Why canola meal is a two-for-one fit for dairy diets

A closer look at how canola meal delivers both high-quality protein and usable energy.

As dairy nutritionists navigate increasingly narrow profit margins and heightened expectations regarding animal performance, ingredient selection must go beyond crude protein values.

Protein ingredients are required to deliver metabolizable amino acids plus available energy, and contribute to both feed and economic efficiency, improving not just performance measures but also improved income over feed cost (IOFC). Research and industry experience indicate that canola meal is uniquely positioned to deliver on both fronts.

“Nutritionists today are not simply formulating for protein — they’re evaluating ingredients for their contribution to amino acids and energy needs,” says Essi Evans, Ph.D., E+E Technical Advisory Services. “Canola meal offers a balanced amino acid profile along with a meaningful energy contribution. That combination allows us to optimize both sides of the ration equation.”

Canola meal at first glance

Canola meal is widely regarded as a valuable ingredient in dairy rations, backed by an extensive body of research.

In fact, since 2011, five meta-analyses have evaluated canola meal in lactating dairy diets, each combining past results from different angles. Across varying approaches, researchers consistently observed increased milk production — ranging from 1.54 to 5.29 pounds per cow per day — along with reductions in milk urea nitrogen (MUN) of 1 to 1.5 mg/dL.

“When diets formulated to the same specifications consistently exceed expectations, it tells you something important,” explains Dr. Evans. “Canola meal is often undervalued in many formulation models. The biological response we measure in cows is greater than the assigned nutrient values predict.”

That discrepancy has led researchers to explore what Dr. Evans calls “hidden attributes” — nutritional advantages not fully captured in traditional ration formulation systems.

Hidden protein advantages

On the protein side, canola meal contains a high proportion of rumen undegradable protein (RUP) that is not accurately reflected by older assays such as the nylon bag technique. Modern research has demonstrated that some soluble proteins degrade more slowly than previously assumed, allowing a greater portion to escape the rumen and contribute directly to the metabolizable protein supply.

“Canola meal’s storage proteins behave differently than proteins in many other vegetable sources,” says Dr. Evans. “Although soluble, a significant portion escapes rumen degradation, which supports higher milk output without increasing nitrogen waste.”

Equally important is canola meal’s amino acid balance. Its profile closely resembles microbial protein and the amino acid composition of milk and body tissue. While many ration programs focus primarily on lysine and methionine, canola meal provides a broader spectrum of essential amino acids — including higher levels of methionine and cysteine — that help reduce inefficiencies in protein synthesis.

“If the absorbed amino acid profile closely matches the cow’s requirement, there’s less energy spent converting excesses or compensating for deficiencies,” explains Dr. Evans. “That efficiency shows up as lower MUN and improved nitrogen utilization.”

Energy: more than a calculated value

Protein is only part of the two-for-one equation. Energy is the other half. Historically, the assigned energy value of canola meal has been conservative. However, recent work measuring net portal nutrient absorption has shown that its energy supply is comparable to that of soybean meal.

“There’s growing evidence that the calculated energy values don’t fully represent what the cow actually receives,” says Dr. Evans. “When we measure energy at the tissue level, canola meal performs right alongside other major protein sources.”

Dr. Evans states, “Increasing evidence indicates that the calculated energy value may not accurately reflect the energy actually utilized by the cow. When assessed at the tissue level, canola meal demonstrates comparable performance to soybean meal.”

Additional research has identified greater than predicted fiber digestibility and reductions in methane production when canola meal is included in the diet. These are unaccounted for factors that contribute to the usable energy supply while supporting sustainability goals.

Early lactation studies offer particularly compelling data. Recent early lactation studies show that replacing soybean meal with canola meal yields 4.4 to 8.8 pounds more milk per cow per day without compromising body condition or reproduction.

“That tells us we’re not just pushing cows harder,” notes Dr. Evans. “We’re supporting them more efficiently.”

Efficiency that shows up in IOFC

For nutritionists working under feed cost pressure, the implications are clear. By delivering balanced amino acids and metabolizable energy, canola meal allows for precise nutrient supply without unnecessary excess. That precision supports higher milk yield, reduces nitrogen losses, and ultimately strengthens IOFC.

“As we refine formulation models, we’re beginning to appreciate ingredients that provide both protein quality and energy value,” says Dr. Evans. “Canola meal truly is a two-for-one fit for dairy diets.”

In a market demanding precision and performance, ingredients that deliver on both fronts stand out. To explore the research and learn more about how canola meal can support dairy performance, visit canolamazing.com.

Canola meal is a coproduct of canola processing and is approximately 42% crude protein on a dry matter basis, with a high bypass protein value and amino acid profile well-suited for milk production. Because of its high protein content, canola meal is often used as a protein supplement for animal feeds, including dairy rations. Visit canolamazing.com to learn more.