Subject: Yeast Nutrient Composition
From: Mark Evenson <wine-hop at dnvr.uswest.net>
Date: Mon, 01 Dec 1997 13:04:56 -0800
For the person with the question on chemical composition of yeast
nutrient: Three of the largest homebrew/winemaking wholesale suppliers
use varying formulas in their "house brand". Your local homebrew shop
should be able to identify their source (especially if you're willing to
share your info).
L.D. Carlson (Kent, OH) food-grade urea and diammonium phosphate; white
in color with fairly large, rounded granules
G.W. Kent (Ann Arbor, MI) these folks have two types
- -"Nutrient" diammonium phosphate; white, small crystals similar in size
to sugar crystals (though more long than square)
- -"Energizer" diammonium phosphate, yeast hulls, magnesium sulfate,
thiamine, folic acid, niacin, calcium pantothenate; small tan grains
with some white particles visible. I believe this is from Lalvin.
Crosby & Baker (Westmort, MA) Fermax(TM) contains diammonium phosphate,
dipotassium phosphate, magnesium sulfate, autolyzed yeast.
also DLB Vineyards (Westlake, OH) diammonium phosphate; white grains.
Sorry for the delay in responding; I wanted to check with the suppliers
listed above to get official permission to post this info. Nobody said
"no" although if you want more detailed info (i.e., what percentage of
each chemical) you should contact your local homebrew shop.