Abstract :
Diabetes mellitus is one of the most risky comorbid diseases and worsens
the infected person COVID-19. Blood sugar control is very important to maintain
the body's immune system. Natural medicine for anti-diabetes is more popular
with the public. This research was conducted to determine the ethanol extract of
black lanang onion tubers (Allium sativum L.) has the ability to reduce glucose
levels by 50%. Black lanang onion tubers (Allium sativum L.) macerated with
70% ethanol. The results showed that black lanang onion tubers contained
flavonoids, polyphenols and saponins. The study of antidiabetic activity used the
Nelson-Somogy method using a UV-Vis spectrophotometer instrument with
operating time after heating for 25 minutes and a wavelength of 746 nm.
Measurement of the decrease in glucose levels using five concentrations of 1 ppm,
2 ppm, 3 ppm, 4 ppm, 5 ppm. The results showed ethanol extract of black lanang
onion tubers (Allium sativum L.) has a very strong ability to reduce glucose levels
with an EC value of 3.8790 ppm and %KV of 0.6368%.