I tried medium doses of D3, Zinc and NAC a couple weeks ago. I had started C a month earlier. Then a week ago Friday I woke up with the worst nausea and high blood pressure. I discontinued all the supplements on Monday and the misery went away by Wednesday. I’m not sure if I caught a GI bug or the supplements were doing that, but it sure was nasty. It seems nausea is a not uncommon side-effect with those supplements.
you may have overloaded on zinc. search on that..i think nausea is one symptom
i only take zinc every other day and I take it with Vitamin A..also take it with copper because it started giving me gray hair in my eyebrows
The nausea was from the Zinc...try to cut back a bit. Hope you’re feeling better!
NAC would be more likely to cause low blood pressure.
I took all of those for at least two years, every day, with other supplements, and never had an issue. However, we stopped taking NAC daily, due to concern around a byproduct, TMAO.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6213249/
We still take it if we think a cold is coming on, because it is the main ingredient to thin mucus in cough syrups.
There are plenty of other antioxidants one can ingest, and we get those.
Roughly...C reduces or blocks zinc absorption- stop C use about an hour before taking zinc, and wait 30-ish mins after to resume C use.
Especially if taken on an empty stomach. I learned that the hard way.
Those supplements do not cause nausea.
What are your blood levels of vitamin D?