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You can measure your vitamin D levels by using a blood test to determine if you have enough vitamin D in your body. In fact, not the active form of vitamin D is measured, but the concentration of 25(OH)D (25-hydroxyvitamin D) in the blood.

Different organizations recommend varying doses of vitamin D. For example, in cases where vitamin D formation through sunlight is deficient, the DGE currently recommends a dose of 400 IU for infants up to 1 year of age and 800 IU for children, adolescents, adults, seniors, and pregnant and nursing women.

Parts of the plant of the Moringa tree, which is particularly widespread in South Asia and Africa, have been used as food and medicine for thousands of years. The high content of nutrients and a proven antioxidant and anti-inflammatory effect make Moringa an important part of the diet and naturopathic treatment of diseases in Asia, Latin America and Africa. In recent years, Moringa has become increasingly popular as a healthy 'superfood' in Europe.

Zinc is an essential trace mineral that contributes to the normal function of the immune system, normal energy metabolism, and the maintenance of normal hair, skin, and nails. Zinc also contributes to normal protein synthesis and the maintenance of normal testosterone levels in the blood.

Collagen is a structural protein found in the bodies of many multicellular animals and therefore also in humans. It is found, among other places, in tendons, ligaments and bones. Parts of the skin are also made of collagen. The substance plays an important role in both medicine and cosmetics: as an ingredient in skin care products and as a dietary supplement to support bone and cartilage tissue.

Recent studies suggest that both vitamin D3 and vitamin K2 may play an important role in bone and arterial health. Insufficient intake of both vitamins is widespread among the Western population—which is why more and more people are taking vitamin D3 and K2 daily as dietary supplements.

Gamma-aminobutyric acid (GABA) is one of the most important inhibitory neurotransmitters in the human brain. This article summarises the current state of research on GABA – from its discovery and biochemical mechanisms to its presence in foods and guidance on supplementation. The information provided here does not replace medical advice.

Coenzyme Q10 (CoQ10) is a naturally occurring compound found in every cell of the human body. It plays a central role in cellular energy production and acts as a powerful antioxidant. While the body produces CoQ10 on its own, production declines with age, making supplementation relevant for many people. This guide provides an evidence-based overview of CoQ10 — what it is, how it works, who may benefit, dosage guidance, and important safety considerations.

Ginseng is one of the best known and most popular medicinal plants in Asia and is also becoming increasingly important in Europe. The versatile effects of the root are increasingly becoming the focus of scientific and medical research. Ginseng is traditionally used to treat menopausal symptoms, memory problems, and erectile dysfunction.

Sleep is essential for physical and mental health. Studies from the Centers for Disease Control and Prevention (CDC) indicate that approximately one in three adults regularly fail to get adequate sleep. Melatonin — a hormone naturally produced by the body — plays a central role in regulating the sleep-wake cycle and is widely used as a dietary supplement.

Magnesium is much more than just a mineral. It is a vital nutrient involved in hundreds of essential processes in the body, from muscle movement and nerve function to energy production and heart health. In fact, magnesium is involved in the formation of more than 300 important enzymes, highlighting its crucial role in overall performance and well-being. It helps relax muscles and prevent cramps, acts as a natural anti-stress agent, regulates blood pressure, and supports a healthy heart rhythm.[[A901]] [[A902]]

L-theanine is an amino acid found naturally in tea leaves (Camellia sinensis). It is best known for being studied in relation to relaxation, stress perception and sleep quality. In this guide, you will find what the research says, how L-theanine may be dosed, and what side effects are known.