Βιταμίνες D3, B12 & B9 – Οφέλη, Συμπτώματα, Πηγές & Έλεγχος με Αιματολογικές Εξετάσεις

Guide to Vitamins: Foods, Benefits, and Testing

Vitamins D3, B9 (folic acid) and B12 are essential micronutrients that contribute to bone health, strengthening the immune system, the smooth functioning of the nervous system and cell growth. Their deficiency can lead to serious consequences for the body, which makes it important to ensure adequate intake through diet or supplements and to regularly measure their levels with blood tests.

Vitamin D3 — The sunshine of health

What is it and why do we need it?

Vitamin D3 (cholecalciferol) is a fat-soluble vitamin that is synthesized in the skin upon exposure to sunlight and is found in limited foods. It is essential for the absorption of calcium and phosphorus, maintains healthy bones and teeth, and plays a role in regulating the immune system.

Consequences of deficiency

D3 deficiency can lead to:

  • Osteoporosis
  • Muscle weakness and fatigue
  • Cardiovascular diseases
  • Increased susceptibility to infections and autoimmune diseases

Natural resources

  • Fatty fish (salmon, mackerel, sardines)
  • Egg yolk
  • Liver
  • Fortified dairy and cereals

Did you know that…

Vitamin D deficiency occurs in a large percentage of the Greek population, reaching 70%.

Vitamin B12 — The shield of the nervous system

Vitamin B12 Role

B12 (cobalamin) is a water-soluble vitamin that contributes to the formation of red blood cells, DNA synthesis and the normal functioning of the brain and nervous system.

Deficiency symptoms

  • Neurological problems (numbness, weakness, balance disorders)
  • Reduced memory and concentration
  • Depression
  • Megaloblastic anemia

Natural resources

  • Red meat and liver
  • Fish and seafood
  • Dairy products
  • Eggs
  • Fortified plant-based drinks and cereals

Did you know that…

Vitamin B12 deficiency may occur in between 40% and 80% of the vegetarian population.

Vitamin B9 (Folic Acid) — The ally of growth

Vitamin B9 Role

B9 is essential for the production of DNA and RNA, the formation of red blood cells, and the development of the fetus. It protects against neural tube defects during pregnancy.

Deficiency symptoms

  • Megaloblastic anemia
  • Fatigue
  • Memory and concentration problems
  • Increased risk of developing Alzheimer’s disease
  • Pregnancy complications

Natural resources

  • Green leafy vegetables (spinach, broccoli, lettuce)
  • Legumes
  • Whole grains
  • Citrus fruits
  • Enriched baked goods

Did you know that…

Vitamin B9 deficiency contributes to carcinogenesis due to problems in the synthesis of DNA and RNA.

Vitamin Checking with Blood Tests

Measuring vitamin levels in the blood is the most reliable method to identify a deficiency before it causes serious problems.

In Falireas Medical microbiological laboratories, complete testing of vitamins D3, B12 and B9 is carried out with high-precision analyzers (Alinity CI by Abbott).

Advantages of vitamin blood testing:

  • Immediate and reliable diagnosis
  • Ability to track improvement after treatment or supplements
  • Personalized nutritional and medical instructions

Examination procedure:

  • Sample: Taking a small amount of blood
  • Preparation: Usually no fasting required
  • Result time: Same day

Regular measurement is particularly important for people who belong to high-risk groups, such as:

  • Elderly
  • Pregnant women
  • Vegetarians/vegans
  • People with chronic diseases or gastrointestinal problems

Adequate intake and regular monitoring of vitamin D3, B12 and B9 levels are crucial for health. Through proper nutrition, targeted supplements and regular blood tests, we can prevent serious problems and keep our body in optimal function.

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