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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]]

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.

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.

Ubiquinol is the active, reduced form of Coenzyme Q10 (CoQ10) and ranks among the most powerful fat-soluble antioxidants in the human body. It plays a central role in cellular energy production and simultaneously helps protect cells from oxidative stress. Ubiquinol is particularly relevant for cardiovascular health and general vitality. The body's natural Ubiquinol level declines with age, making targeted supplementation of interest for certain population groups.

L-tryptophan is an essential amino acid that the body cannot produce on its own and must therefore obtain from food. It is considered a precursor to the neurotransmitter serotonin and the sleep hormone melatonin. In this guide, you’ll learn how tryptophan works in the body, which foods contain it, what to keep in mind regarding dosage, and what known interactions exist.

Milk thistle is one of Europe's most traditional medicinal plants, with a history of use spanning more than 2,000 years. The active compound complex it contains — known as silymarin — is today the subject of numerous scientific studies, particularly regarding its role in liver health and antioxidant protection. This guide summarises the current state of research in a clear and accessible way.

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.

Ashwagandha (Withania somnifera), also known as Indian ginseng, winter cherry or sleepberry, is a medicinal plant from the nightshade family (Solanaceae) with over 3,000 years of use in Ayurvedic medicine. In Ayurveda it is classified as a 'Rasayana' — a rejuvenating tonic said to promote vitality, longevity and stress resilience.

Biotin, also called vitamin B7, is a water-soluble vitamin and part of the vitamin B complex. The B vitamins are required in particular for the function of the metabolism, the nerves, the digestion and for the heart / circulation.

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.