---
product_id: 66916132
title: "CellarScience - AD332B Fermaid O (120 g), 4.2 Ounce (Pack of 1)"
brand: "cellarscience"
price: "S/.139"
currency: PEN
in_stock: true
reviews_count: 10
category: "Cellar Science"
url: https://www.desertcart.pe/products/66916132-cellarscience-ad332b-fermaid-o-120-g-4-2-ounce-pack
store_origin: PE
region: Peru
---

# Enhances yeast health Reduces heat spikes Organic nitrogen boost CellarScience - AD332B Fermaid O (120 g), 4.2 Ounce (Pack of 1)

**Brand:** cellarscience
**Price:** S/.139
**Availability:** ✅ In Stock

## Summary

> 🍇 Keep your yeast happy, your brew legendary.

## Quick Answers

- **What is this?** CellarScience - AD332B Fermaid O (120 g), 4.2 Ounce (Pack of 1) by cellarscience
- **How much does it cost?** S/.139 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/66916132-cellarscience-ad332b-fermaid-o-120-g-4-2-ounce-pack)

## 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

- • **Trusted by Pros:** Preferred choice for serious brewers aiming for perfection.
- • **Easy Integration:** Simple 1.5g per gallon dosing fits seamlessly into your process.
- • **Flavor-Forward Brewing:** Elevate your meads and brews with richer, cleaner flavors.
- • **Pure Organic Nutrition:** Harness the power of natural nitrogen for flawless fermentation.
- • **Consistent Fermentation:** Minimize heat spikes and avoid stalled batches every time.

## Overview

CellarScience AD332B Fermaid O is a premium organic yeast nutrient designed to optimize fermentation by providing essential nitrogen and nutrients. It reduces heat spikes, supports yeast vitality, and enhances flavor profiles, making it a must-have for mead and craft brewers seeking consistent, high-quality results.

## 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: Fermaid O is HUGE for Meadmaking - 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.
Review: Fermaid O great for fermentation - Since starting to use a couple grams in each fermentation has been more consistent and less worry about stalling. Every batch gets this now.

## 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 | #204,349 in Grocery & Gourmet Food ( See Top 100 in Grocery & Gourmet Food ) #531 in Beer Brewing Ingredients |
| Customer Reviews | 4.7 4.7 out of 5 stars (341) |
| Date First Available | July 29, 2017 |
| Item Weight | 4 ounces |
| Item model number | AD332B |
| Manufacturer | CellarScience |
| Package Dimensions | 7.8 x 5.87 x 1.69 inches |

## Product Details

- **Brand:** CellarScience
- **Item Form:** Powder
- **Item Weight:** 0.25 Pounds
- **Number of Items:** 1
- **Unit Count:** 4.2 Ounce

## Images

![CellarScience - AD332B Fermaid O (120 g), 4.2 Ounce (Pack of 1) - 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

### ⭐⭐⭐⭐⭐ Fermaid O is HUGE for Meadmaking
*by C***E on December 27, 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.

### ⭐⭐⭐⭐⭐ Fermaid O great for fermentation
*by C***D on December 28, 2023*

Since starting to use a couple grams in each fermentation has been more consistent and less worry about stalling. Every batch gets this now.

### ⭐⭐⭐⭐⭐ Great
*by C***A on December 9, 2025*

Kept my yeast happy

## Frequently Bought Together

- CellarScience - AD332B Fermaid O (120 g), 4.2 Ounce (Pack of 1)
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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-01-25*