Arm Megalac Rumen Bypass Fat
By Arm & Hammer Animal and Food Production
Last reviewed: February 2026
Calcium salt of palm fatty acids that bypasses rumen degradation, delivering high energy (2.96 Mcal/lb NEL) to the small intestine.
Industry-standard calcium salt bypass fat from Arm & Hammer with USDA-measured NEL of 2.96 Mcal/lb, used to boost energy density in dairy rations since 1986.
Key Features
- Rumen Bypass Design: Calcium soap matrix protects fatty acids from rumen degradation
- High Energy Density: USDA-measured NEL of 2.96 Mcal/lb, highest verified in the category
- Body Condition Support: Helps maintain body condition during negative energy balance in early lactation
- Proven Track Record: In commercial use since 1986 with extensive research base (50+ trials)
- Rumen Safe: Does not depress fiber digestion or cause rumen acidosis like free oils
Advanced Features
- Certillus: Arm & Hammer targeted microbial solutions for gut health
- Celmanax: Refined functional carbohydrates (RFC) for immune and gut support
- BG-Max: Mycotoxin mitigation and feed hygiene product
Ideal For
Farm Types: Commercial dairies, High-production herds, Transition cow programs
Competitive Advantages
What sets Megalac Rumen Bypass Fat apart from alternatives:
- Highest USDA-measured NEL value (2.96 Mcal/lb) in the bypass fat category
- Nearly 40 years of commercial use and research (50+ published trials)
- Industry-standard product recognized by virtually all dairy nutritionists
- Consistent manufacturing quality from Church & Dwight
Pricing Information
Here is the pricing information for Megalac Rumen Bypass Fat:
Megalac is priced as a premium bypass fat, typically $0.20-0.40 per cow per day at standard feeding rates. Exact pricing depends on fat market conditions and volume. Contact your feed dealer or Arm & Hammer representative.
Pricing Model: Per ton, typically purchased through feed dealers
Pros & Considerations
- Highest verified energy density in the category
- Nearly 40-year track record of safety and efficacy
- Does not disrupt rumen fiber digestion
- Universally recognized by nutritionists
- Premium price vs. commodity fats
- Palm-based product may face sustainability scrutiny
- Effectiveness depends on proper TMR mixing and distribution
Implementation & Setup
How to implement Megalac Rumen Bypass Fat on your dairy operation:
Implementation Timeline: Immediate, added to daily TMR
Training & Support
Training and support options available for Megalac Rumen Bypass Fat:
Support Channels:
Evaluation Questions
Key questions to consider when evaluating Megalac Rumen Bypass Fat:
- What is your herd's average body condition score loss from calving to peak lactation?
- How much supplemental fat is currently in the ration?
- Is the Megalac being fed to the full herd or targeted to fresh and high groups?
- Have you compared the cost per Mcal of Megalac vs. other fat sources in your ration?