
Lately we've been getting questions about how to check zinc at home. Zinc deficiency is surprisingly common. While it is an essential mineral needed in nearly all body tissues, zinc intake varies widely. Vegetarians may need up to 50% more zinc than non-vegetarians because phytates in vegetables and grains can limit how much zinc your body absorbs. Phytates inhibit the absorption of zinc; drinking tea and coffee, and high intakes of calcium, iron and copper can also limit zinc absorption.
Zinc is involved in over 200 different enzymatic reactions in the body and plays a vital role in DNA synthesis, normal growth and neurological development during pregnancy, childhood, and adolescence. It is also needed for hormone production, immune function, reproductive system, wound healing, taste, and smell.
Zinc is found in muscle, brain, liver, kidney, skin, pancreas, eye retina, and in the male prostate gland and sperm. That's why so many people ask us, am I zinc deficient, and it helps to know how to test zinc levels in the body.
Since the ability to taste zinc is directly proportional to the body’s reserve of this nutrient, performing a Zinc Taste Test, also known as a Zinc Challenge Test, is an easy, cost-effective way of measuring your total zinc status in less than 1 minute.
Zinc Taste Test Procedure
How to test for zinc deficiency?

First, purchase liquid zinc or a Zinc Taste Test Kit, preferably zinc sulfate (15 mg), from any health food store. Make sure you don’t eat, drink, or smoke for at least a half hour prior to the test. Put 2 teaspoons of the zinc solution in your mouth, swirling it for 30 seconds, then simply swallow it or spit it out.
Take note of your reactions to the zinc, expressed either as facial expressions or verbal comments. In the mouth, there is an enzyme polypeptide called gustin that is responsible for identifying the specific taste of zinc. This will allow you to estimate your zinc levels, by the intensity of the zinc you taste.
- If the zinc solution is tasteless or tastes like water, that may suggest lower zinc levels.
- A mild metallic taste in the mouth may suggest mild zinc status.
- A strong, bitter or highly metallic taste may suggest your zinc levels are adequate at this time.
In the case of zinc deficiency, eating foods rich in zinc is highly recommended, such as seafood (especially oysters), meat, dairy products, nuts, whole grains and beans. In severe zinc deficiency cases, a zinc supplement is required, whether that's capsules or zinc acetate lozenges.
Reading Your Taste Test Results
It’s scored in “intensity” (also known as a zinc tally): Tasteless indicates a more serious deficiency; a faint metallic taste means a milder deficiency; a strong bitter taste means you’re good. It’s a quick screen, not a lab test, but it can be a good starting point.
Foods Rich in Zinc
The top choice is oysters. Red meat, poultry, dairy, beans, nuts, whole grains and pumpkin seeds follow in order, and if you want the zinc content in pumpkin seeds per 100g, most sources put it around 7 to 8 mg. The animal source absorbs better than the plant sources because the phytates in the grains and legumes bind up the zinc.
Frequently Asked Questions
What does zinc taste like, and a que huele el zinc?
To someone with adequate zinc levels, the liquid zinc sulfate will taste quite strong and bitter, with a metallic aftertaste. Someone with low zinc levels may not taste much of anything, or even perceive it as water. It’s the perceived strength of the taste that is interpreted by the test.
How to test zinc levels at home?
The easiest way to check your zinc levels at home is with the zinc taste test, which uses a solution of zinc sulfate that you hold in your mouth for about a minute. This won’t give you an accurate measurement, but it will tell you whether you need more. If you’d like to get your zinc levels tested, let us know and we’ll tell you about a serum or red blood cell test you can order online.
Does zinc have a taste?
True. But again, whether or not you’ll actually taste that depends on your individual zinc status. A person who has normal zinc stores will typically experience a distinct metallic-bitter taste upon tasting a solution of zinc. A person who is low in zinc may experience no taste at all.
Why does zinc taste sweet?
At low concentrations of zinc, the taste might not be metallic at all, but rather a hint of sweetness or even wateriness. Zinc helps activate gustin, a taste-related protein, in the mouth. When you don't have much zinc in your body, you lose the bitterness of the metallic flavor, leaving behind the more pleasant flavors.
How much zinc to get taste back?
There isn't a single fixed number, since it depends on how deficient you are and how you absorb zinc. Some studies of zinc and taste have used daily supplemental zinc for weeks to months before taste function improves. We'd rather set your dose with a consultation than have you guess.
What foods contain zinc uk?
Oysters are the standout, with the highest concentration of any food. Other good alimente bogate in zinc include red meat, poultry, dairy, beans, nuts, whole grains, and pumpkin seeds. Animal foods tend to be absorbed more readily than plant foods, which carry phytates that limit zinc uptake.
Can you have too much zinc in your body?
Yes. Prolonged use of too much supplemental zinc can interfere with copper absorption and result in nausea or a zinc supplement taste in mouth that is distinctly metallic. It is recommended to track your total intake, as adults should limit their intake to 40 mg/day from all sources.
How to get more zinc in your diet?
You can add zinc-rich foods to your diet to support your zinc status. Oysters are the standout, with the highest concentration of any food. Other good choices include red meat, poultry, dairy, beans, nuts, whole grains, and pumpkin seeds. Keep in mind that animal foods tend to be absorbed more readily than plant foods, since phytates in grains and legumes bind up zinc and limit uptake. For personalized guidance, consult a qualified health care practitioner.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
References
- PubMed: The accuracy of the Zinc Taste Test method
- PubMed: A Taste-intensity Visual Analog Scale - An Improved Zinc Taste-test Protocol
- PubMed: Zinc taste test in pregnant women and its correlation with serum zinc level
- PubMed: Zn relates to improvement of swallowing function in older adults
- PubMed: Drug-related taste disturbances
- NIH Office of Dietary Supplements: Zinc Fact Sheet for Health Professionals
- PubMed: Effect of zinc supplementation on serum zinc and T cell proliferation in nursing home elderly
- PubMed: Nutritional modulation of age-related changes in the immune system and risk of infection
- MedlinePlus: Zinc in diet
- Zinc in Human Health and Infectious Diseases (2022)
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