# Vitamin B

## What Is Vitamin B?

“Vitamin B” usually refers to the B-vitamin complex, a group of water-soluble vitamins that work together to support energy production, nervous system function and overall metabolism. The B-vitamin family includes B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate/folic acid) and B12 (cobalamin). Because B vitamins are water-soluble, the body does not store large amounts of most of them, so regular dietary intake is important. B vitamins are found in foods such as whole grains, meat, fish, eggs, dairy products, legumes, leafy greens and fortified cereals.

## Benefits of Vitamin B Supplements

B vitamins contribute to normal energy-yielding metabolism and help reduce tiredness and fatigue (especially vitamins B2, B3, B5, B6, B9 and B12, depending on the nutrient). Several B vitamins support the normal functioning of the nervous system and normal psychological function. Folate (B9) contributes to normal blood formation, while vitamin B12 supports normal red blood cell formation and plays a role in immune function. Biotin (B7) is often included in hair, skin and nail formulas. B-complex supplements are commonly used by people with increased needs, stress, restrictive diets, low appetite, or those who want convenient daily support for energy and wellbeing.

## Uses of Vitamin B

B-vitamin supplements are available as individual vitamins (such as B12 or folate) or as B-complex products that provide multiple B vitamins in one capsule or tablet. They are typically taken once daily, often in the morning with food. Athletes, busy professionals and students often use B-complex supplements during demanding periods. People following vegan diets may need B12 supplementation, as B12 is mainly found in animal foods. On our category page you can explore different vitamin B products – from B-complex formulas to specific B vitamins – and choose the option that fits your needs.

## Vitamin B: Side Effects and Safety

B vitamins are generally safe when used as directed, but high doses of certain B vitamins may cause side effects. For example, niacin (B3) can cause flushing, and high-dose vitamin B6 taken long-term may lead to nerve-related symptoms. Because some B vitamins can interact with medications, people taking prescription medicines should consult a healthcare professional before using high-dose B-complex products. If you are pregnant or breastfeeding, choose supplements designed for that stage and follow professional advice. Always follow label directions and avoid unnecessary megadoses.

## Where to Buy Vitamin B in Estonia?

In Estonia, **vitamin B supplements** can be purchased from our e-shop fits.ee.

## Products in this collection

- [Vitamin B Complex 60 tablets](https://fits-supplements.com/products/vitamin-b-complex-60-tablets) - 8.9 EUR
- [Myo inositol 800mg 90 capsules](https://fits-supplements.com/products/myo-inositol-800mg-90-capsules) - 10.9 EUR
- [Choline and Myo Inositol 90 capsules](https://fits-supplements.com/products/choline-and-myo-inositol-90-capsules) - 8.9 EUR
- [Vitamin B12 1000mcg 90 tablets](https://fits-supplements.com/products/vitamin-b12-1000mcg-90-tablets) - 8.7 EUR
- [Biotin 5000mcg 90 tablets](https://fits-supplements.com/products/biotin-5000mcg-90-tablets) - 6.6 EUR
- [Neuro Vitamin 90 tablets](https://fits-supplements.com/products/neuro-vitamin-90-tablets) - 7.8 EUR
- [Biotin 10,000mcg 90 tablets](https://fits-supplements.com/products/biotin-10-000mcg-90-tablets) - 12.9 EUR
- [PQQ 20mg 60 capsules](https://fits-supplements.com/products/pqq-20mg-60-capsules) - 16.9 EUR
- [Folic acid 400mcg 90 tablets](https://fits-supplements.com/products/folic-acid-400mcg-90-tablets) - 6.9 EUR
- [Vitamin B1 100mg (Thiamin) 90 tablets](https://fits-supplements.com/products/vitamin-b1-100mg-thiamin-90-tablets) - 9.9 EUR
- [Vitamin B2 100mg (Riboflavin) 60 tablets](https://fits-supplements.com/products/vitamin-b2-100mg-riboflavin-90-tablets) - 9.9 EUR
- [Vitamin B3 16mg (Niacin) 90 tablets](https://fits-supplements.com/products/vitamin-b3-16mg-niacin-90-tablets) - 7.8 EUR
- [Vitamin B12 Strong 5000mcg 90 tablets](https://fits-supplements.com/products/vitamin-b12-strong-5000mcg-90-tablets) - 24.9 EUR
- [Vitamin B6 12mg 90 tablets](https://fits-supplements.com/products/vitamin-b6-12mg-90-tablets) - 11.9 EUR
- [Liquid Biotin 10000 mcg sugar free 500ml](https://fits-supplements.com/products/liquid-biotin-10000-mcg-sugar-free-500ml) - 24.9 EUR
- [Inositol powder 200g](https://fits-supplements.com/products/inositol-powder-200g) - 19.0 EUR
- [Vitamin B Complex Strong 60 tablets](https://fits-supplements.com/products/vitamin-b-complex-strong-60-tablets) - 7.8 EUR
- [Vitamin B6 100mg 90 tablets](https://fits-supplements.com/products/vitamin-b6-100mg-90-tablets) - 11.9 EUR

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> Source: [FITS Dietary Supplements](https://fits-supplements.com/collections/vitamin-b)
> Updated: 2026-07-21