Can "Ketone Drinks" Help With Age-Related Muscle Loss?

If you're losing muscle as you age — especially if you're also carrying extra weight — you may have heard about a new option called exogenous ketone esters. These are drinks that put your body into a mild, temporary "ketone" state, similar to what happens on a strict low-carb diet, but without having to actually eat that way. Here's what the research really shows, in plain terms, and what you can do about it starting now.

What's the Idea Here?

When your body runs low on carbohydrates for a while, it starts burning fat and produces small molecules called ketones for fuel. Studies suggest ketones don't just provide energy — they may also send signals to your muscles that help protect them from breaking down, and may calm the low-grade inflammation that comes with aging and speeds up muscle loss.

The catch: to get your body to make its own ketones naturally, you'd need to follow a very strict diet — about 80% fat and almost no carbs. That's extremely hard to stick with, especially for months or years. Ketone ester drinks are a shortcut: you drink a small amount and your ketone levels rise within about 15 to 30 minutes, without changing anything else about what you eat.

What Do We Actually Know So Far?

This is the most important part to understand honestly: most of the promising results — where muscle was actually protected — come from studies in mice, not people. In humans, we mainly know that:

• The drinks are generally well tolerated. Common side effects are mild and temporary: an upset stomach, a headache, less appetite, or occasionally nausea.

• Ketone levels do rise as expected and stay elevated for a couple of hours after each dose.

• Early studies suggest the drinks may boost the muscle-building response after exercise, but no study has yet proven that taking them for months actually builds or preserves muscle in people with sarcopenia.

• One trial currently underway is testing this specifically in frail older adults, gradually increasing the dose over several weeks — but results aren't in yet.

• A very recent animal study found that combining a ketone drink with popular weight-loss medications (like semaglutide/Ozempic) prevented the muscle loss that normally comes with those drugs, while still allowing fat loss. This is an exciting lead, especially since many older adults with obesity are now on these medications, but again — this hasn't been tested in humans yet.

So the honest summary is: promising idea, safe so far in small studies, but not yet proven to actually preserve muscle in people.

What Should You Actually Do?

Two things have solid, well-established evidence behind them, and should come first no matter what:

• Strength training. Doing resistance exercises two to three times a week is the single most proven way to preserve and rebuild muscle as you age.

• Enough protein. Aim for a good source of protein at each meal — this gives your body the building blocks it needs to maintain muscle, and matters more than any supplement.

If you want to try a ketone ester drink on top of that, here's how people typically approach it:

• Start with a small amount to see how your body reacts, before working up to a larger dose.

• Drink it after your workout, since that's when your muscles are most primed to use the signal for rebuilding.

• Expect an unusual, slightly bitter taste — most people describe it as unpleasant at first.

• Watch for mild stomach upset or headache. If you feel nauseous, dizzy, or unwell, stop and talk to your doctor.

• If you take medication for diabetes or blood sugar, check with your doctor first, since these drinks can lower blood sugar a bit on their own.

A Word on Cost and Alternatives

Ketone ester drinks are currently expensive and not something most people would want to take long-term without stronger proof that they work. If cost or taste is a barrier, a more budget-friendly option is adding a spoonful of MCT oil (a type of fat available at most health food stores) to your diet, which can raise ketones somewhat, combined with cutting back on refined carbs.

Bottom Line

Think of ketone ester drinks as a promising experiment, not a proven treatment. The science is real and the safety profile so far looks reassuring, but there isn't yet solid human proof that they build or protect muscle over time. If you're dealing with sarcopenia, put your effort first into strength training and eating enough protein — those are proven. If you're curious about ketone esters, it's reasonable to try them as an add-on, ideally with your doctor's input, especially if you're on other medications or have diabetes.

More about this topic can be found in our books on Our Books on Google Play and related articles in the Index.

Mykola Iabluchanskyi together with Andriy Yabluchanskiy