Vitamin B – Energy, Metabolism & Nervous System Supplement

B vitamins: essential cofactors of energy metabolism, nerve function and the reduction of fatigue.

Discover our selection of products tested and approved by our team

5 products

Purpose of this collection: to help you choose the right vitamin B supplement based on your needs: energy, nervous system, stress management or deficiency prevention.

Why Are B Vitamins Essential?

B vitamins (B1, B2, B3, B5, B6, B8, B9, B12) play a fundamental role in energy production, neurotransmitter synthesis and the proper functioning of the nervous system. Each acts as a coenzyme in hundreds of biological reactions. Their importance is particularly significant during periods of stress, overwork or chronic fatigue.

A Closer Look at Key B Vitamins

Vitamin B1 (Thiamine) — Converts carbohydrates into energy; supports the nervous and muscular systems. Essential for athletes with high carbohydrate intake.

Vitamin B6 (Pyridoxine) — Synthesis of dopamine, serotonin and GABA. Stress, mood and sleep management. Cofactor in magnesium absorption.

Vitamin B12 (Cobalamin) — Red blood cell production, memory and central nervous system. Essential for vegetarians and vegans (absent from plant sources). Deficiency is common after age 60.

B complex or individual B vitamin?

B complex supports energy and metabolism overall. Choose an individual B vitamin if you have a confirmed specific deficiency (B12 for vegetarians, B6 for stress). Combine vitamin B6 + magnesium for a powerful synergistic anti-stress effect.

Force Addict Pro tip: take B vitamins in the morning or at lunch with a meal. Avoid taking them in the evening: their stimulating effect on energy metabolism may interfere with falling asleep. Take in 2-3 month cycles with a break.

Explore Complementary Collections

  • Multivitamins: complete formulas incorporating B vitamins within a broad spectrum.
  • Minerals: magnesium + B6 for energy synthesis and stress management.
  • Health & Wellness: complementary adaptogenic plants (rhodiola, ashwagandha).

Key Takeaways

B vitamins are essential for energy, the nervous system and stress management. A B complex supports overall metabolism. B12 is a priority for vegetarians/vegans. B6 is the most relevant for stress and mood, combined with magnesium for an optimal synergistic effect.

Questions fréquentes

Retrouvez les réponses aux questions les plus courantes avant votre achat.

Is vitamin B12 really useful for vegan athletes, and what dose should be supplemented?

Vitamin B12 is essentially absent from plant sources (spirulina contains inactive analogs that cannot be used). For vegans, supplementation is medically necessary, not optional. B12 is essential for red blood cell synthesis (oxygen transport), neurological function and homocysteine metabolism. For athletes: a B12 deficiency causes macrocytic anemia that reduces aerobic capacity, chronic fatigue and neurological disorders (paresthesia). Recommended dose for vegans: 250-500µg/day of cyanocobalamin or 1000µg 3x/week. Cyanocobalamin is the most studied and reliable form.

Do B vitamins help increase energy and improve athletic performance?

B vitamins are coenzymes of energy metabolism (B1, B2, B3 are involved in the respiratory chain and glycolysis). For people without a deficiency, supplementing with B vitamins does not directly improve performance. However, a deficiency in B1, B2, B3 or B12 significantly reduces the ability to produce ATP energy. Situations at risk of B vitamin deficiency in athletes: severe calorie-restricted diets, veganism, high alcohol intake, chronic intense stress. B vitamin injections, popular in some athletic circles, do not improve performance beyond correcting a deficiency.

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