It's really impossible to say. As you say, that's a low dose of zinc, well within limits, and probably not enough to leach out other nutrients to a noticeable degree. But zinc can be stimulating in small ways -- it ups immune system activity and it also can affect testosterone levels, usually in a beneficial way but I suppose a very sensitive person could notice. You also could be sensitive to the picolinic acid. With supplements, it's a process of experimentation, and by stopping this one you apparently solved the problem, which is the good thing about natural remedies -- they're almost always really easy to stop taking if there are adverse events.
Hi, thanks for the answer.
So, it's possible that higher immune system could kill parasites, bacteria or candida and bad toxins increase my anxiety...
I have tried to find information of picolinic acid but I haven't found much about side effects.