Canola meal delivers dual benefits for dairy diets, boosting both metabolizable protein and energy efficiency, according to Dr. Essi Evans of E+E Technical Advisory Services. She highlights its unique amino acid profile as a key driver of improved milk production.
Essi Evans, Ph.D., E+E Technical Advisory Services
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 expected to deliver metabolizable amino acids plus available energy, contributing to both feed and economic efficiency — including income over feed cost (IOFC). Some research and industry observations suggest that canola meal may offer advantages 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.”
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.”
