Tribulus 1,000 mg By NOW Sports Overview & Drug Interactions

Calcium is a vital nutrient found in various foods such as dairy products, certain vegetables, and many fortified items. Over 99% of the body's calcium is stored in the bones and teeth, predominantly as hydroxyapatite. The remaining calcium circulates in the blood, extracellular fluid, muscles, and other tissues, where it is essential for processes like nerve signaling, muscle contraction, vascular activities, glandular secretion, and maintaining cell membrane and capillary permeability. It also plays critical roles in enzyme reactions, respiration, kidney function, and blood clotting, and is involved in neurotransmitter and hormone release, amino acid uptake, vitamin B12 absorption, and gastrin secretion. Calcium balance changes with age: it is positive during periods of growth, stable in adulthood, and tends to become negative in older age. Calcium loss occurs through feces, urine, sweat, and shedding skin cells. In women, reduced estrogen levels decrease calcium absorption and retention, increase bone turnover, and lead to lower bone mass. Calcium supplements come in various forms, including citrate and carbonate, which differ mainly in their calcium content and absorption rates. Calcium citrate is easily absorbed and can be taken without food, making it suitable for older adults or those with low stomach acid. In contrast, calcium carbonate, which contains a higher percentage of calcium, is best absorbed when taken with meals.

Tribulus is a plant that belongs to the Zygophyllaceae family. It is native to a variety of warm and tropical regions of the world, including Africa, Asia, Europe, and Australia. The plant is known for its spiky, star-shaped flowers and hairy fruit, which contains small, hard seeds. Tribulus is often utilized as an ingredient in dietary supplements and is one of the most commonly used natural medicines in the world. Its most well-known use is as an aphrodisiac, with a purported ability to improve libido and sexual function. It has also been used to boost athletic performance, and reduce inflammation. Most often, it is the leaf, fruit, and root of Tribulus that are used as natural medicine. They contain a number of compounds, including protodioscin, which may influence certain hormones, such as testosterone and dehydroepiandrosterone.