Method for preparing fresh chlorella drink and use of the fresh chlorella drink

A method for preparing a fresh Chlorella drink, comprising the steps of:

• (a) sterilely culturing and stirring Chlorella for not longer than 3 days, until the concentration of the Chlorella is over 0.05% by weight,
• (b) harvesting the culture of Chlorella within 6 hours;
• (c) cooling the harvested culture obtained in step (b) to lower than 1° C. but not to a frozen state, then
• (d) centrifuging the cooled culture obtained in step (c), and
• (e) adding sterile water to obtain a Chlorella suspension, wherein the concentration of the Chlorella is from 2.5 mg/ml to 12.5 mg/ml;
• and
• (f) freezing the Chlorella suspension obtained in step (e) to be completely frozen for 12 hours to 24 hours and then
• (g) increasing the temperature to 40° C. to 50° C. within 10 minutes to obtain the fresh Chlorella drink.