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Fermaid O
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Fermaid O is a newer formulation of the same Fermaid K that winemakers everywhere have learned to trust their ferments to. The main difference in composition between the two, is that the Fermaid O has replaced the inorganic DAP with an organic source. In terms of how this benefits the winemaker, there are several points!


  • Organic Nitrogen is easier for your yeast to digest, resulting in a smoother, more consistent fermentation.
  • Fewer fermentation spikes means better yeast health, and the ability to ferment to its full capacity.
  • Compared to DAP, Fermaid O will result in lower heat output from the yeast, and lower levels of negative sulfur compounds.

This is a nutrient which will boost the quality of wine, regardless of process. Lower heat production, less negative flavor compounds, better overall fermentation kinetics and flavors!

To Use:
Use at a rate of 1.5g / gal of must/juice.

Community Q&A

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Browse 1 question Browse 1 question and 31 answers
Why did you choose this?
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yeast food
Jason W on Aug 10, 2018
Good product
Valued C on Aug 4, 2018
yeast food
Jason W on Aug 10, 2018
love it
Valued C on Aug 10, 2018
Good product
Valued C on Aug 4, 2018
recommended at checkout
Webb G on Aug 1, 2018
trying this
Jim S on Jul 31, 2018
gino p on Jul 24, 2018
Good nutrient supplement
Frank F on Jul 24, 2018
generic yeast nutrient mid fermentation
ALEXEY S on Jul 24, 2018
Supplement BM 4x4
Timothy J G on Jul 21, 2018
nutrient for Montrachet
Valued C on Jul 17, 2018
This nutrient is supposed to have more organic nitrogen sources and be better for the beer.
Philip V on Jul 16, 2018
normally use fermaid K and decided to switch to fermaid O after reading others comments.
Dean T on Jul 11, 2018
To save a stuck fermentation
Kenneth H on Jul 11, 2018
works well, don't forget to use more if you are making a traditional mead!
Micah E on Jun 30, 2018
Primary nutrient at pitching for mead must.
Roman Y on Jun 26, 2018
mead recipe called for it
E. S on Jun 8, 2018
mead recipe
Frank on May 29, 2018
This is essential
robert f on Apr 18, 2018
No problems at the end of fermentation, yeast can still assimilate it.
Craig E on Apr 3, 2018
Good YAN source for sugar washes
Frank C on Mar 25, 2018
ran out of my stock at home
carl w on Mar 16, 2018
need nutrient, and no DAP
David M on Mar 6, 2018
Better than fermaid K
Roger Taylor on Feb 24, 2018
Needed for mead recipe
Donald M on Feb 15, 2018
For Mead Making
Valued C on Feb 2, 2018
To make fast, clean mead
John A on Jan 30, 2018
I read that yeast handle this better than the inorganic sources of nitrogen.
Chris D on Jan 25, 2018
recommended at cider days as a good ferment nutrient
Butternut Farm L on Jan 25, 2018
To feed my mead
Brandon H on Jan 17, 2018
For mead nutrients
Danielle S on Jan 15, 2018
Yeast starter for out of date yeast
Mark A P on Jan 12, 2018
love it
Valued C on Aug 10, 2018
recommended at checkout
Webb G on Aug 1, 2018

4.9 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Fermaid O
Thanks for the fast service! This nutrient did what was supposed to do! thanks!
July 6, 2018
2 months ago
Highly recommended for cleaner faster drinking mead with staggered nutrient additions
February 22, 2018
6 months ago
Working as expected so far
I'm using the Fermaid O as my sole nutrient in the mead. Way to early to judge how it will come out, but it seems to be fermenting as expected.
February 20, 2018
6 months ago
Great product. Does the job, and it’s organically derived.
January 31, 2018
7 months ago
fermaid o 120 g
product as described, fast shipping
January 28, 2018
7 months ago
Major Improved Mead Fermentation
This product has been the biggest improvement in my mead fermentations so far. I first used this with DAP but have recently moved to an all Fermaid O fermentation and my meads have never been this clean tasting so early. I cannot recommend this product enough.
January 24, 2018
6 months ago
Just what the doc ordered
This product does very thing it says it does. I would risk fermenting without it!

August 30, 2017
great product but beware...
Great product but keep it away from your cats! Two years in a row our cats have pulled this out of a box and gone nuts with it ripping the bag open and spreading it all over the place. It seems to have a more powerful draw than catnip.
October 11, 2016