Broccoli Seed Extract
Broccoli seed extract is made from broccoli seeds, which contain glucoraphanin. The enzyme myrosinase converts it into sulforaphane.
What it is studied for
The strongest rated effects first. Bars show the size of the effect, the letter grades the evidence, and each rating lists the studies behind it.
What is the active ingredient?
Broccoli seeds contain glucoraphanin, a precursor converted into sulforaphane with help from the enzyme myrosinase. Human experiments show that active myrosinase changes how much sulforaphane becomes available. 1
Why people take it
SuppCo community snapshot, 2026-09-28. Reasons for use are not evidence that it works.
Questions people ask
Are glucoraphanin and sulforaphane interchangeable?
No. Glucoraphanin is the precursor, and conversion depends partly on myrosinase activity. 1
Does the sprout trial prove seed extract protects the liver?
No. It tested a different preparation and measured liver enzymes, not prevention of liver disease. 2
Grape Seed Extract