The tiny building blocks with huge impact

Micronutrients vs. Macronutrients – What is the difference?

Both micro- and macronutrients are essential components of a healthy diet, but they serve different roles in the body. 

Macronutrients, which include proteins, fats and carbohydrates, are the main sources of energy. They provide the body with the energy needed for physical activity and mental performance. They are also necessary for building and repairing tissues such as muscles, bones and skin. A deficiency in macronutrients is rare in most developed countries, as food is generally available in sufficient quantities. However, there are specific risk groups, such as older adults or people with chronic illnesses, for whom inadequate intake of macronutrients can impair recovery and overall health.

Micronutrients, by contrast, are nutrients required in much smaller amounts but are no less important. They are mainly responsible for regulating metabolism and supporting the immune system. Micronutrients contribute to the optimal function of the nervous system and hormones and support nerve signal transmission. Micronutrients include vitamins, minerals and trace elements, as well as other substances like plant compounds, prebiotics and probiotics. These substances are needed by the body to control a variety of biological processes, even though they do not provide direct energy.

Which micronutrients does the body need?

The body needs micronutrients such as vitamins, minerals and trace elements that are essential for vital functions. Vitamins, both fat- and water-soluble, support processes like metabolism, cell protection and immune defence. Minerals such as calcium and magnesium are central for bone formation, muscle function and energy metabolism.

Trace elements like iron and zinc are involved in oxygen transport, enzyme function and strengthening the immune system. A balanced diet with fruit, vegetables, whole grains, dairy, meat, fish and nuts ensures adequate supply.

What are the consequences of a micronutrient deficiency?

A deficiency in micronutrients can have various health consequences affecting both body and mind. Micronutrients such as vitamins and minerals are essential for many bodily functions, and insufficient intake can lead to a range of symptoms and diseases.

A lack of iron, for example, can cause anaemia, which presents as fatigue, weakness and reduced performance. A deficiency in vitamin D weakens the immune system and can lead to bone loss or osteoporosis. Likewise, insufficient amounts of B vitamins can result in psychological symptoms such as depression and irritability.

Micronutrient deficiencies also affect overall well-being and can increase the risk of chronic diseases. Prolonged under-supply can weaken the immune system and lead to greater susceptibility to infections. Mental health may also suffer, since micronutrients like folate and vitamin B12 play a key role in nervous system function.

Micronutrient deficiencies are often caused by an unbalanced diet, but also by certain lifestyle factors, medical conditions or medication use. Adequate supply is particularly important for children, older adults and pregnant women to prevent growth disorders, developmental issues or pregnancy complications.

Which micronutrients should be taken by age?

The need for micronutrients varies significantly throughout life, as each age group has specific physiological requirements. A balanced diet generally provides the basis for nutrient supply. Nevertheless, dietary supplements can be useful during certain life stages to prevent deficiencies or meet special needs.

Children and adolescents need nutrients that support growth and development. Vitamin D plays a crucial role in bone formation and strengthens the immune system. Calcium contributes to the stability of bones and teeth, as bone density is highest during this stage. Iron is essential for blood formation, especially in girls during puberty, whose needs increase with menstruation. Iodine supports thyroid function, important for metabolism and cognitive development. Omega-3 fatty acids also promote brain development, while zinc strengthens immune defence and supports cell growth.

In adulthood, maintaining energy balance, metabolism and vitality, and preventing deficiencies are priorities. Vitamin D remains an essential nutrient, particularly for people with low sun exposure. Women of childbearing age benefit from adequate folate intake, which supports cell division and helps prevent neural tube defects in newborns. Magnesium regulates muscle function and helps manage stress. Vitamin C strengthens the immune system and improves iron absorption. Antioxidants such as vitamin E protect cells from oxidative stress and support skin health.

As people age, the body's needs change again. Seniors often require more vitamin B12, as absorption capacity decreases with age. This nutrient is essential for blood formation and neurological health. Calcium and vitamin D are vital for maintaining bone density and preventing osteoporosis. Omega-3 fatty acids have anti-inflammatory effects, support heart health and promote cognitive function. Zinc and selenium strengthen the immune system and protect against oxidative stress. Vitamin C supports wound healing and general cell protection. In addition, fibre is important because it regulates digestion and promotes gut health.

Pregnant and breastfeeding women have increased nutrient needs to maintain their health and that of their child. Folate is essential for the development of the foetus' neural tube, while iron supports increased blood production. Iodine promotes brain development in the child and supports metabolism. Omega-3 fatty acids, especially DHA, are essential for the development of the baby's brain and eyes.

Besides age-related differences, particular life circumstances can also influence micronutrient needs. Those who practise sport intensively benefit from magnesium, which prevents muscle cramps, and zinc, which supports recovery. Vegans should monitor adequate intake of vitamin B12, iron, zinc and omega-3s, as these nutrients are often less abundant or less bioavailable in plant foods. Chronically stressed individuals have an increased need for B vitamins, which support nervous system function and contribute to energy production.

Can micronutrients cause weight gain?

Micronutrients can indirectly contribute to weight gain when they are lacking in the body. A deficiency in key vitamins and minerals disrupts metabolism and can lead to food cravings and uncontrolled eating behaviour. Magnesium and vitamin D are particularly involved in regulating blood sugar and insulin. A deficiency in these nutrients can impair insulin sensitivity and contribute to insulin resistance. This promotes fat storage and can ultimately lead to weight gain.

Furthermore, micronutrients are crucial for fat burning and energy metabolism. If the body is not sufficiently supplied with vitamins and minerals, hormone production that supports fat breakdown is disturbed. This can make it harder to lose weight or reduce existing body fat. Micronutrients such as selenium and carnitine support healthy weight regulation by suppressing appetite and stabilising blood sugar.

How to ensure you get enough nutrients: useful tips

• Determine your individual nutrient needs. Consider factors such as age, sex, lifestyle and health specifics. Use blood tests to target and correct any deficiencies.
• Eat a varied diet with at least three handfuls of vegetables and two handfuls of fruit per day. Complement your meals with whole grains, legumes and various protein sources like fish, tofu or eggs to supply your body with a broad range of nutrients and help prevent deficiencies.
• Parsley, coriander and basil are rich in vitamin C and minerals and are ideal as a daily addition.
• Reduce consumption of fast food and ready meals, as these are often calorie-dense but nutrient-poor.
• Include healthy fats. Use plant oils such as flaxseed, olive or rapeseed oil to obtain unsaturated fatty acids and fat-soluble vitamins.
• Prepare food gently. Avoid excessive heat to minimise the loss of vitamins and minerals. Steaming or gentle cooking is recommended.
• Use dietary supplements selectively. Supplement your diet if necessary with vitamins such as B12 or D, especially for certain lifestyles like veganism.
• Pay attention to nutritional information. Read food labels to better assess sugar, salt and nutrient content.
• Eat mindfully. Take time for your meals, chew consciously and enjoy to promote better digestion and greater awareness of healthy eating.

Micronutrients are indispensable for the smooth functioning of our bodies and support many important processes. A conscious diet that provides these nutrients in sufficient amounts is therefore essential for health and vitality.