Hibiscus sabdariffa is a plant considered safe in common food
amounts. As a tea, it may be beneficial for high blood
pressure.
The fruit acids in Hibiscus sabdariffa might work like a
laxative. Other chemicals in Hibiscus sabdariffa might be able
to lower blood pressure, reduce levels of sugar and fats in the
blood, reduce swelling, and work like antibiotics.
People use Hibiscus sabdariffa for high blood pressure, high
cholesterol, and many other conditions, but there is no good
scientific evidence to support most of these uses.