Spirulina platensis is a kind of ancient livings for a 3.5 billions years, and had been recognized as a kind of space food by National Aeronautics and Space Administration(USA) because of containing numerous nutrients, especially vitamin B and beta-carotene. Beta-carotene would convert into vitamin A and help keep health vision, skin, and mucosa. With a rich source of vitamins B, especial B12 which is almost only in meals (animal livers), 1.2 grams of Spirulina platensis daily uptake would be sufficient for a human daily need, and also be a very good source for vegetarians. The investigators add the B12 test in this trial as a secondary endpoint to help monitor the absorption rates of the Spirulina platensis in human. Otherwise, the plant pigments in Spirulina platensis would also have many bioactivities on human healthy. Among these bio-activities of Spirulina platensis would contain anti-virus, anti-cancer, immune modulation, anti-inflammation, anti-oxidant, improve liver abnormality, and liver cirrhosis abilities. As previous small scale of clinical trial results in HBV patients provided by Far East Bio-Tec Company, lamivudine combined with oral Spirulina platensis would also improve the sero-conversion rates of HBeAg.