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Caffeine is a stimulant that acts on the central nervous system, well-known for its ability to ward off drowsiness and restore alertness. It ranks as one of the most commonly consumed psychoactive substances globally. Present in a variety of consumables such as...

Wasserminze, or water mint, is a perennial herb belonging to the Lamiaceae family, which includes many aromatic herbs such as basil and lavender. It thrives in wet habitats across Europe, North Africa, and West Asia, often carpeting the edges of streams, ponds, and...

Tyrosine is a non-essential amino acid that plays a critical role in the production of several important neurotransmitters in the human body, including dopamine, noradrenaline, and adrenaline. While it is synthesised within the body from another amino acid called...

Taurine is often labelled as a 'conditional amino acid', occurring naturally within the human body and playing a crucial role in a variety of biological processes. Unlike essential amino acids, which must be obtained from the diet, the human body can synthesise...

Theanine, also known as L-theanine, is a unique amino acid predominantly found in the tea plant, Camellia sinensis, with higher concentrations typically discovered in green tea leaves. This natural compound has been studied for its potential to promote relaxation...

Tryptophan is an essential amino acid that plays a pivotal role in various biological processes. It is a fundamental building block for protein synthesis within the human body. As an essential amino acid, tryptophan cannot be synthesised by the human body and must be...

Guarana, a plant native to the Amazon basin, is a climbing shrub recognised primarily for its fruit, which is about the size of a coffee berry. The plant has been historically used for its stimulating properties, owed largely to its high caffeine content, often...