Coenzyme A

VitaminCoenzymeBest with a meal

What is it

Coenzyme A (CoA) is a central cellular cofactor synthesized in the body from pantothenic acid (vitamin B5), ATP, and cysteine. It is essential for fatty acid metabolism, the Krebs cycle, and many acylation reactions. Some products sell oral 'CoA' as a supplement, though the molecule's oral bioavailability is limited.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Energy metabolism support

Mixed Evidence

Pantothenic acid deficiency (which would impair CoA) is rare in normal diets. No clinical evidence that supplemental oral CoA provides benefits beyond pantothenic acid in healthy people.

How it works

CoA carries acyl groups (such as acetyl-CoA, succinyl-CoA) and is the universal acyl carrier in energy metabolism, fatty acid synthesis and oxidation, ketone metabolism, and cholesterol synthesis. The body makes CoA from precursors including dietary pantothenic acid. Intact CoA taken orally is degraded in the GI tract; absorption of the whole molecule is poor. Functionally, supplementing pantothenic acid is the most established way to support CoA synthesis. Direct oral CoA supplements have not been clearly shown in trials to outperform pantothenic acid in raising tissue CoA.

Dosage

There is no RDA for CoA itself. Pantothenic acid AI for adults is 5 mg/day. Oral CoA supplement labels often suggest 50–250 mg per day, without strong evidence supporting these doses over pantothenic acid alone.

When and how to take it

If supplementing, taking with food is conventional.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Oral CoA (sodium salt)

Marketed supplement form with limited evidence for advantage over pantothenic acid.

Poor intact absorption.

Pantothenic acid (vitamin B5, CoA precursor)

More practical and well-studied way to support CoA synthesis.

Well absorbed orally.

Safety

Pantothenic acid is very well tolerated at typical doses; very high doses (10 g/day) can cause mild diarrhea. Oral CoA has not been extensively studied for high-dose safety.

Who should be cautious

Pregnancy and breastfeeding safety of high-dose CoA supplements is unknown. Pantothenic acid at AI levels is safe.

Interactions

No clinically established drug interactions.

Food sources

Liver, egg yolk, mushrooms, avocado (B5 sources)

Amount
Variable
%DV
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Frequently asked questions

Should I take CoA or pantothenic acid?⌄

Pantothenic acid is the established supplement for supporting CoA synthesis and is well absorbed. Direct oral CoA has not been clearly shown to be superior.

References

Coenzyme A on Wikidata — Wikidata link

Coenzyme A (ChEBI:15346) — ChEBI link

Coenzyme A (PubChem CID 87642) — PubChem link

Coenzyme A on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Coenzyme A (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.