Spirulina Powder By The Vitamin Shoppe 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.

Blue-green algae, also known as cyanobacteria, are a type of aquatic microorganism. The term 'blue-green algae' can refer to many different types of algae, including Arthrospira genus, which is known as spirulina, and Aphanizomenon flos-aquae, commonly known as 'Klamath', as it is found in Klamath Lake, Oregon. Blue-green algae contain several different nutrients, including vitamins A, B6, B12, E, and K, iron, manganese, zinc, sodium, potassium, phosphorus, calcium, magnesium, copper, selenium, and chromium. Blue-green algae have been shown in some samples to be contaminated with several types of toxins, including microcystins and heavy metals, so it is important to only take supplements that are properly tested, processed, and produced.