Immunity starts with mineral intelligence

Immunity is defined as the state or quality of being resistant to a particular infectious disease or pathogen. It is not a single process, but a coordinated network of organs, white blood cells, proteins and biochemical messengers working together to keep the animal healthy, resilient and performing well.

In South Africa’s demanding production landscape, this immune strength is no longer a “nice to have” but a survival necessity. Heat stress, fluctuating forage quality, seasonal nutritional gaps and increased pathogen pressure place constant strain on the immune system, and animals often begin losing resilience long before clinical signs appear, which makes proactive immune support one of the most effective ways to protect health and performance on-farm.

Immunity functions through three interconnected lines of defense:

• The physical and microbial barrier, which involves the skin, gut lining, mucus layer and microbiota. The aim is to block pathogens from entering the body.

• The innate immune response, a fast-acting system that uses inflammation, antimicrobial compounds and phagocytic cells to neutralise threats.

• The acquired immune system, which provides targeted, long-term protection through antibodies and immune memory.

How well these systems function depends heavily on nutritional inputs, especially key trace minerals that activate specific immune pathways.

Producers cannot control every stressor an animal faces, but they can strengthen these internal systems. This is where understanding the role of minerals becomes especially valuable.

Minerals and their targeted roles in immunity

Zinc: The gatekeeper mineral

Zinc is fundamental to maintaining the body’s first line of defense. Zinc supports immunity by driving the replication and function of immune cells, maintaining epithelial defence, supporting tissue repair and wound healing and reducing inflammation during challenges. Deficiencies of zinc in the diet are often related to a weak gut barrier, poor vaccine response and higher risk infection. Signs may include decreased feed intake, impaired reproduction, reduced egg hatchability, retarded growth, and abnormal growth of wool, hair or feathers.

Copper: The immunity igniter

Copper directly fuels the activity of neutrophils and macrophages, the immune cells responsible for engulfing and destroying pathogens. It also supports connective tissue strength and antioxidant enzyme function, helping animals cope with stress and recover more efficiently. Low copper often shows up as anemia, poor coat condition, fertility challenges and increased infection pressure, signs that South African producers may recognize during high-stress periods.

Manganese: The backbone of cellular protection

Manganese contributes primarily to antioxidant defense and cellular protection. Manganese functions in reducing oxidative stress during infection or heat load, supporting cartilage and bone integrity and stabilizing metabolic energy. Low manganese compromises antioxidant capacity and increases inflammation. Manganese deficiency has severe impacts on animals, including impaired growth, abnormal reproduction function, and ataxia (lack of muscle coordination) in newborns. Poultry-specific issues include thin eggshell quality, perosis (tendon slippage), reduced egg production and reduced hatchability.

Iron: The oxygen engine

Iron drives the oxygen transport and cellular energy processes that immune cells rely on. Strong immune responses require energy, and iron ensures that those cells can perform, multiply and produce antibodies effectively. Low iron reduces stamina, weakens immunity and slows recovery. This is seen particularly in young, growing or stressed animals.

Why mineral form matters: The Alltech difference

Trace minerals only support immunity if they are absorbed, retained and utilized well by the animal. This makes mineral form just as important as mineral inclusion level.

Inorganic minerals, such as sulfates and oxides, dissociate rapidly in the digestive tract. Once released as free ions, they are highly reactive and easily bind to antagonists like phytates and other minerals, which hampers absorption. The free ions also increase oxidative stress in the gut and interfere with enzymes, vitamins, antioxidants and other minerals — all vital components that contribute to immune function. When these components are either not available or not able to do their jobs, the immune system is vulnerable.

Proteinate trace minerals

Alltech trace minerals are proteinates, where the mineral is chelated to carefully selected amino acids and short-chain peptides derived from partially hydrolyzed proteins. This creates a biologically stable structure that protects the mineral as it moves through the digestive tract.

Strong chelation and stability across changing pH conditions allow proteinate minerals to:

• Remain bound in the acidic stomach environment

• Avoid binding to antagonists in the gut

• Reach the small intestine intact for absorption

• Deliver more mineral to immune-active tissues

Research clearly links chelation strength and stability with improved mineral bioavailability. Proteinated zinc, copper, manganese and iron consistently show higher bioavailability than inorganic sources and many weaker organic forms, supporting more effective immune cell function and antioxidant activity.

Supporting immunity without disrupting the ration

Immune performance depends on more than minerals alone. Weakly bound minerals can negatively affect the entire diet by:

• Inhibiting enzymes such as phytase

• Reducing vitamin stability (including vitamins E and D3)

• Increasing oxidative reactions in the premix and the animal

Proteinated minerals are significantly less reactive, helping to:

• Preserve enzyme activity

• Protect vitamins and antioxidants

• Reduce unnecessary oxidative stress during immune challenges

What this means on-farm

By choosing stable, proteinate trace minerals, producers support immunity at multiple levels:

• Stronger gut integrity and first-line defense

• Faster, more efficient innate immune response

• Improved antibody production and immune memory

• Greater resilience during heat stress, disease pressure and production challenges

This approach is not about feeding more mineral, but about feeding a mineral form the animal can actually use.

The takeaway

Immunity is built daily through consistent nutritional support. While vaccination and biosecurity remain essential, they cannot compensate for poor mineral utilization. Especially in today’s high-stress production environment, mineral intelligence — not mineral quantity — is the key to optimal immunity. Alltech’s proteinate trace minerals are designed to deliver minerals efficiently, protect the rest of the ration and support immune resilience when animals need it most.