---
product_id: 80051154
title: "AD332B Fermaid O (120 g)"
brand: "cellarscience"
price: "€ 88.82"
currency: EUR
in_stock: true
reviews_count: 6
category: "Cellar Science"
url: https://www.desertcart.pt/products/80051154-ad332b-fermaid-o-120-g
store_origin: PT
region: Portugal
---

# 100% organic nitrogen source reduces heat spikes during fermentation precise dosing at 1.5g/gal AD332B Fermaid O (120 g)

**Brand:** cellarscience
**Price:** € 88.82
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your brew with nature’s finest nutrient—because your yeast deserves the best!

## Quick Answers

- **What is this?** AD332B Fermaid O (120 g) by cellarscience
- **How much does it cost?** € 88.82 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/80051154-ad332b-fermaid-o-120-g)

## Best For

- cellarscience enthusiasts

## Why This Product

- Trusted cellarscience brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Flavor Forward:** Say goodbye to sulphite off-notes—embrace pure, natural taste clarity.
- • **Cool & Controlled:** Minimize heat spikes to protect yeast vitality and enhance aroma profiles.
- • **Precision Perfect:** Easy, exact dosing ensures consistent, professional-grade fermentation every batch.
- • **Pure Organic Power:** Harness natural nitrogen for cleaner, richer fermentation flavors.
- • **Moisture Sensitive, Handle Smart:** Store with silica gel to keep your nutrient fresh and ready to perform.

## Overview

AD332B Fermaid O is a premium organic yeast nutrient designed to optimize fermentation by providing natural nitrogen and essential nutrients. It reduces heat spikes, promoting healthier yeast activity and cleaner flavor profiles. Ideal for precise dosing at 1.5 grams per gallon, this product replaces synthetic alternatives like DAP and Fermaid K, ensuring a more natural fermentation process with less off-flavors. Packaged in a moisture-sensitive 120g container, it requires careful storage to maintain peak performance.

## Description

Contains organic sources of nitrogen, not damp, along with nutrients for a healthy fermentation with less heat spikes. Better yeast health equals better flavors. Use 1.5G per gallon. Rehydrate in distilled water and add at 1/3 sugar depletion.

Review: DAP out the window - So, I'm a big fan of doing things as naturally as possible and jumped at the chance to buy a yeast nutrient that comes from an organic source. I've used this several times previously to buying this and there is at least a very small difference in flavour in some (not all) of my side by side brew tests that I've used this in. When I use Fermaid O, there is an apparent lack of sulphite smell/flavour compared to using DAP or Fermaid K even in primary fermentation. That, and the fact that I know it's a natural product will be enough to keep me buying it (though I hope to find a decent UK source in future). This replaces DAP, Fermaid K etc. TIP: get this out of the packet and into a jar with a silica gel pack in it as Fermaid O has an insane affinity for moisture and becomes very sticky, very quickly!
Review: Works as it should

## Features

- Package Dimensions: 5.69 L x 0.81 H x 5.44 W (inches)
- Package Weight : 0.25 pounds
- Country of Origin : United States
- Part number: AD332B

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B074D9HQJD |
| Best Sellers Rank | 2,587,740 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 653 in Fermenters |
| Item model number | AD332B |
| Manufacturer | CellarScience |
| Package Dimensions | 19.8 x 14.9 x 4.3 cm; 113.4 g |

## Product Details

- **Brand:** CellarScience
- **Item form:** Powder
- **Item package quantity:** 1
- **Item weight:** 113 g
- **Manufacturer:** CellarScience
- **Number of items:** 1
- **Package weight:** 0.13 Kilograms
- **Speciality:** Certified Organic
- **Unit count:** 119.068 gram
- **Variety:** Yeast

## Images

![AD332B Fermaid O (120 g) - Image 1](https://m.media-amazon.com/images/I/514eBYMLRhL.jpg)

## Questions & Answers

**Q: Is there an expiration date?  Is it good for more than 2018?  And does it require refrigeration, or just cool dark?  Thx**
A: Generally, we would recommend using the product within 12 months after opening. Refrigeration would be best, but is not required for storage.

**Q: What is the difference between A & B?**
A: AD332A has 12 grams of product while AD332B has 120 grams.

**Q: Do you add an additional 1.5 grams at 1/3 depletion? Or are you splitting the 1.5 grams? Also do you add it immediately?**
A: There are two schools of thought on this:
1. add at 24 hrs/48 hrs/72 hrs.  Less specific than:
2. add at yeast pitch/25% depletion/33.3% depletion.
YMMV

**Q: Fermaid o is manufactured by lallemand, but this listing shows the manufacturer as "cellularscience". who is cellularscience? is this genuine?**
A: I believe that Lallemand's smallest package size is 2.5kg. Cellularscience repackages the several products into smaller retail size packages.

## Customer Reviews

### ⭐⭐⭐⭐⭐ DAP out the window
*by C***R on 23 January 2021*

So, I'm a big fan of doing things as naturally as possible and jumped at the chance to buy a yeast nutrient that comes from an organic source. I've used this several times previously to buying this and there is at least a very small difference in flavour in some (not all) of my side by side brew tests that I've used this in. When I use Fermaid O, there is an apparent lack of sulphite smell/flavour compared to using DAP or Fermaid K even in primary fermentation. That, and the fact that I know it's a natural product will be enough to keep me buying it (though I hope to find a decent UK source in future). This replaces DAP, Fermaid K etc. TIP: get this out of the packet and into a jar with a silica gel pack in it as Fermaid O has an insane affinity for moisture and becomes very sticky, very quickly!

### ⭐⭐⭐⭐⭐ Review
*by D***N on 10 October 2025*

Works as it should

### ⭐⭐⭐⭐⭐ Review
*by C***E on 27 December 2025*

Fermaid O is supremely helpful if you brew stuff that isn't nutrient rich for yeast; I brew meads without much else in the recipe so the rather hostile atmosphere can cause a more stressed out yeast. Fermaid O improves the quality of my brew, and the value of that for the money is enough that I won't go without it. Pros: -The standard for organic yeast nutrition -Preferred over inorganic yeast nutrition -I feel it improves the taste and smell of what I ferment Cons: -People get riled up over using it or not Happy yeast make happy ferments; I keep my yeast happy by using Fermaid O.

## Frequently Bought Together

- CellarScience - AD332B Fermaid O (120 g), 4.2 Ounce (Pack of 1)
- Fermtech - Auto Siphon Mini with 6 Ft of Food Safe Tubing & Clamp - Easy Home Brewing, Winemaking Kit, Complete System for Beer, Wine, Liquid Transfer & Fermentation Tools - Perfect for Small Batches
- Five Star - 6022b_ - Star San - 32 Ounce - High Foaming Sanitizer

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-03-16*