Rose Root (Rhodiola Rosea): Safety Assessment

The German Federal Institute for Risk Assessment (BfR) has conducted a risk assessment for Rhodiola rosea and concluded that there is no hazard potential at daily doses of 100-1,800 mg of rose root (mostly as root extract) Rose root contains, among other substances, the cyanogenic glycoside lotaustralin. When the plant is injured, cyanides (salts of … Rose Root (Rhodiola Rosea): Safety Assessment

Melatonin: Definition, Synthesis, Absorption, Transport, and Distribution

Melatonin (N-acetyl-5-methoxytryptamine) is a hormone of the pineal gland, a part of the diencephalon. It is produced by the pinealocytes in the pineal gland. Melatonin promotes sleep and controls the day-night rhythm. Synthesis Melatonin is produced from the essential amino acid tryptophan via the intermediate serotonin. Synthesis proceeds as follows: L-tryptophan is converted to 5-hydroxytryptophan … Melatonin: Definition, Synthesis, Absorption, Transport, and Distribution

Melatonin: Functions

The action of melatonin at the cellular level occurs through two distinct regulatory circuits, two of which are of paramount importance. These are G protein-coupled melatonin receptor 1 (MT1) and melatonin receptor 2 (MT2), which is also G protein-coupled. MT1 influences reproduction (reproduction), metabolism (metabolism) and vasoconstriction (vasoconstriction); MT2 is required for the transmission of … Melatonin: Functions

Melatonin: Interactions

Because melatonin is metabolized primarily by CYP1A enzymes, it may interact with drugs that are also metabolized by or inhibit CYP1A. CYP1A inhibitors include estrogens in the form of contraceptives and hormone replacement therapy (HER) or the antidepressant fluvoxamine. Simultaneous use of melatonin with CYP1A inhibitors results in melatonin excess. Nicotine abuse, in turn, reduces … Melatonin: Interactions

Choline: Functions

Choline or its derived compounds play an essential role in many physiological processes: Phospholipids, especially phosphatidyl choline (PC), are found in large quantities in all biological membranes. There, they play an important role in their structure and functions, such as the transmission of signals and the transport of substances. Metabolism and transport of lipids and … Choline: Functions

Choline: Interactions

Folate Homocysteine can be remethylated to methionine in two different ways – Folate is important for one pathway and choline for the other. In the first case, homocysteine is methylated to methionine (addition of CH 3 groups) by the enzyme methionine synthase. For this process, methionine synthase requires methyl tetrafolate as a methyl group donor … Choline: Interactions

Choline: Safety Assessment

The American Institute of Medicine (IoM) established an intake of 7.5 g of choline/day as the lowest evaluated intake level that produced an adverse effect (LOAEL), and on this basis, as well as taking into account a safety factor and rounding, established a so-called Tolerable Upper Intake Level (UL). This UL reflects the safe maximum … Choline: Safety Assessment

Choline: Supply Situation

In their study, Vennemann et al recorded the average choline intake of Europeans. This is between 244-373 mg/day in young adults (10-18 years), 291-468 mg/day in adults in the range (18-65 years), and 284-450 mg/day in older individuals. They compiled, based on the results of 12 European studies, an overview of total choline intake in … Choline: Supply Situation

Choline: Intake

To date, there are no intake recommendations (D-A-CH reference values) for choline intake from the German Nutrition Society (DGE). The European Food Safety Authority (EFSA) published adequate intakes for choline in 2016, which can be considered as European reference values: Adequate intakes Age Choline (mg/day) Infants 7-11 months 160 Children 1-3 years 140 4-6 years … Choline: Intake