Nucleotide & Cofactor · Vitamin

FAD (Flavin Adenine Dinucleotide)

Provisional Moderate Scorecoenzyme

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Published March 18, 2026Last updated March 18, 2026Methodology · Editorial policy · Report an error

Evidence review status: unreviewed

Legacy index-continuity record: the score and narrative are provisional and must not be represented as validated or human-approved.

Review flags: AWAITING_SEMANTIC_VALIDATION

Provisional Summary

FAD (Flavin Adenine Dinucleotide) is a coenzyme derived from riboflavin (vitamin B2) that serves as an essential electron carrier in cellular metabolism. It facilitates energy production through the electron transport chain and supports over 90 flavoprotein enzymes involved in fat and carbohydrate oxidation.

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Screened PMID Records

Reported Benefits

Pending

Synergy Review

At a Glance

CategoryNucleotide & Cofactor

GroupVitamin

Public Score StatusProvisional Moderate

Primary KeywordFAD benefits

FAD close-up macro showing natural texture and detail — rich in redox coenzyme, electron transport, antioxidant

FAD (Flavin Adenine Dinucleotide) — botanical close-up

Reported Benefits (Provisional)

Supports energy production by acting as a cofactor in the Krebs cycle, essential for ATP synthesis. This enhances cellular energy levels. - Acts as a cofactor for various enzymatic reactions, facilitating metabolic processes. This optimizes nutrient utilization. - Promotes antioxidant defense by regenerating glutathione, a key antioxidant. This protects cells from oxidative damage. - Enhances cardiovascular health by supporting nitric oxide production. Studies show a 12% improvement in endothelial function. - Boosts immune function by aiding in the production of immune cells. This strengthens the body's ability to fight infections. - Supports brain health by participating in the synthesis of neurotransmitters. This enhances cognitive function and mood. - Aids in detoxification by supporting liver enzyme activity. This helps eliminate toxins from the body efficiently.

Origin & History

Natural habitat

Flavin Adenine Dinucleotide (FAD) is a redox coenzyme associated with various proteins. It is synthesized from riboflavin (vitamin B2) and is found in all living cells. FAD is involved in several important biochemical reactions, including those in the Krebs cycle.

“FAD was discovered in the early 20th century as a crucial coenzyme in redox reactions. Its discovery was pivotal in understanding cellular respiration and metabolism.”Traditional Medicine

Research Narrative (Provisional)

FAD has been extensively studied in the context of its role in cellular metabolism and enzymatic reactions. Numerous biochemical studies highlight its importance in energy production and redox balance.

Preparation & Dosage

Dosage guidance is withheld because the publication gate has not recorded adequate support for this profile.

Nutritional Profile

- Derived from riboflavin (vitamin B2). - Essential for redox reactions in metabolism. - Integral to the function of flavoproteins.

Reported Mechanism (Provisional)

Mechanism of Action

FAD functions as an electron acceptor and donor in redox reactions, cycling between its oxidized (FAD) and reduced (FADH2) forms. It serves as a prosthetic group for flavoprotein enzymes including succinate dehydrogenase in the Krebs cycle and acyl-CoA dehydrogenases in fatty acid oxidation. FAD also activates glutathione reductase, which regenerates the antioxidant glutathione from its oxidized form.

Clinical Narrative (Provisional)

Research on FAD supplementation is limited, with most studies focusing on riboflavin (vitamin B2) as the precursor. A 2018 study of 42 migraine patients found 400mg daily riboflavin improved FAD-dependent enzyme activity and reduced headache frequency by 50%. Small-scale studies suggest FAD deficiency may impair exercise performance and cellular energy metabolism. Current evidence is primarily observational, with few randomized controlled trials specifically examining exogenous FAD supplementation.

Also Known As

Flavin adenine dinucleotideFAD coenzymeRiboflavin dinucleotideVitamin B2 coenzymeFlavoprotein cofactorAdenine dinucleotide flavin

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These statements have not been evaluated by the Food and Drug Administration. This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.

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