Zinc: Too much or too little spells trouble

Zinc is one of those nutrients you don’t hear a lot about. People are all over vitamin C, but zinc, an equally important nutrient for a strong immune system tends to take a back seat to all the hype.

Infact, during the pandemic, lower zinc levels were tied to a higher risk of death from the virus.

But unlike some vitamins where you’ve got to try hard to get too much (the Mayo Clinic says you’d have to consume 60,000 IU daily of vitamin D for several months to reach toxicity) — zinc can be a lot trickier…

If you have a severe zinc deficiency, you know it. You have skin rashes, severe diarrhea, hair loss, slow healing wounds, night blindness, and a bunch of other less-than-subtle symptoms.  And since zinc is critical to your immune system, a severe zinc deficiency puts you at risk for developing serious and even deadly infections, like pneumonia and sepsis.

But even if you’re just slightly short on zinc, it can have a pretty negative impact on your health.

Researchers from the Technical University of Munich found that if you have a moderate zinc deficiency your body may not give you any signs, but damage is still being done. Even a short-term zinc deficiency can put a kibosh on your body’s ability to properly digest food by inhibiting pancreatic function. And if you’re not digesting food properly, you know what that means… a downward spiral of improper nutrient absorption, poor immune function and chronic disease.

On the other end of the spectrum — if you get too much zinc — well, it puts a serious hamper on your health too causing symptoms like nausea, vomiting, loss of appetite, abdominal cramps, diarrhea and headaches. It can also cause anemia and impair your immune function.

Peak D3

When you step out into the sunlight, your body begins the process of making vitamin D. But getting the ideal amount can be difficult because some of us can’t effectively absorb it. That’s just one of many reasons the vitamin D deficiency is an epidemic… MORE⟩⟩


Where do you fall?

There are certain groups that are more at risk for having a zinc deficiency. They would include people with gastrointestinal disorders (ulcerative colitis, Crohn’s disease, etc.), vegetarians, pregnant and lactating women, people with sickle cell disease and alcoholics.

If you fall into one of these groups, you may want to get your zinc levels tested to see if you are deficient.

There’s also an easy at-home test that can reveal a zinc deficiency.

But the fact is, most Americans shouldn’t be concerned as much with a zinc deficiency as they should be about inadequate levels of vitamins C (46%) and D (95%), which are much higher. Only about 15% of Americans over the age of 19 aren’t getting enough zinc.

Still, that doesn’t mean all of us are out of the woods…

A nonprofit research organization known as The Environmental Working Group (EWG) found that close to half of U.S. children are consuming too much zinc because they’re eating a lot of zinc-fortified foods.

And if you’re an adult who eats zinc-fortified foods you could face the same problem as these kids.

Zinc-fortified cereals are the primary culprit. According to EWG, three percent of cold breakfast cereals give you 30 percent or more of your recommended daily zinc dosage in one bowl. And close to a third of breakfast cereals give you 20-to-25 percent of your daily zinc intake.

If any of this information is setting off alarm bells in your brain about your zinc levels, then go get your levels tested. That will give you a better idea of where you’re at zinc-wise and what you need to do to optimize your levels.

The National Institutes of Health say that adults should get 8 (women) to 11 mg (men) of zinc per day. The most zinc your body can handle without responding adversely is 40 mg.

If you’re worried you’re getting too much zinc, try to avoid overly fortified cereals and take a look at your multivitamin to see how much zinc it contains. That will give you a better idea of how much zinc-rich foods (like beef, shellfish, eggs and kidney beans) you should eat. And whatever you do, keep your zinc intake precise: at least 8 to 11 mg and under 40 mg per day, no more, no less!

Editor’s note: Are you feeling unusually tired? You may think this is normal aging, but the problem could be your master hormone. When it’s not working, your risk of age-related diseases skyrockets. To reset what many call “the trigger for all disease” and live better, longer, click here to discover The Insulin Factor: How to Repair Your Body’s Master Controller and Conquer Chronic Disease!

  1. “Zinc.” Oregon State University’s Linus Pauling Institute. http://lpi.oregonstate.edu. Retrieved June 9, 2016.
  2. “Zinc: Fact Sheet for Health Professionals.” The National Institutes of Health.
  3. Brugger, W.M. Windisch. “Subclinical zinc deficiency impairs pancreatic digestive enzyme activity and digestive capacity of weaned piglets.” British Journal of Nutrition, 2016; 1.
  4. “How Much is Too Much? : Up to Half of Young Children Get Too Much Vitamin A, Zinc and Niacin.” The Environmental Working Group. http://www.ewg.org. Retrieved June 9, 2016.
  5. Inadequacy of Immune Health Nutrients: Intakes in US Adults, the 2005–2016 NHANES
Jenny Smiechowski

By Jenny Smiechowski

Jenny Smiechowski is a Chicago-based freelance writer who specializes in health, nutrition and the environment. Her work has appeared in online and print publications like Chicagoland Gardening magazine, Organic Lifestyle Magazine, BetterLife Magazine, TheFix.com, Hybridcars.com and Seedstock.com.