Based on information found on Health Line
1.Spirulina is Extremely High in Many Nutrients
A single tablespoon (7 grams) of dried spirulina powder contains:
Protein: 4 grams.
Vitamin B1 (Thiamin): 11% of the RDA.
Vitamin B2 (Riboflavin): 15% of the RDA.
Vitamin B3 (Niacin): 4% of the RDA.
Copper: 21% of the RDA.
Iron: 11% of the RDA.
It also contains decent amounts of magnesium, potassium and manganese, and small amounts of almost every other nutrient that we need.
With only 20 calories, and 1.7 grams of digestible carbohydrate,
gram for gram, this means that spirulina may be the single most nutritious food available on the planet today.
A tablespoon of spirulina contains a small amount of fat (around 1 gram), including both omega-6 and omega-3 fatty acids in about a 1.5:1 ratio.
The quality of the protein in spirulina is considered amongst the best, comparable to eggs. It contains all the essential amino acids that we need.
2. Spirulina Has Powerful Antioxidant and Anti-inflammatory Properties
Phocyanin is the main active compound in spirulina. It has powerful antioxidant and anti-inflammatory properties.
3.Spirulina Can Lower LDL and Triglyceride Levels
Studies have shown that spirulina can lower triglycerides and LDL cholesterol, and sometimes may raise HDL (the “good”) cholesterol.
4. Spirulina Protects LDL Cholesterol From Becoming Oxidized
Fatty structures in the body can become oxidized, which can fuel the progression of many diseases. The antioxidants in spirulina can help prevent this from happening.
5. Spirulina May Have Anti-Cancer Properties, Especially Against Oral Cancer
Spirulina may have some anti-cancer properties, especially against a type of precancerous lesion called OSMF (oral submucous fibrosis).
6. Studies Show Spirulina May Reduce Blood Pressure
In one study, a higher dose of spirulina has been shown to lead to lower blood pressure levels, a major risk factor for many diseases.
7. Spirulina Improves Symptoms of Allergic Rhinitis
Spirulina supplements have been shown to be very effective against allergic rhinitis, helping to reduce various symptoms.
8. Spirulina May be Effective Against Anemia
One study shows that spirulina may be effective against anemia in the elderly. More research is needed.
9. Muscle Strength and Endurance May Improve
Some studies have shown that spirulina supplementation can enhance endurance, and one study shows that it can increase muscle strength.
10. Spirulina May Help With Blood Sugar Control
Animal studies have shown that spirulina can significantly lower blood sugar levels.
In some cases, it has outperformed popular diabetes drugs, including Metformin.
There is also some evidence that spirulina can be effective in humans.
In a study of 25 patients with type 2 diabetes, 2 grams of spirulina led to an impressive reduction in blood sugar levels.
HbA1c, a marker for long-term blood sugar levels, decreased from 9% to 8%, which is substantial. Studies estimate that a 1% reduction in this marker can lower the risk of diabetes-related death by 21%.
However, this study was small and only lasted for 2 months, so take this with a grain of salt.