Here’s a fun way to test for a zinc deficiency, which is common in many people, especially those with compromised immune systems: do a zinc challenge.
It’s very easy to do: buy some Zinc Challenge, put a little in a cup, swish it in your mouth, then spit it out. It will taste different depending on your zinc status.
People with a zinc deficiency commonly have either a poor sense or a hyper-sensitive sense of taste and smell, and they won’t be able to taste the zinc sulfate monohydrate that’s in Zinc Challenge.
Those with sufficient zinc will notice that it tastes like old eggs and will want to spit it out immediately. In my experience, most people think it tastes like water.
Be sure not to tell anyone ahead of time (especially kids) what kind of tastes to expect!
