Comments on: Zinc

By: Torin Doyle

Torin Doyle — Thu, 25 Jul 2024 08:29:22 +0000

Hi Jack.

Thanks for the info and links. It would be great to see a study on vegans with sleep issues and to compare those with and without zinc supplements.

I eat well but am concerned about my zinc levels after reading about absorption rates and phytates, etc.

I usually fall asleep pretty fast at the start of the night. I have issues with waking too early and not being able to get back to sleep. I just got Zinc gluconate (chelated) tablets [25mg] and will see how things go.

By: JackNorrisRD

JackNorrisRD — Wed, 24 Jul 2024 13:18:30 +0000

In reply to Torin Doyle. Torin, It seems possible but not nearly enough research has been done to know if it's a prevalent factor. I just added this sentence to the article above: A study of healthy adults found that eating oysters, which are high in zinc, improved sleep patterns, but it's not clear if the zinc component of the oysters was responsible (Saito, 2017, Cherasse, 2017). I didn't find any other research relevant enough to cite.

By: Torin Doyle

Torin Doyle — Sat, 20 Jul 2024 11:55:03 +0000

Hi Jack. What’s your take on too low zinc levels in vegans and poorer sleep?

By: JackNorrisRD

JackNorrisRD — Sun, 05 Feb 2023 23:50:17 +0000

In reply to b b.

b b,

> Is it possible that adequate zinc levels help to optimize iron absorption?

Sure, it seems possible.

By: b b

b b — Thu, 02 Feb 2023 18:34:36 +0000

https://pubmed.ncbi.nlm.nih.gov/30868025/

What do you think? Is it possible that adequate zinc levels help to optimize iron absorption? I saw this article but haven’t come across other sources saying the same thing, yet.

Thank you for the information in these articles!

By: Taylor Wolfram

Taylor Wolfram — Tue, 18 Feb 2020 18:34:49 +0000

In reply to Dan Louie. We recommend staying under the Upper Limit unless otherwise indicated by your medical provider.

By: Taylor Wolfram

Taylor Wolfram — Tue, 18 Feb 2020 17:37:56 +0000

In reply to Nikita Zhuk. Hi Nikita - The amount of zinc listed on the Nutrition Facts panel should be the amount of elemental zinc. The daily value for zinc has recently been changed to 11mg.

By: Nikita Zhuk

Nikita Zhuk — Sat, 08 Feb 2020 21:46:22 +0000

Dear Jack! This article https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/ states “The percentage of elemental zinc varies by form. For example, approximately 23% of zinc sulfate consists of elemental zinc; thus, 220 mg of zinc sulfate contains 50 mg of elemental zinc.”

So I started to think about the real amounts on zinc in popular suplements on Iherb. I found only 1 explicit statement “Country Life always labels minerals in elemental weight.”
Others just put it like “Zinc (zinc gluconate, zinc citrate) 15 mg = 136% of daily value” (By the way, different DV are used: some use 11 mg, some 15 mg as 100%)

Could you please comment on all that?

By: Dan Louie

Dan Louie — Thu, 06 Feb 2020 21:55:07 +0000

I’ve been taking a 50mg chelated zinc pill that I got from an OTC health provider. I thought it was safe. But now reading the comments it iffy at best.

By: JackNorrisRD

JackNorrisRD — Fri, 13 Jul 2018 02:53:39 +0000

In reply to Daniel.

Daniel,

I’ve found many zinc supplements with less than 50 mg, I’m surprised you haven’t been able to. The average vegan shouldn’t need to worry about copper when taking a modest zinc supplement. See here: https://staging.veganhealth.org/cadmium/