Why Winter Hits Some Families Harder — And What Most People Never Get Told

Every winter, some families seem to catch everything going around.

Every cold, every bug, every school virus. Weeks of runny noses, missed work, broken sleep. The same pattern, year after year.

If that's your family — it's not bad luck. And it's probably not a vitamin C deficiency either.

Why do some people get sick more than others?

The honest answer is that immune resilience isn't one thing. It's a collection of foundations — and when those foundations are compromised, the immune system simply can't do its job properly.

Most people know the basics. Sleep. Stress. Nutrition. And yes, certain nutrients matter enormously for immune function.

But here's what most people don't get told.

Why simply taking zinc doesn't always work

Zinc is genuinely important for immune function. It supports the production and activity of immune cells, and short-term supplementation at the first sign of illness has real clinical evidence behind it.

But zinc doesn't work in isolation.

Zinc and copper exist in a careful balance in the body. When copper is elevated — which is more common than most people realise, particularly in women — simply adding more zinc can actually make the imbalance worse rather than better.

This is why a supplement that works well for one person does nothing for another. The supplement isn't wrong. The picture is incomplete.

This is exactly the kind of pattern that hair tissue mineral analysis can reveal.

Rather than guessing which nutrients to add, HTMA shows the mineral relationships that are actually driving the problem — so support can be targeted rather than generic.

I've written more about how HTMA works here: Finding a Starting Point: How Mineral Patterns Can Bring Clarity in Midlife.

The blood sugar and immunity connection

This one surprises people.

Blood sugar instability suppresses immune function — directly and measurably. When glucose spikes and drops repeatedly throughout the day, it creates an inflammatory environment that makes it harder for immune cells to respond effectively.

This isn't about diabetes. It's about the chronic, low-grade blood sugar fluctuation that affects a huge number of people — and rarely gets discussed in the context of immune health.

If your family eats a lot of refined carbohydrates and processed food — particularly through the school lunch box — this is worth paying attention to.

What about vitamin D?

Yes — vitamin D is genuinely foundational for immune function, and New Zealand winters are more depleting than most people realise.

Between May and August, sun exposure in the South Island is rarely sufficient to maintain adequate vitamin D levels. A quality supplement, dosed appropriately for age and weight, is one of the most impactful things most New Zealand families can do before winter hits.

But again — vitamin D works in concert with other minerals, particularly magnesium. Without adequate magnesium, the body cannot properly activate vitamin D. Another reason why isolated supplementation often underdelivers.

What does proper immune support actually look like?

When I work with a family or individual with persistently poor immune resilience, I'm not reaching for a generic immune formula.

I'm looking at mineral balance — including the relationships between zinc, copper, magnesium and vitamin D. I'm considering blood sugar patterns and diet quality. I'm assessing stress load, because chronic stress is profoundly immunosuppressive.

Where needed, I prescribe targeted herbal and homeopathic formulas — going well beyond what's available off a health shop shelf — chosen specifically for the pattern I'm seeing, not just the season.

In my own home, I keep practitioner-grade immune support on hand year-round. The moment someone says "I feel something coming on," we act immediately. Early, well-chosen intervention makes an enormous difference to how quickly the body responds.

Winter doesn't have to mean three months of illness

If your family struggles every winter and you'd like a personalised approach rather than another round of guesswork, I'd love to help.

I offer in-person consultations in Rolleston and online consultations throughout New Zealand.

👉 Book at foxyforlife.co.nz