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The Medical “Allergy” That CAN’T Exist (Doctors Still List It)

Folks, here’s a question I hear all the time…

“Dr. Spreen, I want to take this certain supplement, but my doctor says I might be allergic to it. Is that real?”

And every single time, I have to resist the urge to throw something across the room.

Because here’s what’s really happening: mainstream medicine has been repeating—for DECADES—a so-called “contraindication” that violates basic biological logic.

It’s listed on drug inserts. It’s echoed at medical conferences. Pharmacists repeat it.

Doctors warn about it.

And it’s complete nonsense.

The “allergen” they’re warning you about? It’s something your body absolutely NEEDS to survive. Something you’d die without.

Think about that for a second. They’re saying you can be allergic to something ESSENTIAL for life.

That’s not just bad medicine. That’s a logical impossibility.

Let me show you why this particular piece of medical mythology should’ve been laughed out of every hospital years ago… and why it keeps surviving anyway.

I’m talking about the myth of “vitamin C allergy.”

According to official medical protocols, vitamin C is listed as a potential allergen. Patients are warned. Doses are limited. Some people avoid it entirely… out of fear.

Here’s the problem: you cannot be allergic to something that’s essential for survival.

Read that again.

Vitamin C is ESSENTIAL for human life. Your body can’t make it. You must get it from food or supplements. Without it, you develop scurvy and eventually die.

An allergy, by definition, means your body can’t tolerate something and you must AVOID it to prevent harm.

So let me spell this out:

If vitamin C were truly an allergen, you’d need to avoid it. But avoiding vitamin C would kill you. Therefore, vitamin C cannot be an allergen.

It’s that simple.

Yet “vitamin C allergy” appears in official medical documents, gets repeated by doctors, and scares seniors away from one of the most important nutrients they need.

Why? Because nobody bothered to THINK about it.

Some bureaucrat copied it into a protocol decades ago… Then another bureaucrat copied THAT protocol… Then hospitals copied hospital protocols… Then drug companies copied hospital language…

And repletion slowly replaced reasoning.

Now, some doctors will try to argue: “But the immune system can misfire! Maybe rare people DO react to vitamin C!”

Missing. The. Point. Even if someone had a weird reaction to high-dose IV vitamin C (which I’ll get to in a moment), that’s NOT an allergy.

It might be an intolerance. A formulation reaction. A dose issue. But it’s not an allergy.

Words have meanings. And “allergy” has a specific medical meaning: stay away or suffer harm.

You cannot stay away from vitamin C. Your body needs it every single day to make collagen, support your immune system, produce hormones, and maintain cellular health.

So where does this confusion come from?

There IS a real condition called G6PD deficiency—a genetic enzyme issue that affects red blood cells. People with severe G6PD deficiency can have problems with very high-dose INTRAVENOUS vitamin C because of how it temporarily creates hydrogen peroxide in the bloodstream.

But that’s NOT an allergy. It’s a metabolic issue. It’s NOT immune-related. And it does NOT apply to oral vitamin C.

Meanwhile, seniors who desperately NEED vitamin C—for immune function, wound healing, blood vessel health, and fighting oxidative stress—are being scared away from it by a medically impossible “allergy.”

Bottom line?

Vitamin C is essential. Period. You cannot be allergic to it in any meaningful medical sense.

If you’ve been told you’re “allergic” to vitamin C, that’s either a misunderstanding or medical nonsense.

G6PD deficiency is real but RARE, only matters for high-dose IV vitamin C, and does NOT affect oral supplementation.

Don’t let fear of a fake “allergy” rob you of one of nature’s most powerful health protectors.

Vitamin C supports immune defense, strengthens blood vessels, reduces inflammation, and protects against oxidative damage. Seniors don’t need less of it—they need MORE.

If a doctor tells you you’re “allergic” to vitamin C, ask them to explain how you can be allergic to something essential for life.

In Your Corner,

Dr. Allan Spreen

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Allan Spreen, M.D.
Dr. Allan Spreen, Chief Medical Advisor

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