Best yeast energizer for beer brewing

best yeast energizer stalled fermentation

How to fix a stalled fermentation with Yeast Energizer


Yeast is the 'live' part of part of beer.

It's a living organism and just like your friends, you gotta treat them right. If the yeast is going to turn your wort's sugars into alcohol, it's going to need a nice home where it feels comfortable.

If you think your yeast might need a helping hand either at the beginning of fermentation or due to a stalled fermentation then a 'yeast energizer' might just be the extra ingredient you'll need to add to your brew day shopping list.

What are yeast energizers and why use them?


At it's most basic description, a yeast energizer serves two purposes - they are used to stimulate or restart a stalled fermentation.

The effect they have is that they can help with more efficient fermentation which means a faster time to the completion of fermentation and also improve the chances of an improved final gravity - that is to say, increase the alcohol content of your batch. 

Yeast energizers have also been demonstrated to also help reduce fusel alcohol and hydrogen sulfide production. 

Fusel alcohols are the alcohols responsible for the 'burning sensation' and can contribute to hangovers. 

H2S will impart a sulfur smell (rotten eggs) and bad taste. 

These two problems may be caused by when the yeast is stressed (such as by having too many sugars in the wort or the temperature is too hot

Yeast energizer also works well in meads and honey brews to help speed fermentation. It will also help cider batches to get to that dry state quicker!

Generally speaking, you'll probably only need to add an energizer if your yeast will face very high sugar worts. 

Does 'yeast energizer' affect beer taste?


There is a bit of debate amongst brewers about the effect an energizer can have on taste. It seems to be fairly negligible if there is one. 

We believe there are more overriding factors in the brewing process (such as the number of hops used and grain profile) that affect the taste, so we wouldn't factor in 'taste effect' as part of your decision making process on whether to add yeast energizer (and you don't really have a choice of your fermentation has stalled!).

What are the ingredients of yeast energizers?


Energizers are usually found to be composed of:

Is an energizer the same as yeast nutrient?


A yeast nutrient is somewhat different from an energizer. Yeast nutrients can be considered to be the "vitamins and minerals" to help yeast grow and ferment. Yeast energizer is like a catalyst to kick start a stuck fermentation back into gear.

How much yeast energizer should I add to my beer wort?


Use approx 1/4 teaspoon per gallon in beer to revive a slow or stuck fermentation.

When to add yeast energizer?


At the beginning of the brew


If you are doing a boil, it can be added in the last 10 minutes of the boil.

If doing a malt kit, pitch it the same time as you do the yeast. 

When you have a 'stuck fermentation'


If you are hugely confident that your fermentation hasn't completed properly (such as by having a vastly incorrect expected final gravity) then you make have a stalled fermentation. 

You can re-ignite your yeast's performance by adding the energizer. 

Before you do that, you should ensure that your drum or carboy is at a sufficient temperature to support fermentation. If you're brewing in a cold shed in winter, it's likely your yeast has gone to sleep rather than you have a stalled fermentation. 

Add one quarter teaspoon or a half teaspoon per gallon to your wort and give it a wee stir. The instructions on the label should give good directions as to the amount to use if unsure. 

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