<p><span style="line-height: 107%;">Bok choy (<i>Brassica
rapa </i>L) is a vegetable group of <i>Brassicaceae </i>which still a family with Chinese
vegetables. It contains phytochemical substances such as carotenoids, </span><span lang="EN" style="line-height: 107%;">β-carotene</span><span style="line-height: 107%;">, and glucosinolates which are a source of antioxidant. Bok choy can
be processed into juice. The purpose of this research
is to determine the content of the antioxidant activity, fiber, acidity (pH) and population of
lactic acid bacteria in each formulation. The other ingredients added in making
this green juice are yogurt and honey made into 5 formulations. The analysis of
this research was the analysis of antioxidant
activity content using DPPH method (2.2, -diphenyl-1- picrylhydrazyl), crude
fiber contents analysis using gravimetric method, pH analysis using pH meter
and analysis of lactic acid bacteria using spread plate method. The result obtained is the highest content of the
antioxidant activity was found in formulation 5 consist of 30 g yogurt, 15 g
honey and 50 g bok choy with 35,198 ± 0,057%. The content of crude fiber ranged
from (0,447 ± 0,046) g to (0,507 ±
0,058) g. The highest of acidity (pH) is in formulation 1 which consists of 10
g of yogurt, 15 g of honey and 50 g of bok choy at 5,50 ± 0,040. The highest
population content of lactic acid bacteria in formulation 5 consists of 30 g
yogurt, 15 g honey and 50 g bok choy at 2,8 x 106cfu/mL. Therefore, green juice
can be used as functional drinks.</span><br>
</p>