Some authors have broadly shown the nutritional and therapeutic properties of Spirulina in several experimental models, which has led to the use of the alga in different countries at relatively high quantities. This alga produced by two companies in the United States was recently rated GRAS (Generally Recognized as Safe) for use in nutritional bars, drink mixes and snacks, as well a salad condiment and a pasta.90
Spirulina has probably been subject to more toxicology safety studies than any other algae, resulting in a high degree of confidence in its use by humans and animals without running any risk of deleterious effects on health.
Biogenic and nonbiogenic contamination determinations demonstrate that it complies with the greater part of the specifications about permissible limits, either those recommended by international agencies or implied in food legislation.
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All you need is a proper diet of fresh fruits and vegetables and get plenty of exercise and you'll be fine. Ever heard those words from your doctor? If that's all heshe recommends then you're missing out an important ingredient for health that he's not telling you. Fact is that you can adhere to the strictest diet, watch everything you eat and get the exercise of amarathon runner and still come down with diabetic complications. Diet, exercise and standard drug treatments simply aren't enough to help keep your diabetes under control.