FermStart Yeast Rehydration Nutrient

FermStart Yeast Rehydration Nutrient

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If you’re rehydrating beer yeast, it’s quick and easy to ensure a perfect ferment by adding FermStart by CellarScience®.  FermStart is a concentrated micronutrient blend that helps yeast during the critical phase in which they transition from dried and dormant back into healthy and active.  FermStart is added to your rehydration water so that your yeast absorbs the nutrients as they absorb the water.  When gravities exceed 15° Plato or 1.060 starting gravity, it is recommended to rehydrate your yeast.  To ensure a perfect ferment that reaches its full flavor potential, rehydrate your yeast with FermStart.    
How Much?
FermStart is a super concentrated formula, which is very convenient when you are rehydrating large amounts of yeast.  Use 1 gram of Fermstart for every 4 grams of yeast.  We offer some suggested ranges for the amount of water to use below.  
12g yeast - Add 3g FermStart to roughly 50ml of water
500g yeast - Add 125g FermStart to roughly 1500 ml of water
The Science of How it Works
FermStart is rich in readily assimilable amino acids, sterols, vitamins, and natural glutathione.  Readily assimilable means that the size of the molecules present in FermStart are extremely small and easily absorbed by the yeast cell. This is obtained by centrifuge and allows FermStart to be extremely concentrated and not contain filler.
The availability of readily assimilable amino acids allows the yeast cell to skip the step in which amino acids would be synthesized within the cell. This saved energy is instead directed into multiplication. Faster yeast cell multiplication means a faster start allowing your yeast to out-compete wild yeast. Wild yeast have unknown flavors and fermentation behavior so it is important to give the yeast you selected the best chance to dominate the fermentation. 
Sterols help the cell membrane regain and maintain elasticity helping to ensure a perfect start and continued performance throughout the fermentation. The strong cell membrane helps ensure that the yeast can survive and complete alcoholic fermentation under tough conditions.
Glutathione is a very special natural antioxidant and detoxifier made up of three amino acids cysteine, glutamate, and glycine.  It is extremely important for maintaining intracellular health by preventing damage to cellular components during the very oxidative process of rehydration.

Community Q&A

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Why did you choose this?
MoreFlavor Store
SAM C on Jan 4, 2023
I have always has excellent results with this product for mead making.
Norman B on Dec 5, 2022
SAM C on Jan 4, 2023
Want to learn brewing.
Valued C on Dec 17, 2022
I have always has excellent results with this product for mead making.
Norman B on Dec 5, 2022
Because I bought dry yeast
Gary W on Sep 5, 2022
It was recommended.
Matthew S on Sep 3, 2022
in case I need it
Frederick C on Aug 24, 2022
Used it before, does the job
Stevie S on Aug 17, 2022
Linda M on Jul 30, 2022
ran out
Scott Jordan on Jul 23, 2022
To rehydrate - recommended by you
Diane Rudnick on Jul 8, 2022
seems to work
SCOTT M on Jun 8, 2022
watched you tube video
Molly K on Jun 1, 2022
used many times successfully
john g on Apr 19, 2022
start yeast fermentation
Jon T on Apr 13, 2022
Was recommended by the yeast product page
Steven Simpkins on Mar 3, 2022
used this nutrient before with bm 4x4
SCOTT O on Feb 26, 2022
Dry Yeast needs reyhdrating, so getting some nutrition for those little workhorses.
James K on Dec 30, 2021
to aid in rehydrating yeast
jennifer o on Dec 18, 2021
New to me product, let's try it and compare to Go-Ferm that I usually use.
Jon Davison on Nov 25, 2021
It needs a nutrient
Judith H on Oct 26, 2021
Recommended by Champaign yeast packet
Gregory P on Oct 12, 2021
Per manufacture's suggestion
Angelo Di S on Sep 25, 2021
By giving your wine the best ingredients will give it the best results. Quality in, quality out.
Greg Thomsen on Sep 5, 2021
Tony M P on Sep 1, 2021
Valued C on Aug 28, 2021
Phillip M on Aug 7, 2021
Charles L on Jul 28, 2021
Nose was occupied
Don C on Jul 27, 2021
I have used it in the past, and I like the way it works!
Donald B on Jun 15, 2021
to help the yeast rehdrate
Ethan C on May 27, 2021
Makes dry yeast better, reduces lag
Fred S on Apr 16, 2021
Harry Vlavianos on Feb 17, 2021
A hard seltzer recipe called for it
Jason Taclas on Nov 23, 2020
It was recommended.
Chris K on Sep 22, 2020
Brooke M on Sep 10, 2020
It was recommended with the dry wine yeast. I read the PDF
Semone S on Sep 4, 2020
Looking to restart a stalled mead
Daniel F on Aug 25, 2020
recommended by friend
Holly M S on Jun 13, 2020
Hi gravity brew
Kenneth S on May 30, 2020
Helps get yeast in condition before adding to the wort
David R on May 28, 2020
Dry yeast friend
Chris Marshall on May 26, 2020
Mead brewing
Anna K on May 21, 2020
yeast pairing guide
Thomas Geiger on Mar 21, 2020
I have used for 3 years .It provides good quality of red wine.
Yin Min Htun on Dec 19, 2019
trying a new product
Marye H on Nov 11, 2019
good result with getting ferm started
stephen crawford on Oct 10, 2019
I thiught I would try this for my Blueberry wine.
Charles Stahl on Oct 3, 2019
Based on options selection for MT Yeast
PATRICK J H on Sep 24, 2019
you're recommendations
Mike O on Sep 19, 2019
Yeast need this
Adam S on Sep 6, 2019
Want to learn brewing.
Valued C on Dec 17, 2022
Because I bought dry yeast
Gary W on Sep 5, 2022

