If you take Prilosec, Nexium, or any acid reflux med — I need you to read this.
If you’re on birth control or if you’re a vegan or vegetarian — read this.
Blood pressure medication — definitely read this.
And if you get Botox — don’t worry, I’m not telling you to stop. But there’s something you should know that could make it work better. (More on that in a minute.)
There’s a mineral your body burns through every single day. Unlike iron or vitamin D, you can’t store it. There’s no reserve tank. You use it or you lose it — and the medications I just listed drain it even faster.
One study found acid reflux med users absorb 71% less of this mineral than healthy controls. That’s not a small dip, that’s a cliff!
Birth control pills significantly lower your levels too. In one study, participants whose levels dropped below 50 mcg/dL were significantly more likely to develop clinical symptoms.
ACE inhibitors and thiazide diuretics? They increase urinary loss — you’re literally peeing it out.
Vegan or eating mostly plant-based? Phytates in grains, legumes, and nuts can cut your absorption by up to 50%.
Between these medications alone, roughly a third of American adults are on at least one. Add in the plant-based crowd, add in the fact that the amount of this mineral in common vegetables has dropped 59% since 1978 — and the picture gets very clear very fast.
And the standard blood test is almost useless. Serum levels only drop once your cells have already been starved for months. So even if your bloodwork looks “normal,” you could still be running on fumes.
So what is this mineral we’re talking about?
It’s zinc.
And believe it or not, one of the first places zinc deficiency shows up isn’t your bloodwork. It’s your mouth!
Zinc deficiency shows up in your mouth before it shows up anywhere else. Here’s what to watch for:
→ Chronic bad breath that keeps coming back no matter how much you brush. (Zinc ions literally bind to the sulfur compounds that cause bad breath — without enough zinc, those compounds just keep building up.)
→ Canker sores. 28% of people with recurring canker sores are zinc deficient — compared to just 4% of people without them. That’s a 7x difference.
→ Dry mouth. Zinc activates a specific receptor in your salivary glands (called ZnR/GPR39) that triggers saliva production through a completely different pathway than anything else. If your zinc is low, that pathway goes quiet.
→ Food doesn’t taste right. A meta-analysis of 12 clinical trials found zinc supplementation significantly improved taste disorders — with some patients seeing over 40% improvement in 12 weeks.
→ Gums that are slow to heal. Zinc is essential for collagen synthesis and cell repair. If your gums bleed easily or take forever to bounce back after a cleaning, this could be why.
Here’s what the science says about zinc…
Immune function: In one meta-analysis, 70% of people taking zinc recovered from a cold by day 5 — compared to just 27% on placebo.
Sleep: A double-blind Italian RCT found that zinc (combined with magnesium and melatonin) significantly improved sleep quality in older adults. Better onset, longer duration, more rested.
Mood: Early double-blind trials suggest zinc may modestly improve outcomes when combined with antidepressant therapy — even in patients whose zinc levels were normal. The research is still emerging, but if you’re on an antidepressant, it’s worth knowing about.
Blood sugar: 20 mg of daily zinc cut the progression from prediabetes to type 2 diabetes by more than half in a 12-month trial.
Inflammation: Zinc significantly reduces C-reactive protein and IL-6 across 35 randomized controlled trials.
Bone density: Zinc therapy showed significant gains in bone mineral density at the spine and hip within 6-12 months in elderly patients.
Eye health: The landmark AREDS trial — 3,640 patients — found zinc + antioxidants reduced the risk of advanced macular degeneration by 25%.
Even your hair: A meta-analysis of nearly 5,000 people found that those with autoimmune hair loss had significantly lower zinc levels than healthy controls.
Oh — and remember the Botox thing I mentioned? A double-blind study found that zinc supplementation made Botox last about 30% longer. The effect was so noticeable that patients could actually tell when they were on zinc versus the placebo, which actually broke the blinding of the study.
This is why zinc is one of my top must-have supplements.
>> I take this zinc supplement every day.
Here’s why I chose this one:
→ Zinc picolinate — one of the most bioavailable and easily absorbed forms
→ 15 mg per capsule — the dose used in clinical research, without overdoing it
→ NSF Certified for Sport, third-party tested, no unnecessary fillers
If you’ve been dealing with any of the mouth symptoms I mentioned — especially if you’re on one of those medications — this might be the simplest, most impactful change you make this entire year.
