A Look at a 5,982-Patient Study on Vitamin C, D3, Zinc & Quercetin

When it comes to supporting your immune system, you’ve probably heard plenty about vitamin C, vitamin D and zinc. But quercetin — a naturally occurring plant flavonoid — is the rising star in the world of nutritional science. And when the four are combined, the synergy is capturing the attention of researchers worldwide.

Recently, a large-scale Ukrainian study involving 5,982 adults explored exactly this combination: Vitamin C + Vitamin D₃ + Zinc + Quercetin. And the findings are intriguing for anyone who cares about immune resilience.

At Not the Norm, this research directly resonates with what inspired us to create CDQZ Immune Support: a clean, thoughtful formulation built on the strengths of these very nutrients.

Let’s break down what the researchers discovered - and why it matters for you.

What the Study Looked At

The study followed nearly six thousand adults receiving a daily combination of:

• Vitamin C (400 mg)

• Vitamin D₃ (1000 IU)

• Zinc (10 mg elemental)

• Quercetin (250 mg)

These are the very nutrients we specifically chose for CDQZ Immune Support, although our formulation uses a slightly stronger formula of high-purity, carefully sourced ingredients - and we’ll get to that later.

Participants took the nutrients for 5 to 30 days. The researchers monitored two things:

1. How people felt

2. Whether complications developed during common viral respiratory illnesses

This wasn’t a pharmaceutical trial - no drugs, no experimental compounds. Just everyday nutrients people already know and trust.

What the Researchers Found

Here’s what stood out:

1. Very few participants developed complications

Only 4.79% experienced bacterial complications that required antibiotics. Considering the size of the sample, that’s a notably low number.

2. The nutrients were extremely well tolerated

Just 0.56% reported any side effects, and all were mild.

This aligns with what we already know: vitamins, minerals and plant compounds tend to be gentle partners for the immune system.

3. The authors concluded the combination was helpful

According to the researchers, the nutrient blend showed promise for:

• Supporting well-being during seasonal viral challenges

• Helping the body recover more comfortably

• Reducing the risk of complications

• Being well tolerated even in large populations

It’s important to note: this wasn’t a randomised, placebo-controlled trial - so it can’t prove cause and effect. But real-world evidence on this scale is still valuable, especially when paired with the growing scientific literature on each nutrient individually.

Why This Combination Makes Sense

At Not the Norm, we love research that looks at nutrients not in isolation, but in synergy. Here’s why this quartet works so well together:

🟢 Vitamin C – The classic defender

Known for its antioxidant power and its role in normal immune function.

🟡 Vitamin D₃ – The sunshine signal

Low levels are common, especially during winter - and several clinical reviews have linked sufficient vitamin D to better immune resilience.

🔵 Zinc – The functional mineral

Essential for normal immune cell activity and antioxidant protection.

🟣 Quercetin – The plant-powered multitasker

Research shows quercetin has antioxidant, anti-inflammatory, and cell-protective properties. It’s also being studied for its ability to support the body during viral challenges.

When combined, these nutrients complement each other beautifully. Vitamin C helps recycle quercetin; zinc and vitamin D support coordinated immune responses; quercetin acts as a bioflavonoid partner to C - and so on.

Synergy matters. And this study underscores that principle.

Where CDQZ Immune Support Fits In

We formulated CDQZ Immune Support because we believed — long before this large study appeared - that these nutrients deserved to be brought together with integrity and attention to detail.

Our product features:

• Highly bioavailable forms

• Clean, transparent ingredients

• Zero synthetic fillers or unnecessary additives

• A carefully balanced ratio based on existing research

While we cannot and do not claim to diagnose, treat, or cure illnesses, we can say this:

✔ The nutrients in CDQZ Immune Support are backed by a growing body of scientific evidence.
✔ The new 2024 study adds real-world support for the safety and potential of this exact nutrient combination.
✔ And many people simply feel more confident going into winter with comprehensive nutritional support.

The Takeaway

Science doesn’t stand still - and neither do we. The new study strengthens the case for a well-designed combination of vitamin C, D₃, zinc and quercetin as part of a strategy to support everyday immune health.

And at Not the Norm, we’re proud to offer a formulation that aligns beautifully with where the evidence is heading.

If you’d like to experience this quartet of nutrients in a clean, carefully crafted supplement:

👉 Explore CDQZ Immune Support