I went searching for glucoraphanin in bulk and found that Powder City was experiencing poor sales of the product and is liquidating their supply at a low price. My only concern is the shelf-life.
I purchased this > Broccoli Extract Powder from Bulk Supplements 500g @ $25.96 a while ago. Nothing about Sulforaphane or glucoraphanin or extract ratio. But the serving size is 500mg and the pkg continues with "Any increased dosage should first be discussed with a physician". No mention of glucoraphanin.
Now Powder City has something on sale... Broccoli Sprout Extract Powder 20:1 62.5g @ $2.51 and says it contains glucoraphanin, but not exactly how much. It uses a 250mg serving size, with no warning about larger doses.
Neither say precisely how they were produced, which makes a difference in what active components remain after processing. I find that discouraging and all the more frustrating when trying to figure out what and how much to take to get an 'effective' dose, whatever that is! The B.S. powder is normal tasting, and easy to take, but I wonder where they get their recommended serving sizes from? It would be easy to take a LOT more!
So I also ordered Sprout Living, FD Sprout Mix, Broccoli & Kale Fresh Freeze Dried, Enzymatically Active, 100% pure Sprout Powders. It says it contains "Countless Beneficial plant compounds including isothiocyanates, glucosinolates, and sulforaphane". It also doesn't say how much of each, but as it is 'raw' it may be closer to what is needed for a good dose. This one has a 3.5g serving size, and also tastes normal, not bad. I intend to mix the Bulk Supplements and the Sprout Living to be sure of getting 'something' useful. But again, the varying serving sizes make it hard to compare, and I wonder why they are so different, or does it even matter?
It's still a crap shoot.