The invention discloses a formula and making method of
radiation-resistant blueberry composite residue-free
instant tea special for astronauts. The
radiation-resistant blueberry composite residue-free
instant tea can be used as a daily health-care beverage of the astronauts. The
instant tea is processed from main raw materials of
green tea powder, a
blueberry extract, a spirulina extract, a citrus extract, a Chinese wolfberry fruit extract, a
ginseng extract, a glossy
ganoderma extract, a poria cocos extract, strawberries, carrots, haws,
xylitol and
maltodextrin. According to the making method disclosed by the invention, vacuum freeze-
drying is combined with a room-temperature wet method
granulation technique, and homogeneous instant tea granules are obtained. The harm of
active components in the raw materials can be effectively avoided, the
flavor of the instant tea is furthest reserved, and the instant tea is convenient to preserve and eat. In addition,
green tea instant
powder obtained through working procedures of
ethanol reflux extraction,
polyacrylamide purification, decompression vacuum concentration and
freeze drying is favorable in
solubility and pleasant in color and
flavor. The instant tea not only can be used as a
functional health-care beverage special for the astronauts but also can be used as a daily protection food for
crowds under
radiation environment.