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Fermaid K
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Smart brewers know that a yeast starter is the best way to ensure proper cell count and yeast viability prior to pitching. If you want a reliable starter for your batch of beer, you need to feed the yeast. Adding a yeast nutrient to the starter will give the yeast an added boost! Fermaid K is a yeast nutrient that works for starters and main fermentation. Here’s how it works:
Fermaid K is a complex formula that provides DAP, free amino acids, yeast hulls, unsaturated fatty acids, sterols; and micronutrients such as magnesium sulfate, thiamin, folic acid, biotin, calcium pantothenate, and other vitamins and minerals. Yeast use Nitrogen for protein synthesis and to maintain cellular growth. Nitrogen from the alpha amino acids contained in Fermaid K is utilized much more efficiently than from the ammonia salts like DAP. The unsaturated fatty acids and sterols available in Fermaid K are important survival factors needed to maintain alcohol resistance. They also help keep volatile acidity levels low. The cell wall fractions, available through the included yeast hulls, absorb medium chain fatty acids that are toxic to the yeast. They also provide nucleation sites to help keep the yeast in suspension. You do not need to add any additional fertilizers or DAP when adding Fermaid K. Use approximately 1 gram per gallon. Rehydrate in distilled water.
A rough approximate of weight is 1 tsp = 4.7 grams. We highly recommend using a scale to weigh the product for an accurate dose.
Community Q&A

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Why did you choose this?
MoreFlavor Store
great supplement during fermentation
Doug M on Oct 10, 2018
Heard good things
Zach W on Oct 5, 2018
great supplement during fermentation
Doug M on Oct 10, 2018
have used it before
Raymond K on Oct 9, 2018
Heard good things
Zach W on Oct 5, 2018
Stellar product
Joel S on Oct 4, 2018
must for smooth fermentation
Valued C on Oct 3, 2018
Aid in fermentation
Tony B on Oct 2, 2018
Ran out
Joni S on Oct 1, 2018
More wine recommendation
Lannie S on Sep 25, 2018
Always use in homebrew, prevents incomplete fermentations
Stewart B on Sep 24, 2018
past experience
Steve C on Sep 22, 2018
I have been ising for years with good results. Never had a stuck fermentation or off flavors.
David P on Sep 21, 2018
A friend recommended it. I tried it a month ago and was very pleased
Heath M on Sep 21, 2018
it was recommended by MoreBeer!
James K. R on Sep 19, 2018
Provides an adequate level of N during fermentation of cider
Robert B on Sep 16, 2018
Need a yeast nutrient
Andrew L on Sep 13, 2018
Recommended in wine making information on site
Kevin V on Sep 11, 2018
have used successfully in past years
sam l on Sep 11, 2018
wine fermentation additive
Michael H on Sep 11, 2018
Nutrient for yeast starter
Dennis H on Sep 10, 2018
necessary product
wendy c on Aug 29, 2018
gives fast starting vigorous fermentation
gregory r p on Aug 28, 2018
fermenting redwine
Judy P on Aug 24, 2018
Doug J on Aug 24, 2018
Works for wine production
Steven E on Aug 22, 2018
Have used in the past.
Judy L on Aug 21, 2018
it does a good job keeping my fermentation strong
Andrew E on Aug 18, 2018
I've used it before.
Michael B on Aug 14, 2018
for my yeasts happiness
Donelson L on Aug 14, 2018
great product
Johnny R on Aug 13, 2018
Use in Mead making to keep yeast alive
CBR rider on Aug 9, 2018
try to speed up fermentation to start
Luiz T on Aug 4, 2018
recommended at checkout
Webb G on Aug 1, 2018
Work good
Merritt G on Jul 31, 2018
avoid fermentation problems
Mark T on Jul 25, 2018
Recommended by Scott Laboratories
Paul D on Jul 25, 2018
great product
Dennis H on Jul 23, 2018
yeast gotta eat
Kenneth W on Jun 26, 2018
Rebecca P on Jun 8, 2018
I do yeast starters,
Bert F on Jun 5, 2018
Was told it was better than what I used
Merritt G on May 1, 2018
Always use this.
Jim S on Apr 30, 2018
making a cider
James K on Apr 17, 2018
been using generic nutrient
Nathan J on Apr 16, 2018
Good source of micronutrients for sugar washes
Frank C on Mar 25, 2018
Yeast starter
Bradley P on Mar 22, 2018
Going to give it a try
James B on Mar 20, 2018
Works well in my rum distillary
Monique H on Mar 16, 2018
great stuff, Don 't want to run out.
Jim I on Mar 16, 2018
David V on Mar 2, 2018
A mead recipe called for it
Mark M on Feb 15, 2018
have used it before
Raymond K on Oct 9, 2018
Stellar product
Joel S on Oct 4, 2018

4.6 / 5.0
16 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great product. And it comes in very convenient amounts
July 4, 2018
4 months ago
It works!
My favorite yeast food. Seems to work better than some others, and it doesn't get go bad and clumpy over time. Helps the yeast complete their job.
April 15, 2018
8 months ago
First time
This was the first time I used nutrients in my wine. It is only the second time making wine. Fermaid K seemed to work very well. I had a very quick and active fermentation.
March 23, 2018
8 months ago
Excellent as part of a comprehensive staggered nutrient regiment for mead.
March 7, 2018
7 months ago
Works Great!!!
Works great!! I rely on this product for a healthy fermentation. It arrived quickly! Thanks!!
February 8, 2018
9 months ago
Souvignon Blanc
worked as advertised....perfect.....
January 27, 2018
9 months ago
Works but use Fermaid O instead
This product works to help ferment your mead but my meads improved so much more once I started using Fermaid O instead.
January 24, 2018
9 months ago
Wasn't as effective as I'd hoped
We didn't see much effect by adding this as recommended. We haven't tried to add more than recommended because we haven't been able to brew for several months.
January 23, 2018
9 months ago
Better than aerating for yeast reproduction?
I’ll put a pinch of this in my next starter. Fermaid K reportedly contains unsaturated fatty acids and sterols, which yeast need to reproduce (do budding). Normally, yeast use oxygen to create those molecules, and oxygen is the limiting factor.
In the brew, the yeast have 2 options: 1) make the unsaturated fatty acids and sterols on their own using the oxygen that is available in the aerated brew or 2) use existing fatty acids and sterols, which they prefer.
In short, this nutrient should help my yeast reproduce as much as they want, so I don’t have to really worry about aeration. Besides, too much or too little aeration can be bad.
January 20, 2018
8 months ago
This is a Must for your Must
I dont trust the yeast to make it to the end of my ferment on their own; especially considering the high brix levels that CA fruit tends to come in at these days (25-27 is normal). If you dont feed the yeasts during exponential growth, you risk ending with residual sugars when the colonies die off at 15%abv due to low numbers (of colonists). If you are ameliorating the must to bring the brix down (I dont as I want the fruit to speak for itself), you will still want to feed the troops during exponential growth in order to insure you get the most out of the esters. You can make up for acids but you cannot for color/flavor/nose if you ameliorate. Those happy yeasts will go get those esters even if they have to swim for them. Good stuff - been using Ferm-K for a decade and love how the must perks up a few hours after dosing.
September 29, 2015