Some users believe algae strengthens the immune system. The color of algae is related to the spectrum of light available to the plants for photosynthesis. The BGA and green algae include most of the freshwater forms, like pond scum, which is a green slime found in stagnant water. Red marine algae, referred to as 'superfood', is noted to be a source of nutrients and botanically based medicines. It's said that each algae's variety exhibits a distinct nutrient profile.
Many people believe seaweed is useful for lowering blood levels of fat and cholesterol.
Seaweed has been used in food processing and as a food staple for decades. Commercial agar is obtained from a red alga. Algae proponents claim a compound found in BGE has anti- HIV activity. It's not known whether this activity would be available from oral consumption of the algae. Spirulina is marketed for weight loss, diabetes, hypoglycemia, degenerative conditions, malnutrition, and alcoholism.