— Mark
STUDIES CITED & FURTHER READING:
Medications & Zinc Depletion:
- Farrell CP, Morgan SL. “Proton Pump Inhibitors Interfere With Zinc Absorption and Zinc Body Stores.” Gastroenterology Research. 2016;9:243-251. PMID: 27957023
- Fallah S, Sani FV, Firoozrai M. “Effect of contraceptive pill on the selenium and zinc status of healthy subjects.” Contraception. 2009;80:40-43. PMID: 19501214
- Mitic N, Milosevic N, Cvetkovic T, et al. “Diuretics, Ca-Antagonists, and Angiotensin-Converting Enzyme Inhibitors Affect Zinc Status in Hypertensive Patients on Monotherapy: A Randomized Trial.” Nutrients. 2018;10(9):1284. PMID: 30208601
- WHO/FAO. “Human Vitamin and Mineral Requirements.” 2004. FAO Guidelines
Oral Health:
- Halboub ES, Al-Maweri SA, Parveen S, et al. “Zinc supplementation for prevention and management of recurrent aphthous stomatitis: a systematic review.” J Trace Elements in Medicine and Biology. 2021;68:126811. PMID: 34146924
- Oh J, Park K, Doo A, et al. “Zn2+ stimulates salivary secretions via metabotropic zinc receptor ZnR/GPR39 in human salivary gland cells.” Scientific Reports. 2019;9:18121. PMID: 31776425
- Mozaffar B, Ardavani A, Muzafar H, Idris I. “The Effectiveness of Zinc Supplementation in Taste Disorder Treatment: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.” J Nutrition and Metabolism. 2023;2023:6711071. PMID: 36937245
Immune Function:
- Hemilä H, Chalker E. “Zinc acetate lozenges may improve the recovery rate of common cold patients: an individual patient data meta-analysis.” Open Forum Infectious Diseases. 2017;4(2):ofx059. PMID: 28480298
Sleep:
- Rondanelli M, Opizzi A, Monteferrario F, et al. “The effect of melatonin, magnesium, and zinc on primary insomnia in long-term care facility residents in Italy: a double-blind, placebo-controlled clinical trial.” J Am Geriatrics Society. 2011;59(1):82-90. PMID: 21226679
Mood:
- Ranjbar E, Kasaei MS, Mohammad-Shirazi M, et al. “Effects of zinc supplementation in patients with major depression: a randomized clinical trial.” Iranian J Psychiatry. 2013;8(2):73-79. PMID: 24130605
Blood Sugar:
- Ranasinghe P, Wathurapatha WS, Ishara MH, et al. “Zinc supplementation in prediabetes: a randomized double-blind placebo-controlled clinical trial.” J Diabetes. 2018;10(5):386-397. PMID: 29072815
Inflammation:
- Mohammadi H, Talebi S, Ghavami A, et al. “Effects of zinc supplementation on inflammatory biomarkers and oxidative stress in adults: A systematic review and meta-analysis of randomized controlled trials.” Journal of Trace Elements in Medicine and Biology. 2021;68:126857. PMID: 34560424
Bone Density:
- Nakano M, Nakamura Y, Miyazaki A, Takahashi J. “Zinc Pharmacotherapy for Elderly Osteoporotic Patients with Zinc Deficiency in a Clinical Setting.” Nutrients. 2021;13(6):1814. PMID: 34071733
Eye Health:
- Age-Related Eye Disease Study Research Group. “A randomized, placebo-controlled, clinical trial of high-dose supplementation with vitamins C and E, beta carotene, and zinc for age-related macular degeneration and vision loss: AREDS Report No. 8.” Archives of Ophthalmology. 2001;119(10):1417-1436. PMID: 11594942
Hair Loss:
- Wu R, Li Y, Peng H, et al. “Association between serum trace elements level and alopecia areata: a systematic review and meta-analysis.” J Cosmetic Dermatology. 2025;24(1):e16740. PMID: 39739356
Botox:
- Koshy JC, Sharabi SE, Feldman EM, et al. “Effect of dietary zinc and phytase supplementation on botulinum toxin treatments.” J Drugs in Dermatology. 2012;11(4):507-512. PMID: 22453589