Many people are aware of the health benefits of wheat germ. It has all sorts of stuff that helps humans. Many of those same things are great for yeast. Here's an overview.
First, what is the "germ?" Basically, it's the embryo of the seed. It composes only about 3% of the grain's total weight (if you include the husk, the bran, etc). But it's packed with good stuff.
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Here's a list of the vitamins and minerals that are needed for proper yeast nutrition along with the approximate amounts of each that are contained in our 12 oz. of wheat germ
Component 
Weight (mg) 
How yeast uses it 
Nitrogen see below Energy source 
Phospate 
2900 
Cell membrane development, cell metabolism 
Potassium 
3075 
Utilization of phosphate 
Biotin (vitamin H) 
0 
Synthesis of proteins, fatty acids, nucleic acids 
Panothenic acid (Vitamin B5) 
7.8 
Metabolism of sugars and lipids 
Thiamin (Vitamin B1) 
6.6 
Cell growth 
Riboflavin (Vitamin B2) 
1.8 
Cell growth 
Niacin (Vitamin B3) 
23.4 
Cell wall support 
Inositol 
0 
Cell division 
Calcium 
135 
Mineral, general cell health 
Copper 
3.6 
Mineral, general cell health 
Manganese 
46 
Mineral, general cell health 
Zinc 
42 
Mineral, general cell health 
Now, we know about yeast and its need for free amino nitrogen (FAN). The germ itself doesn't contain any. However, a more general term, yeast assimilable nitrogen (YAN) is more appropriate in our case. YAN is the combination of ammonia and free amino acids that are metabolically available to yeast. Basically, yeast can assimilate nitrogen from both inorganic (ammonia -- like from DAP) and organic forms (amino acids). The most notable for yeast is arginine. The good news is that our 12 oz. of wheat germ contains a whopping 6.4 grams of arginine. So we should be adequately covered on this front.
So you can see that wheat germ is like a multi-vitamin for yeast. At approximately 3 USD/lb (you can probably get is cheaper), why ever bother with a turbo again? It's all natural, has lots of great stuff, and if you don't use it for your hobby, you can toss some in with the next batch of cookies you make or sprinkle it on your oatmeal.
Edited by moderator Sunday, January 04, 2015 11:30:56 AM(UTC)
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