Zinc plays a vital role in many biological functions, so when levels are low, the effects can be significant.
If you're deficient while eating a typical mixed diet, the issue is likely absorption rather than intake.
In that case, taking a supplement will work far better than simply consuming more zinc-rich foods.
A can of sardines provides roughly 1mg of usable zinc.
By contrast, a modest 15mg Zinc BISglycinate supplement delivers about 8.5mg of bioavailable zinc—equivalent to 8.5 cans of sardines, and enough to fix even a mild deficiency.
The form matters enormously here. It has to be Zinc BISglycinate, not other types.
BISglycinate surrounds the zinc with 2 amino acids that the body absorbs easily. It acts like a Trojan Horse, sneaking past a digestive system that might otherwise reject it.
I prefer Thorne Micro Minerals, which contains 15mg of Zinc BISglycinate (a branded form called “TRAACS” found in other quality products).
Avoid doses above 20mg unless a blood test still shows deficiency after 6 weeks, because excess zinc can lead to copper deficiency. For the same reason, skip mineral supplements that contain copper unless you know you're low in it too.
For anyone with low zinc—even if it's within range but in the bottom 25%—fixing this, ideally bringing it into the top 25%, can dramatically improve quality of life. Fatigue, poor immunity, and even ADHD-like symptoms may clear up within a few weeks of supplementing.
