B vitamin deficiency

B vitamin deficiency

Individuals who engage in a one-sided or unhealthy diet can suffer from deficits in essential vitamins. Inadequate supply of one or more B vitamins can result in difficulties with the conversion of energy and anemia which can cause fatigue, reduced appetite, lack of energy and dizziness.

Vitamin B12
Anemia test

Vitamin B12

159 kr

Welcome to our B vitamin deficiency symptom guide. If you feel tired and lack energy, suffer from a decreased appetite or experience dizziness, these may be signs of a lack of important B vitamins. These nutrients play a crucial role in the body's energy conversion and blood formation. One-sided or unhealthy diet can be a contributing factor to B vitamin deficiency. If you also experience problems with your skin or notice neurological symptoms, this may also be related to a lack of B vitamins.

It is important to pay attention to these indications as vitamin B deficiency can negatively affect your health. We recommend that you seek advice and care to get a correct assessment of your situation. A balanced diet and proper nutrition are essential for well-being, and by addressing the deficiency, you can positively affect your health. Do not hesitate to consult a healthcare professional for further guidance and recommendations.

Different B vitamins and their function:

  • Thiamine (B1): Needed for carbohydrate and protein metabolism. Found in foods such as breakfast cereals, sunflower seeds and pork. Deficiency is rare, but can occur with alcohol abuse.
  • Riboflavin (B2): Necessary to break down carbohydrates, protein and fat. Found in meat, eggs, dairy products and green leafy vegetables. Deficiency is uncommon and can cause skin and mucous membrane problems.
  • Niacin (B3): Important for energy metabolism and nervous system. Found in meat, grains, fruits and vegetables. Deficiency is uncommon, but can lead to skin changes.
  • Pantothenic acid (B5): Required for fat and carbohydrate metabolism. Found in many foods such as whole grain products and meat. Shortage is very rare.
  • Vitamin B6 (pyridoxine): Needed for protein metabolism and nerve function. Found in meat, eggs, vegetables and nuts. Deficiency is uncommon due to broad diet.
  • Biotin (B7 or H): Important for fatty acid metabolism. Found in most foods and deficiency is very rare.
  • Vitamin B9 (folate or folic acid): Necessary for blood formation and cell growth. Found in vegetables, legumes and dairy products. Deficiency can lead to anemia and particularly affects pregnant women.
  • Vitamin B12 (cobalamin): Important for cell turnover, blood formation and nervous system. Found in animal products. Deficiency can occur in vegans and the elderly, as well as in certain medical conditions.

It is important to get enough B vitamins through a varied and balanced diet. Deficiency can negatively affect your health, so if you suspect a deficiency, you should consider dietary changes or consult with a healthcare professional.

Symptoms B vitamin deficiency may include:

  • Feeling of tiredness and lack of energy
  • Difficulty maintaining concentration
  • Skin and mucous membrane problems
  • Lost appetite
  • Anemia, which can manifest as fatigue, lack of energy or dizziness.

Related tests and health checks

Health checks

Health checks


Vitamin and Mineral
vitamins and minerals health check

Vitamin and Mineral

  • Health check that measures your vitamin and mineral levels.
  • Analysis of markers affecting depression and fatigue.
  • Gives you the conditions to optimize your health.

1 295 kr

Vitamin tests

Vitamin tests


Vitamin B12
  • Measures your levels of vitamin B12.
  • Indication of vitamin B12 deficiency.
  • Low levels can lead to anemia.

159 kr

Other symptoms