Bilberry Extract 50 mg By Source Naturals 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.

Bilberry is a small, perennial shrub that belongs to the Ericaceae family and is native to Europe, the northern United States, and Canada. It is known for its small, dark purple berries, which are similar in appearance to blueberries. The name bilberry is derived from the Danish word 'bollebar', meaning "dark berry". Bilberry is high in antioxidants, including flavonoids, and are a good source of vitamins and minerals, including vitamin C, vitamin E, and manganese. Bilberry has a long history of use in traditional medicine and is claimed to have a number of potential health benefits, including improving vision, reducing inflammation, and treating diarrhea.