By Samantha Knupp, MSc | Published 8 February 2026
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Introduction
The human body is a complex system that relies on a steady supply of resources to maintain its daily operations. While we often focus on macronutrients like protein or well-known vitamins like D and C, there are smaller components that are equally necessary for the machinery of our biology to function correctly. Zinc is one of these essential trace minerals. It does not need to be the star of the show to be vital; it simply needs to be present in sufficient quantities to keep systems running smoothly.
For women over 55, maintaining adequate zinc levels becomes a matter of supporting the body as it navigates the natural physiological shifts of aging. It is about ensuring your body has the raw materials it requires to repair tissues, support immune cells, and maintain skeletal integrity.
The Role of Zinc in the Body
Zinc is technically defined as an "essential" trace element because the body cannot produce it on its own. It must be obtained regularly through diet or supplementation. Its primary role is that of a cofactor, which means it acts as a helper molecule for over 300 different enzymes [4].
These enzymes are responsible for a vast array of biological processes. Zinc is required for DNA synthesis, cell division, and protein production. It essentially acts as a key that turns the engine for these cellular activities. Without sufficient zinc, these fundamental processes can become inefficient. It is involved in everything from how we metabolize food to how our senses of taste and smell function.
Zinc Sufficiency and Healthy Aging
As we age, the body’s relationship with nutrients changes. Research suggests that older adults are more susceptible to lower zinc levels. This is often due to a decrease in absorption efficiency in the digestive tract or dietary changes [2]. For women over 55, ensuring sufficiency is critical for supporting several key pillars of health.
Supporting Immune Function
One of the most well-documented roles of zinc is its contribution to a healthy immune system. It is critical for the normal development and function of immune cells, particularly T-lymphocytes and neutrophils. These cells are responsible for identifying and neutralizing foreign substances in the body.
As we get older, the immune system can naturally become less responsive, a process associated with normal aging. Adequate zinc intake helps maintain the activity of these immune cells, supporting the body’s natural defense mechanisms and its ability to respond to seasonal challenges [2].
Maintaining Bone Integrity
While calcium is often the primary mineral associated with bone health, zinc plays a supportive structural role. Post-menopausal changes often involve a shift in bone density. Zinc is found in the bone matrix and is necessary for the activity of osteoblasts, the cells responsible for bone formation [6].
It also helps regulate the activity of osteoclasts, which are cells that break down bone tissue. By supporting the balance between bone formation and bone resorption, zinc contributes to the maintenance of normal bone structure and strength [6].
Cognitive Health and Mood
Zinc is highly concentrated in the brain, particularly in the hippocampus, which is the area associated with memory and learning. It plays a role in synaptic transmission, which is how brain cells communicate with one another.
Ensuring sufficient zinc levels supports cognitive function and mental clarity. Additionally, zinc is involved in the regulation of neurotransmitters that influence mood. Studies have observed that maintaining adequate zinc levels is associated with a stable mood and emotional well-being [5].
Skin Health and Repair
The skin holds a significant portion of the body's zinc reserves. It is essential for the synthesis of collagen, the protein that gives skin its structure and elasticity. Zinc also supports the skin’s natural repair processes. Whether it is a minor scratch or general tissue maintenance, zinc is required for the enzymes that facilitate healing and the maintenance of healthy skin barriers [3].
Why Form Matters: The Zinc Bisglycinate Difference
When choosing a source of zinc, absorption and tolerability are the two most important factors. Standard forms of zinc, such as zinc sulfate or zinc oxide, can sometimes be difficult for the body to absorb efficiently. They are also known to cause digestive discomfort in some individuals.
Zinc bisglycinate offers a different approach. In this form, the zinc molecule is bound, or chelated, to two molecules of the amino acid glycine. This structure helps protect the zinc as it passes through the stomach, allowing it to be absorbed intact in the small intestine.
A study comparing zinc formulations found that zinc bisglycinate demonstrated significantly higher bioavailability compared to other common forms like zinc gluconate [1]. The presence of glycine also makes this form much gentler on the stomach, reducing the likelihood of digestive irritation. For women looking to optimize their intake without disruption to their digestion, this chelated form is often the superior choice.
Practical Advice for Supplementation
Integrating zinc into your routine should be simple and consistent.
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Dosage: A common daily recommendation for supplementation is between 15mg and 30mg. This amount is generally sufficient to fill dietary gaps without exceeding safety limits [4].
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The Copper Connection: Zinc and copper compete for absorption in the body. Long-term supplementation with high doses of zinc can potentially lower copper levels. If you are taking zinc daily for an extended period, it is often wise to ensure your diet includes copper-rich foods like nuts and seeds, or to choose a supplement that includes a small amount of copper.
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Timing: While zinc bisglycinate is gentle, taking it with food is standard practice to further ensure optimal absorption and comfort.
Conclusion
Zinc is a fundamental component of human biology. It supports the immune system, helps maintain bone structure, and contributes to cognitive health and skin integrity. As we age, ensuring we are getting enough of this mineral becomes a practical strategy for maintaining overall wellness. By utilizing a highly absorbable form like zinc bisglycinate, you can ensure your body has the essential tools it needs to function at its best.
