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Supplement · vitamin

Vitamin B2

Quick read: Riboflavin, commonly known as Vitamin B2, is a water-soluble vitamin essential for human health.

Quick facts · Riboflavin

Dose
10 mg
Timing
Daily
Course
90 days + break 30 days
Strongest effect
Cellular Energy SupportVery highTheoretical
Scientific background
Riboflavin, commonly known as Vitamin B2, is a water-soluble vitamin essential for human health. Biochemically, it is the precursor to two vital coenzymes, flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD). Humans cannot synthesize riboflavin and must acquire it from dietary sources such as dairy, eggs, lean meats, and leafy green vegetables. Within the body, FMN and FAD are indispensable prosthetic groups for flavoproteins, enzymes critical for numerous metabolic processes. Their primary physiological role involves facilitating diverse redox reactions, acting as crucial electron carriers. For instance, in the electron transport chain, FAD plays a pivotal role in cellular energy production (ATP synthesis). They are also fundamental for fatty acid oxidation, amino acid metabolism, and activating other B vitamins. Supplementation is primarily indicated to prevent or correct riboflavin deficiency (ariboflavinosis), which can present with mucocutaneous lesions. Beyond deficiency, research explores its potential in migraine prophylaxis, supporting iron metabolism, and its antioxidant properties against oxidative stress, with ongoing studies investigating its broader implications for neurological and cardiovascular health.

Form & dosage

Single dose
10 mg
Daily
10 mg
Course
90 days
Break
30 days
Timing
Daily
How we rate evidence

Probability — how likely the effect is to show up

  • Very high
  • High
  • Medium
  • Low

Evidence — where the data comes from

  • Scientific Meta-analyses and randomized trials
  • Clinical Clinical trials and practice
  • Animal research Animal studies
  • People reports User reports and anecdotes
  • Theoretical Mechanistic reasoning, not yet tested

Effects

Very high probability(2)

  • Cellular Energy Supporthealththeoretical

    Riboflavin is a cornerstone of cellular energy, forming FAD and FMN which are vital coenzymes in the electron transport chain, ensuring efficient ATP production.

  • Nutrient Deficiency Replenishmenthealththeoretical

    As an essential vitamin, Riboflavin directly addresses and prevents deficiencies, ensuring the body has sufficient levels for its myriad metabolic functions, which is foundational for overall health.

High probability(6)

  • Fatigue Reductionpsychetheoretical

    By fueling the body's energy factories, Vitamin B2 helps convert food into usable energy more efficiently, leading to a noticeable reduction in both physical and mental tiredness for many users.

  • Eye Health and Vision Supporthealththeoretical

    Riboflavin contributes to the antioxidant defense system within the eyes, helping to protect the delicate tissues of the lens and retina from oxidative damage, crucial for maintaining long-term vision.

  • Homocysteine Level Reductionhealththeoretical

    Riboflavin acts as a crucial cofactor in the metabolism of homocysteine, helping to convert this potentially harmful amino acid into less toxic compounds, which is vital for cardiovascular health.

  • Physical Energy Boostbodytheoretical

    As a crucial component of metabolic pathways, Vitamin B2 helps optimize the conversion of carbohydrates, fats, and proteins into energy, boosting overall physical vitality and stamina.

  • Antioxidant Protection Enhancementhealththeoretical

    As a precursor to FAD, Vitamin B2 is essential for the function of glutathione reductase, an enzyme that regenerates glutathione, one of the body's most powerful intrinsic antioxidants, thereby boosting overall protective capacity.

  • Cardiovascular System Supporthealththeoretical

    By supporting healthy homocysteine levels and boosting antioxidant defenses, Vitamin B2 indirectly contributes to the health and integrity of blood vessels, fostering a robust cardiovascular system over time.

Medium probability(1)

  • Concentration Improvementmindpeople_reports

    By optimizing brain energy metabolism and reducing mental fatigue, Vitamin B2 can help sharpen focus and improve sustained concentration, allowing for greater mental clarity and productivity.

Side effects

Low probability(1)

  • Digestive Discomforthealthpeople_reports

    While Vitamin B2 is generally well-tolerated, some individuals may experience mild digestive upset, such as a feeling of fullness or light stomach discomfort, particularly when consuming higher doses or if sensitive to the supplement. This is typically due to the unabsorbed vitamin or excipients mildly irritating the gastrointestinal tract.