Kalsec Craft Brew Solutions Hopfenatic8482; Advanced Hop Extract [Liquid, 8 Oz. Bottle]

Used this in a batch of IPA where it didn't have much of a nose. I added 1ml to 5 gallons, a little lower than the recommended amount.The nose improved dramatically. Even added nice hop flavor.Why the low rating? Every time I drink even 8oz of the beer with this product, I develop a massive headache. I never get that with any of my other beers. Maybe it's the polyethylene glycol in it?

When paired with a hoppy beer, this increases perceived bitterness. The aroma intensifies the bitterness in a non-offensive way. On a beer which has low hops, this only adds a Amarillo like floral aroma. Very different than trophopicol which actually adds bitterness in my opinion.