“Ornithine ketoglutarate?”Here!OKG

Synthetic

Hasn’t appeared in a scanned product yet.

As a supplement

Talk to your doctor or pharmacist.

Roll Call does not check drug interactions or assess personal safety.

A compound combining the amino acid ornithine with alpha-ketoglutarate, a molecule involved in cellular energy metabolism. It is marketed mainly in sports nutrition and clinical nutrition contexts.

Why it’s used

Taken by some to support recovery, muscle protein metabolism, or growth hormone release, particularly around exercise.

What the evidence says

Human research on ornithine ketoglutarate is limited and mostly older or small in scale, including some work in critically ill or burn patients receiving it as part of clinical nutrition rather than as a general supplement. Evidence supporting its use by healthy, exercising adults is thin and not well established.

Where we looked

There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.

PubMed: 2 records · searched September 2026"Ornithine ketoglutarate"[Title/Abstract] AND (review[pt] OR "safety assessment"[Title/Abstract] OR "risk assessment"[Title/Abstract] OR toxicology[Title/Abstract] OR toxicity[Title/Abstract] OR characterization[Title/Abstract] OR characterisation[Title/Abstract])
PubMed: 1 record · searched September 2026"Ornithine ketoglutarate"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH]
PubMed: 5 records · searched September 2026"Ornithine ketoglutarate"[Title/Abstract]

This says what this database holds under these terms. It is not a finding that no research exists.

Context

Where studied, doses and contexts vary widely (clinical enteral or parenteral nutrition versus oral sports-supplement use), which makes it hard to draw a single consistent dosing picture from the literature.

Rumors

1
OKG helps build muscle.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Exercise.com — a brand: sells gym management software for fitness businesses
  How we know who this is
  “Exercise.com is the best gym management software built to grow your fitness business, online and in-person.” (their page)
2
OKG prevents muscle loss, including age-related muscle loss (sarcopenia).
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Exercise.com — a brand: sells gym management software for fitness businesses
  How we know who this is
  “Exercise.com is the best gym management software built to grow your fitness business, online and in-person.” (their page)
3
OKG causes digestive upset such as diarrhea, bloating and gas.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Exercise.com — a brand: sells gym management software for fitness businesses
  How we know who this is
  “Exercise.com is the best gym management software built to grow your fitness business, online and in-person.” (their page)
4
OKG boosts growth hormone.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- supersmart.com — we couldn’t open the site to see who runs it
5
OKG speeds healing and recovery after trauma, surgery and severe burns.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Exercise.com — a brand: sells gym management software for fitness businesses
  How we know who this is
  “Exercise.com is the best gym management software built to grow your fitness business, online and in-person.” (their page)