Alpha-ketoglutarate
A Krebs-cycle compound, taken later in life or around training.
- Healthy ageing
- Exercise and training
A plain-English overview, not advice. Written from published reviews and trials and from what people say in public forums.
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On this page
What is alpha-ketoglutarate?
Alpha-ketoglutarate, or AKG, is a small molecule the body already makes as part of its everyday energy chemistry, in the cycle of reactions cells use to turn food into usable energy. As a supplement it is most often sold bound to calcium, or combined with the amino acids arginine or ornithine in products aimed at training. The amount the body holds onto is known to fall as people get older, and that has drawn interest in taking more of it later in life. It has become much better known in the last few years for that reason, alongside a smaller, longer-standing following among people who train.
Why do people take alpha-ketoglutarate?
Healthy ageing
The thinking. The body makes alpha-ketoglutarate on its own, and the amount found in the blood is known to fall as people get older. That decline is the starting point for interest in taking more of it later in life: since the molecule is involved in the chemistry cells use for energy and in the switches that turn genes on and off, the idea is that a supplement might add back some of what natural levels no longer provide. It is generally taken as the calcium-bound form.
What research has found. No trial in people has measured this, so there is nothing to report either way yet.
Exercise and training
The thinking. People who train sometimes take alpha-ketoglutarate around workouts, often combined with the amino acid arginine or ornithine rather than on its own. The thinking draws on its part in the body’s energy-producing chemistry and in how muscle cells repair and rebuild themselves after exercise, which has led some to expect it might help with recovery or with building muscle over time. Most of the products sold this way pair it with another active ingredient, rather than alpha-ketoglutarate alone.
What research has found. Nobody has tested this in a trial yet, so there is nothing to report either way.
What does alpha-ketoglutarate do in the body?
Alpha-ketoglutarate sits at a junction in the Krebs cycle, the loop of reactions cells use to turn food into usable energy, and from there it feeds into how the body builds and breaks down amino acids, the building blocks of protein and muscle. Because of that central position, it also acts as a source of raw material and energy for tissues that turn over quickly, including the lining of the gut.
Inside cells it also has a role beyond energy: it is one of the raw materials certain enzymes need to add or remove chemical tags on DNA and the proteins DNA is wrapped around, a process that switches genes on and off. It has antioxidant properties too, meaning it reacts with some of the unstable molecules produced as a by-product of normal cell activity. Most of what is known about these roles comes from cell and animal research rather than from people taking it as a supplement.
What do people say about taking alpha-ketoglutarate?
These are anecdotes people have shared, not evidence.
No community discussions have been summarised for this page yet.
What forms of alpha-ketoglutarate are there?
| Form | What’s different | Per serving, on products we list |
|---|---|---|
| Calcium AKG | A calcium salt of alpha-ketoglutarate, one of two forms sold as this supplement. | not in our price tables yet |
| Other forms | The plain, free-acid form, sometimes simply labelled alpha-ketoglutarate or AKG. | not in our price tables yet |
What else is worth knowing about alpha-ketoglutarate?
- A trial testing calcium alpha-ketoglutarate against biological ageing markers has begun recruiting adults, but it has not yet published results.
- Older studies from the 1980s and 1990s looked at it in hospital settings, such as recovery after surgery, rather than as a general supplement.
- Most of what has been published on alpha-ketoglutarate is cell and animal research; very little has been tested in people taking it by mouth as a supplement.
- Some products combine it with the amino acids arginine or ornithine, often labelled AAKG or OKG; those are compared as their own separate supplements, not here.
If you take medication, are pregnant, or have a health condition, check with a pharmacist or GP first.
The research behind this page (5 studies)
- Alpha-Ketoglutarate dietary supplementation to improve health in humans. (2022, review)
- Pleiotropic effects of alpha-ketoglutarate as a potential anti-ageing agent. (2021, review)
- Alpha-Ketoglutarate and intestinal function. (2011, review)
- Impact of Alpha-Ketoglutarate on Skeletal Muscle Health and Exercise Performance: A Narrative Review. (2024, review)
- Alpha-Ketoglutarate: A Metabolic Regulator of Cellular Homeostasis and Pathophysiology. (2026, review)
How much does alpha-ketoglutarate cost?
That depends on the form and the pack, so we work out the price of the same dose of every alpha-ketoglutarate product we can find and rank them.