Bamboo Salt Rich in Magnesium

Magnesium ions are essential for the cells of all known living organisms. Many enzymes require the presence of magnesium ions for their catalytic action. Plants have an additional use for magnesium in that chlorophylls contain magnesium. The adult human daily nutritional requirement (which depends on various factors including sex and body size) is 300-400 milligrams (mg) per day.
Too much magnesium in the diet can make it difficult for the human body to absorb calcium. On the other hand, inadequate magnesium intake has been associated with muscle spasms, cardiovascular disease, diabetes, high blood pressure, anxiety disorders, and osteoporosis. Acute deficiency is rare, and is more common as a drug side effect (such as chronic alcohol or diuretic use) than from low food intake per se. The incidence of chronic deficiency, resulting in less than optimal health, is debated.
The Dietary Reference Intake (DRI) upper tolerated limit for supplemental magnesium is 350 mg/day (calculated as mg of Mg elemental in the salt). The most common symptom of excess oral magnesium intake is diarrhea. Given that the kidneys of adult humans excrete excess magnesium efficiently, oral magnesium poisoning in adults with normal renal function, is very rare. Infants have reduced ability to excrete excess magnesium even when healthy, so they should not be given magnesium supplements, except under a physician's care.

Food sources

Magnesium is present in many foods, but it usually occurs in small amounts. As with most nutrients, daily needs for magnesium cannot be met from a single food. Eating a wide variety of foods, including fruits, vegetables, and plenty of whole grains, helps ensure an adequate intake of magnesium. Green vegetables such as spinach provide magnesium because the center of the chlorophyll molecule contains magnesium. Nuts—especially almonds), seeds, and some whole grains—are also good sources of magnesium.
The magnesium content of refined foods is usually low. Whole-wheat bread, for example, has twice as much magnesium as white bread because the magnesium-rich germ and bran are removed when white flour is processed.
Water can provide magnesium, but the amount varies according to the water supply. "Hard" water contains more magnesium than "soft" water. Dietary surveys do not estimate magnesium intake from water, which may lead to underestimating total magnesium intake and its variability.
The following figures indicate the amount of magnesium in some foods:

• spinach (1/2 cup): 80 mg
• peanut butter (2 tablespoons): 50 mg
• black-eyed peas (1/2 cup): 45 mg
• milk: low fat (1 cup): 40 mg

Adapted from:
http://www.newworldencyclopedia.org/entry/Magnesium
http://appgargle.com/haioputraheights10/