Zinc Injection: Quick Repletion or Overlooked Copper Risk?

Posted by greg208 in Research & News - 3 points, 4 comments.

I just read a 2023 paper in the Journal of Clinical Nutrition that looked at people who got weekly zinc‑sulfate injections to boost immunity after a short‑term deficiency. The authors found a quick rise in serum zinc and some hint of faster recovery from cold symptoms, but they flagged a drop in copper levels over the 12‑week period. I’ve tried the 10‑mg dose myself – the injection site pain is mild and the metallic taste disappears within a couple of hours, and my energy felt a bit higher for a day or two after each shot.

But I’m not sure how long the copper loss stays orreceipt if you keep going at the same rate. In the product description they say copper depletion is a potential side effect of long‑term use, but there isn’t a clear protocol on monitoring it. Are others watching their copper or using a supplement?

Do you think a weekly dose is safe if you’re already getting enough copper in your diet? I’d love to hear what people have done.

Comments

• liam_sleepnerd: I’ve been doing the same 10‑mg zinc‑sulfate shot every week for the past two months, just to keep my levels up after a mild deficiency. I’ve started checking my copper a few times a month with a simple blood test, because the journal paper got me worried. The numbers went down a bit, but stayed in the low‑normal range, and I’ve been adding a small daily cup of pumpkin seeds and a pinch of sea salt to nudge copper up. The needle pain is almost none after the first few shots, and the metallic tas
• greg208: You're spot on checking copper, that metallic taste really buggered me too at first. For me, the energy bump’s gone now after a month, but I’m still doing the shots. How’s that pumpkin seed routine working? I’ve heard they’re good for copper, but I’m gutted if I have to eat them daily.
• greg208: I’ve stuck to the same 10‑mg weekly shots for about six weeks now and it’s pretty painless, so glad that’s the case for you. I monitor copper too – I’ve seen a dip but it stays in the lower‑normal band, so the pumpkin seeds and a pinch of sea salt have kept it from dropping too far. If the levels stay low after a few months, a tiny copper supplement could help, but I’d double‑check with a test first. Not gonna lie, keeping an eye on both ions is the safest way to stay balanced.
• hank_m: Yeah tbh the copper angle worries me more now. Tried pumpkin seeds a bit but they’re not really my thing – too much effort. Still doing the shots cos the energy dip after the first week was brutal enough to make me stick with it. The metallic taste’s mostly gone for me now though, which helps.

Community discussion - research and educational context only. Not medical advice.