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Old 05-06-2011, 06:05 PM   #1
JonK331
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Default Adding Zinc

Happy Friday All,

So I've been reading the new yeast book and it states that the only nutrients wort does not have for fermentation/yeast health are oxygen and zinc. Obviously most of us add oxygen in one form or another but how many actually add zinc and if you do, what form do you use? Can I just grind up a zinc vitamin and add it to the boil? How much would I add? Say per 5 gallons?



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Old 05-06-2011, 07:44 PM   #2
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If you're yeast have been doing fine without it before now, I'd say skip it. Who knows what kind of unintended effect it might have?



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Old 05-06-2011, 07:56 PM   #3
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Well sure, I've made over 60 batches without it but when Chris White and Jamil say something I tend to listen. Does anyone know if Servomyces contains zinc?

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Old 05-06-2011, 08:09 PM   #4
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Are you sure you read it right?

Everything I've read (admittedly not much) says there is enough zinc extracted from the brewing process for proper yeast growth, and this is what we find in all of our processes (i.e. I don't add zinc, you don't add zinc, yet we still make able to make beer, right?).

There is mention that inadequate zinc levels can cause problems with the yeast, but I've didn't come across where this has actually been an issue. I believe one of the ideas behind yeast nutrient (its basically yeast/yeast byproduct) is that it has zinc in it from all of the yeast cell bodies in there.

Its suspicious to me that JZ/CW would make such a statement like that, but not tell you how to fix the problem. Again, are you sure you read it right?

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Old 05-06-2011, 08:12 PM   #5
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Yeah, if it were something that would really benefit the brew, their highnesses would have already told you how much to add and how to get it in there properly.

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Old 05-06-2011, 09:29 PM   #6
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Wyeast nutrient has zinc in it.

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Old 05-06-2011, 09:39 PM   #7
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i think servomyces contains zinc and it is important for yeast health especially if you're reusing your yeast.
the brewer at the local micro adds it and i have to ask him for the amount again but i seem to remember it being a small percentage of f@$% all,it was a really tiny amount. i'll ask him the next time i see him unless someone else chimes in with the answer.

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Old 05-06-2011, 10:48 PM   #8
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When I get home I'll look up the exact quote and post it.

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Old 05-10-2011, 03:28 PM   #9
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Does anyone know where to find zinc whithout anything else in it? When I was at Siebel, we were told you want about 1 ppm in your wort.

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Old 05-10-2011, 03:53 PM   #10
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Quote:
Originally Posted by indianaroller View Post
Does anyone know where to find zinc whithout anything else in it? When I was at Siebel, we were told you want about 1 ppm in your wort.
I think a better question is: How much zinc ends up in wort from the normal brewing process?

Instead of looking for a product to fix a problem, it might be good to ask if a problem exists in the first place....


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