Spirulina is a type of blue-green algae that is rich in protein,
vitamins, minerals, carotenoids, and antioxidants that can help protect
cells from damage. It contains nutrients, including B complex vitamins,
beta-carotene, vitamin E, manganese, zinc, copper, iron, selenium, and
gamma linolenic acid (an essential fatty acid).
Spirulina -- like
any blue-green algae -- can be contaminated with toxic substances called
microcystins. It can also absorb heavy metals from the water where it
is grown. For these reasons, it is important to buy spirulina from a
trusted brand.
Test tube and animal studies suggest spirulina may
boost the immune system, help protect against allergic reactions, and
have antiviral and anticancer properties. However, there is no proof
that spirulina has these, or any, benefits in people. More research is
needed.
Immune Support
A number of animal
and test tube studies suggest that spirulina increases production of
antibodies, infection-fighting proteins, and other cells that improve
immunity and help ward off infection and chronic illnesses, such as
cancer. However, it has not been tested in people. In one clinical trial
that involved humans, another type of blue-green algae called chlorella
did not boost the immune response to flu vaccine.
Protein Supplement
Amino
acids make up 62% of spirulina. Because it is a rich source of protein
and other nutrients, spirulina has been used as a nutritional
supplement. However, although spirulina contains a certain level of
protein, you would need to take very large quantities to see any effect.
Other sources of protein, such as nuts, legumes, whole grains, and
meat, provide protein in smaller servings.
Allergic Reactions
Animal
and test tube studies suggest that spirulina may protect against
allergic reactions by stopping the release of histamines, substances
that contribute to allergy symptoms, such as a runny nose, watery eyes,
hives, and soft-tissue swelling. But whether these preliminary studies
will help people with allergies is not known.
Antibiotic-related Illnesses
Although antibiotics destroy unwanted organisms in the body, they may also kill "good" bacteria called probiotics, such as Lactobacillus acidophilus. This can cause diarrhea. In test tubes, spirulina has boosted the growth of L. acidophilus and other probiotics.
Source https://umm.edu/
