Modern lifestyles pose many challenges to our health, one of the most important of which is adequate vitamin intake. Vitamins are organic compounds that cannot be produced in sufficient quantities by the body, so we need to get them through our diet. They are essential for the optimal functioning of our bodies, are involved in many biochemical processes and play a key role in maintaining general well-being.

The role of vitamins in health

Vitamins are essential to sustain life. They are involved in many biochemical reactions and are essential for cell growth, regeneration and proper metabolic processes. They also strengthen the immune system, help maintain healthy skin, hair and nails, and play a role in hormone production. Below we detail the most important vitamins, their roles and sources.

The most important vitamins and their sources

Vitamin A

Vitamin A (retinol) is essential for vision, skin health and the proper functioning of the immune system. It is also important to mention the precursor of vitamin A, beta-carotene, which is converted to retinol in the body. Sources.

B vitamins

The vitamin B group comprises eight different vitamins, each of which plays an important role in metabolic processes.

• B1 (thiamine): helps the nervous system and energy metabolism. Sources: whole grains, pulses, nuts.
• B2 (riboflavin): involved in energy production and cell growth. Sources: dairy products, eggs, meat, green leafy vegetables.
• B3 (niacin): important for digestive, skin and nervous system health. Sources.
• B5 (pantothenic acid): plays a role in hormone and cholesterol production. Sources: avocados, broccoli, eggs, meat.
• B6 (pyridoxine): essential for the metabolism of amino acids and the formation of haemoglobin.Sources: meat, bananas, potatoes, nuts.
• B7 (biotin): important for healthy skin, hair and nails and for the metabolism of carbohydrates. Sources: eggs, nuts, seeds, vegetables.
• B9 (folic acid): essential for cell division and DNA synthesis. Sources: green leafy vegetables, legumes, citrus fruits.
• B12 (cobalamin): important for red blood cell formation and nervous system health. Sources: meat, fish, dairy products, eggs.

Vitamin C

Vitamin C (ascorbic acid) is a powerful antioxidant that supports the immune system, helps iron absorption and promotes collagen production.
Sources: citrus fruits, peppers, broccoli, tomatoes, strawberries.

Vitamin D

Vitamin D is essential for bone and tooth health, as it helps the absorption of calcium and phosphorus.
Sources: fatty fish (such as salmon, tuna), eggs, fortified dairy products, sunlight.

Vitamin E

Vitamin E is an antioxidant that protects cells from harmful free radicals.
Sources: vegetable oils (e.g. olive oil, sunflower oil), nuts, seeds, spinach.

Vitamin K

Vitamin K plays an important role in blood clotting and bone metabolism.
Sources: green leafy vegetables (e.g. spinach, kale, broccoli), meat, dairy products.

Vitamin deficiency and overdose

Vitamin deficiencies

Vitamin deficiencies can lead to serious health problems. For example, a lack of vitamin C can cause scurvy, and a lack of vitamin D can cause angioedema. A lack of vitamin B12 can lead to anaemia and neurological damage, while a lack of folic acid during pregnancy can cause serious developmental problems in the foetus.

Overdose

Overdosing on vitamins, especially fat-soluble vitamins (A, D, E, K), can lead to toxic effects. For example, excessive intake of vitamin A can lead to liver damage and osteoporosis, while excessive intake of vitamin D can lead to hypercalcaemia (high levels of calcium in the blood), which can lead to kidney damage.

Vitamin supplementation

Although a varied and balanced diet usually provides enough vitamins for the body, sometimes supplements may be needed. This may be particularly important in certain life situations, such as pregnancy, old age or when following a special diet. However, it is always important to consult a doctor or dietician before taking any supplements to avoid the risk of overdose and interactions.

Vitamins and diet: balanced nutrient intake during dieting

In diets, especially weight-loss diets, special attention should be paid to the adequate intake of vitamins. Calorie-restricted diets often limit the variety of foods consumed, which can lead to vitamin deficiencies. For example, low-carbohydrate diets include fewer fruits and whole grains, which are important sources of B vitamins and vitamin C.

The following tips can help you maintain your vitamin intake while on a diet:

• Variety of meals: it is important to eat as wide a range of foods as possible during your diet to ensure you get all the vitamins you need.
• Fruit and vegetables: fruit and vegetables are low in calories but rich in vitamins and minerals, so it’s important to eat plenty of them.
• Grains rich in fibre: These grains not only provide energy, but are also an important source of B vitamins.
• Quality proteins: lean meats, fish, eggs and pulses are not only rich in protein, but also contain a variety of vitamins.
• Collagen
• Supplements: if your diet is very strict or one-sided, consider taking multivitamin supplements to avoid deficiencies.

It is always important to consult a nutritionist or doctor to ensure that you are getting the right vitamins and minerals during your diet, so that your diet is not only effective but also healthy.

Summary

So vitamins are indeed the cornerstone of health, without which the body cannot function properly. A good diet and vitamin supplementation when needed can help to maintain long-term health. Remember that prevention is always easier and more effective than treating problems that have already developed, so it’s worth paying attention to your daily vitamin intake. Adequate intake of vitamins will not only ensure our physical wellbeing, but also our mental wellbeing, leading to a better quality of life in the long term.