4.6 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Works great so far. Have noticed positive results.
February 23, 2023
1 year ago
Rated 5 out of 5
Great product!
Smoothest, best fermentation start I have ever had by using Ferm Start.
September 27, 2021
over 2 years ago
Rated 3 out of 5
Jury is still out!
I'm using this in connection with my firdst attempt at the MB Whitewater Seltzer receipe with the Lalvin EC-1118 yeast.The ferment was slow starting so I repitched a second pack of the yeast following directions as before. Finally got going but at a very slow pace. I also used the DAP free nutrient as directed. I'll let it keep going and see what happens. BTW, I'm monitoring with a TILT hydrometer. Started on 10/7 at 1.034. As of 10/21 I'm at 1.021. Ramping Temp slowly from 70F to now 74 F using the inkbird 308 wifi temp controller.
October 22, 2020
over 3 years ago
Rated 5 out of 5
Great start
Needed all help I can get. Must was 72 and mix was 92
August 21, 2020
over 3 years ago
Rated 4 out of 5
seems to do the job
The proof of the pudding (or wine in this case) will be in the final product. will the yeast grow as it should and let the juice go to dryness?
The fermentation is still on going so time will tell but it seems OK.

this is the first time I did not use go-ferm protect.
May 7, 2020
over 4 years ago
Rated 4 out of 5
Good but putsy
I tried this when rehydrating dry lager yeast (S-189). The resulting beers were good. However, I can't help but wonder if it's an unnecessary step (and expense). If you use yeast nutrient and pure oxygen prior to fermentation I don't know if this is worth it.

Seemed to work great for me. Your mileage may vary. It gets clumpy after being opened.
February 21, 2020
over 4 years ago
Rated 5 out of 5
I use this every time to start my yeast during rehydration
Great product. Really got the yeast going. Very easy to use. Best if you get water a little hotter than 104 and let it cool to around 104. Then add the fermstart give it a minute or two then add the yeast. Within 10 minutes it’s ready to add to the must.
January 19, 2020
over 4 years ago
Rated 5 out of 5
Firm Start
I have used this in the past and with the proper amount of potassium metabisulfite and firm aid additions the fermentation will go to dry. This year I picked 367 lbs. of cab and zin from my vines and tomorrow I will crush and destem. I will adjust ph and acid as needed and do a cold soak for 4 days with warming and yeast addition to start fermentation.
October 1, 2019
over 4 years ago
Rated 5 out of 5
FermStart yeast nutriaent
We were extremely pleased. Fermentation was working within 12 hours.We plan on using the nutrient with all of our future rehydrations.
July 10, 2019
over 4 years ago