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Reduless is a new product from Lallemand that was designed to correct negative VSCs (Voltatile Sulfur Compounds) such as H2S (hydrogen sulfide, A.K.A. "rotten egg") and DMS (dimethyl sulfide, A.K.A. "cooked corn") defects in wine. Made from inactivated yeast that have been infused with copper using a proprietary process, Reduless is a much gentler H2S remedy on the wine than the traditional copper sulfate (CuSO4) treatment alone. If you have an H2S problem, then we recommend treating it with Reduless first. However, if the sulfur problem still remains after the Reduless treatment, then a bench trial with copper sulfate (CuSO4) is recommended.

Note: The sooner you catch a sulfur problem the easier it is to deal with!

To Use:
Dissolve Reduless in 10 times it's weight in water and add immediately to the wine. Stir the wine gently to ensure a thorough homogenization. Rack or filter after 72 hours.

Recommended Dosage:
0.4-0.6 g/gal. The maximum amount of copper that can be released into the wine using Reduless at the recommended dosage is 0.02 ppm.

Community Q&A

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Why did you choose this?
MoreFlavor Store
To remove H2S from a wine immediately post fermentation.
Timothy D on Oct 10, 2019
heard good things
Jacques van der V on Aug 28, 2019
To remove H2S from a wine immediately post fermentation.
Timothy D on Oct 10, 2019
To remove sulfur from a batch of apple cider
Dean m on Aug 30, 2019
heard good things
Jacques van der V on Aug 28, 2019
Does a good job
Mike Sullivan on May 13, 2019
Product recommended by friend
Joseph s on Apr 1, 2019
Tom Repas said it helps fix SO2 problems.
Brian K on Mar 29, 2019
Nice easy way to control hydrogen sulfide
Greg Stricker on Dec 8, 2018
This looks like a good first step.
William Scanlin I on Dec 5, 2018
solve a sulfur odor in my wine
Chris K on Nov 17, 2018
Jonathan B on Nov 17, 2018
I believe I’m in the beginning stages of H2S and thought I’d give this a try before taking the dreadful step of using copper sulphate in my wine. Hopefully this Reduless does the trick
matthew b on Oct 17, 2018
Copper sulfate is too harsh for just a touch of H2S
Frank S on Sep 26, 2018
Good stuff
Victor Y on Aug 4, 2018
Got your magazine and having a smell problem very helpful
gerard teto on Jun 27, 2018
Sulfur odor in Malbec
Mark G on Jun 7, 2018
Correcting a sulfur problem in aging wine.
Kirk Taylor on May 11, 2018
Off nose on wine.
Michael M on May 8, 2018
To get rid of the sulfur smell of our red wines! Was recommended!
Emily B on Apr 20, 2018
Reduce sulfur
Richard Robinson on Mar 31, 2018
need to fix some stanky wine
Michael Gostomski on Mar 16, 2018
Good for dealing with minor H2S problems after fermentation
Doug H on Mar 9, 2018
Used it before
John B on Feb 17, 2018
For the event I have a red wine that is reductive
Kirk E R on Feb 13, 2018
Wine got jacked up
Cory w on Feb 8, 2018
To remove sulfur from a batch of apple cider
Dean m on Aug 30, 2019
Does a good job
Mike Sullivan on May 13, 2019
Interested in using this product in beer. I have had two fruited kettle sours in the past that developed H2S and this looks like something that could help. I am also intrigued that the description says the product will go after DMS. Are there issues using this product in beer? Thank you.
Mary McCloud on Aug 5, 2019
BEST ANSWER: Hi Mary - as long as the product is used within the recommended dosage rates, there should be no issues using it in beer.

4.8 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Brought back the fruit flavors masked by H2S in an insipid wine. Just follow the procedure and rack after the specified time.
September 30, 2019
3 months ago
it worked for some of my wine with Hs2, but not all of it. The packet said 31 grams but as I was weighing it out it did not add up to 31 (so, I fell short of the amount I needed). Get more than you need I guess
December 3, 2018
11 months ago
Response from MoreFlavor
Hey so sorry about your experience. We try very hard to create the best experience for our customers and provide quality products. Please give us a call at 1-800-600-0033 or email us at info@moreflavor.com so that we can assist you. We are here to help. Cheers!
December 4, 2018
Zach R Staff
Saved the wine
Made the mistake of leaving our wine on the gross lees for a little too long. Splash racking didn't really work so i did some research on the next corrective step. I really didn't want to mess around with copper so I went with a recommendation on Reduless. I treated the wine with the recommended doses twice and it cleared our H2S issue. Highly recommended!
November 1, 2018
1 year ago
Reduless works
This is a great product for the home winemaker. It does effectively remove sulfur based odors from your wine. Using as directed I was able to clean up a few whites that had developed a detectable sulfide odor.
June 9, 2018
1 year ago
I had a funky fermentation and after fermentation finished I ordered redulees. I did a bench trial as suggested and the minimum dose was effective. After several days my white wine was back to fresh and fruity. Im glad a ordered a free extra packages in case this happens in the future.
February 26, 2018
1 year ago
It works great
I had a major wine fault with my red wine: I had the "burned tire" smell. This cured it, far easier than the copper solution!
February 25, 2018
Reduless deserves the Nobel Prize for Wine Saving
If you make wine, buy some Reduless and keep it nearby. When something goes wrong, or does not smell right, or totally smells nasty or just has no smell, then treat with Reduless. This little miracle has turned good looking, good tasting but nearly scentless syrahs into utter gems for me. So far it has not made any of my hair grow back, but I will not bet against it.

Every time I judge a wine and find it lacking in nose and aroma, I suggest a treatment with reduless. Sulfur often is below detection threshold, but is present enough to muffle all the lush fruit and flower scents in a wine. Reduless gets rid of the sulfur and frees the smells. For me that is by itself enough to move a silver to gold.

It cannot hurt. It likely will help. And who knows, next year maybe they will offer a Nobel Prize for Saving Wines. If so, I nominate Reduless.
February 2, 2018
1 year ago
Great product!
It cleared up a stinky zinfandel no problem. I would use it again
January 30, 2018
1 year ago
Reduless works very well. Because I didn't read the directions correctly, I added twice the amount called for. Everything worked out well and customer service was very helpful with that situation.
January 30, 2018
1 year ago
Reduless faces difficult situation
Recently I had two exceedingly stinky wines, a syrah and a primitivo from grapes I had grown. Both wines fermented well and went into carboys smelling fine. I added mlf culture and it ran to completion with no problem. But then a truely foul odor emerged from both carboys.

Rather than just throw the offending wine away I decided to see if Reduless could help. After two doses of Reduless both wines were improved but not fully cured. The US limit for copper residue in wine is .5ppm,. With Reduless producing a residual of .02ppm from a maximum dose, I was not worried about two doses with a net of .04ppm. At 4 doses the primitivo was free of all off odors and gave a nice fruity smell. The syrah took 5 doses to loose the stink and a sixth "low dose" of .4gm per gallon will finish off my little experiment. I only gave one "mzximum dose" of .6gm per gallon, all the others were .4 gm per gallon.

My estimate is about .1ppm of copper residue compared to a maximum allowed of .5 pmm. So I feel confident in the wine.

Conclusion: Reduless is the real deal, it works and it is safe.
November 12, 2015
Response from MoreFlavor
Are there instructions included, for how to measure out the correct amount?
December 22, 2017