B-Vitamins: Essential for Converting Food into Energy

The eight B vitamins help turn the food you eat into energy and keep your nerves, blood and brain healthy. Here’s what each one does.

Energy & Vitality 6 min read Research-informed
B-Vitamins: Essential for Converting Food into Energy

The essentials

  • B vitamins work as a team to convert carbohydrates, fats and protein into usable energy.
  • B12 and folate are vital for red blood cells; B6, B12 and folate support mood and the nervous system.
  • Vegans, older adults and pregnant women may need to pay extra attention to B12 and folate.

The B vitamins are a group of water-soluble vitamins with a big job: turning the food you eat into energy. They're also involved in making red blood cells, supporting brain function and building DNA. Here's a guide to each B vitamin, what it does, where to find it and why getting enough matters.

Why B Vitamins Matter

The B group includes B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate) and B12 (cobalamin). They work together to support the enzymes that produce energy.

  1. Energy metabolism: They drive the processes that turn carbohydrates, protein and fat into fuel. Without them, your body can't use food efficiently.
  2. Nervous system: B12 and B6 in particular keep nerve cells healthy and neurotransmitters working.
  3. Red blood cells: B12 and folate are needed to make red blood cells, which carry oxygen around your body.
  4. DNA: Folate is key for making and repairing DNA, essential for cell growth.
  5. Mood and mind: B6, B12 and folate are linked to mood regulation and may influence the risk of depression and cognitive decline.

Meet the B Vitamins

  1. B1 (thiamine): Turns carbohydrates into energy and supports nerve function.
  2. B2 (riboflavin): Supports energy production and the metabolism of fats, and helps keep skin and eyes healthy.
  3. B3 (niacin): Helps enzymes convert carbs and fats into energy and supports DNA repair and hormone production.
  4. B5 (pantothenic acid): Needed to make coenzyme A, which is central to converting food into energy.
  5. B6 (pyridoxine): Key for protein metabolism, neurotransmitters and red blood cells, and supports immunity and hormone balance.
  6. B7 (biotin): Helps metabolise carbs, fats and protein and is linked to healthy hair, skin and nails.
  7. B9 (folate): Crucial for DNA, cell division and red blood cells, and especially important in pregnancy.
  8. B12 (cobalamin): Essential for red blood cells, nerve health and DNA, and helps metabolise fats and amino acids.

Where to Find B Vitamins

  1. Whole grains: Brown rice, oats, barley and wholewheat products provide B1, B3 and B5.
  2. Meat, poultry and fish: Rich in B6 and B12; liver is particularly packed with B vitamins.
  3. Dairy: Milk, yoghurt and cheese provide riboflavin and B12.
  4. Eggs: A good source of biotin and other B vitamins.
  5. Pulses: Beans, lentils and peas are high in folate.
  6. Nuts and seeds: Almonds, sunflower seeds and peanuts provide B6 and folate.
  7. Leafy greens: Spinach and kale are rich in folate.
  8. Fruit: Citrus, bananas, avocados and berries provide folate and B6.

Signs You May Be Low

  1. Tiredness: Low energy can signal a lack of B12, B6 or folate.
  2. Mood changes: Deficiencies may contribute to low mood, anxiety or irritability.
  3. Skin problems: Rashes or dryness can point to low riboflavin, niacin or biotin.
  4. Nerve symptoms: Tingling or numbness may indicate B12 deficiency, which needs prompt medical attention.
  5. Digestive issues: Some deficiencies cause diarrhoea or constipation.

How to Keep Your Levels Healthy

  1. Eat a varied diet: Foods from every group give you a broad range of B vitamins.
  2. Cook gently: Some B vitamins are destroyed by heat or leach into water, so steaming or microwaving helps preserve them.
  3. Consider a supplement: If you're vegan (B12 in particular), pregnant or at risk of deficiency, talk to a healthcare provider about supplements.
  4. Get checked: Blood tests can reveal low levels, especially if you have symptoms or a relevant health condition.

Fuel for Everyday Energy

B vitamins are essential for turning food into energy and keeping your body healthy, from red blood cells to your nervous system. Eating a variety of B vitamin-rich foods supports steady energy, better stress resilience and overall wellbeing.

This guide is for general education only. Speak with a doctor or pharmacist before starting any supplement, especially if you are pregnant, breastfeeding, take medication or have a health condition.