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Vitamin · in-depth review

Vitamin B2 (Riboflavin)

Vitamin B2 (Riboflavin)

Riboflavin forms the coenzymes FMN and FAD, which carry hydrogen in mitochondrial energy production and glutathione reduction. Dairy, eggs, and organ meats are the main everyday sources.

Also known asRiboflavin
Related diseasesMigraine
Related symptomsHeadacheFatigue

Marked asPrimarySupporting

Primary

Supports cellular energy

FMN and FAD are prosthetic groups of many dehydrogenases; fatty-acid and amino-acid oxidation and the electron-transport chain all need flavins to carry hydrogen. Milk, eggs, and organ meats are the main everyday sources; when these foods are strictly avoided and the diet is unfortified, afternoon fatigue and poor recovery after exercise more often appear together.

Primary

Maintains skin and mucous membranes

Glutathione reductase also needs FAD before cellular antioxidant reduction can turn over; angular cheilitis, glossitis, and photophobia are the more typical mucosal–skin picture of B2 deficiency. People on dairy-limited diets less often see that harmless bright-yellow urine, and the gap is often written first at the corners of the mouth and as light sensitivity.

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Headache

FMN and FAD are prosthetic groups of many dehydrogenases; fatty-acid and amino-acid oxidation and the electron-transport chain all need flavins to carry hydrogen. People with recurring tightness at the forehead or temples more often notice fewer episodes and less tightness after several continuous weeks.

Fatigue

FMN and FAD are prosthetic groups of many dehydrogenases; fatty-acid and amino-acid oxidation and the electron-transport chain all need flavins to carry hydrogen. People who cannot get going by day and feel foggy in the afternoon more often notice stamina for tasks and mental freshness after several continuous weeks.

Migraine

FMN and FAD are prosthetic groups of many dehydrogenases; fatty-acid and amino-acid oxidation and the electron-transport chain all need flavins to carry hydrogen. People with recurring one-sided throbbing headache more often notice attack frequency and light sensitivity after several continuous weeks.

With foodMay be taken with breakfast or lunch; if your stomach is sensitive, switch to after a meal. Fat-soluble vitamins are better with fat-containing food; water-soluble vitamins can usually be taken on an empty stomach or with food
Best timeMorning or midday
SolubilityWater-soluble

Urine color change is usually from riboflavin metabolites.

General wellness1.3 mg/day for adult men; 1.1 mg/day for adult women
Specific needsNo official UL; typical supplement daily safety upper limit is about 100 mg. Migraine research doses may reach 400 mg/day and must be supervised by a clinician; do not exceed this on your own long term.

How oftenCan be used at the recommended daily intake.

Cautions

Migraine use should be assessed by a clinician; research doses differ from general wellness amounts.

Interactions

  1. Public monographs do not list a clear drug conflict; people on medicines should still ask a clinician first
Common side effects

· Bright yellow urine is usually harmless

Rare but important

· High doses may cause mild gastrointestinal discomfort.

Long-term dependenceDoes not cause addiction or typical tolerance.

Sources

These are institution pages you can check—not a certification of this ingredient.

Medical disclaimerThis page is compiled by the HerbBB editorial team for general health information only. It is not a substitute for advice from a doctor, pharmacist, or other qualified clinician. If you have a health condition, take medicines, or are pregnant or breastfeeding, speak with a professional first.