Clean Spirulina is cultivated in fresh potable water from Hawaiian aquifers and ultra-pure, deep ocean water containing 94 trace minerals & elements. A daily intake of 3 grams per day can be obtained with six 500 mg tablets per day.
If you have never taken BlueGreen Algae (BGA), then BioExperience® suggests that you start with one or two tablets per day. After you are comfortable with small amounts of BGA, slowly increase to the suggested maximum of 3 grams per day for BGA.
References
Bachstettler, Adam D. et al. (2010) Spirulina Promotes Stem Cell Genesis and Protects against LPS Induced Declines in Neural Stem Cell Proliferation. Plos One. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2864748/
Ku, C.S., Yang, Y, Park, Y, & Lee (2013) Health Benefits of Blue-Green Algae: Prevention of Cardiovascular Disease and Nonalcoholic Fatty Liver Disease. Journal of Medicinal Food 2013 Feb; 16(2): 103-111. Available: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3576896/