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Benefits of Spirulina
Though it does taste like pond scum, Spirulina has some great health-boosting qualities:
1. Most Nutrient Dense Food On the Planet
The concentration of protein and vitamins in Spirulina has led many to classify it as the “most nutrient dense food on the planet.” Compared to other foods gram for gram, it lives up to this reputation and is a great source of:
Protein: It is considered a complete source of high-quality protein and is often compared to eggs for the amount of protein per gram. The protein in Spirulina is highly usable and has a net protein utilization rate of between 50-61%
Vitamin B1: Also called Thiamin, this vitamin is necessary for the digestion of fats and proteins. It is often taken for increased energy, eye health, brain function and for improving nerve functioning.
Iron: Spirulina is a favorite food for vegetarians and vegans because it is one of the best plant sources of iron. Even for those who consume meat, it has a highly absorbable form of iron that is gentle on the digestive system.
Calcium: Spirulina is also incredibly high in calcium with over 26 times the calcium in milk.
Spirulina is a great source of other nutrients including (according to Wikipedia): “It contains vitamins B-1(thiamine), B-2 (riboflavin), B-3(nicotinamide), B-6 (pyridoxine), B-9 (folic acid), vitamin C, vitamin D, vitamin A and vitamin E. It is also a source of potassium, calcium, chromium, copper, iron, magnesium,  manganese, phosphorus,  selenium, sodium and zinc. Spirulina contains many pigments which may be beneficial and bioavailable”.
2. Contains Gamma Linolenic Acid (GLA) & Omega-3s
Spirulina is 65% protein and amino acids including the essential fatty acid gamma linolenic acid (GLA) which has gotten a lot of attention for its anti-inflammatory properties, especially when taken with other quality Omega-3 supplements.
GLA is difficult to find in a food source and normally has to be created by the body. Spirulina is one of the few foods with a natural GLA content.
I suspect that the benefits of GLA in Spirulina are even more than what the studies have found since these studies often use vegetable oils for their GLA source, and the other inflammatory compounds in vegetable oils can interfere with the anti-inflammatory ability.
Besides GLA, Spirulina also contains Omega 3-,6 and 9s and is especially high in Omega-3s.
3. May Help Balance Blood Sugar
Studies show that spirulina may be especially helpful in balancing blood sugar, and may even be as effective as diabetes medication in some instances. Other Studies show that it not only lowers blood sugar but may also lower HbA1c, which is a long term marker of blood sugar levels.
4. Powerful Antioxidants
Antioxidants are powerful substances that protect our cells from damage. Thanks to decades of research, many of us understand the importance of consuming enough antioxidants from natural sources, and spirulina is a great choice.