RelatedRelated habits

Black CoffeeProtein-Forward BreakfastTime-Restricted EatingKetogenic Diet

Each of these is a habit you can build on its own. Explore them through the Topics index.

SupplementsThe supplement angle: MCT oil

Support a habit, do not replace one

MCT oil is the component with any research behind it, and the trials are small, short and mostly in narrow populations. It is not established as a cognitive or longevity supplement, and higher doses commonly cause digestive upset.

Supplements can support good habits. They do not replace sleep, movement, nutrition, or medical care. Talk with your healthcare provider before starting anything new.

This is educational commentary, not medical advice, and does not imply that Dave Asprey endorses, is affiliated with, or uses Winning Longevity or any product. We critique the claim and the evidence, not the person. Any direct quote is a placeholder until sourced. Talk with a qualified healthcare provider before changing your routine. See our health disclaimer.

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