Science Brief · Hormones + Nutrition
Zinc and Testosterone: What the Science Says
Zinc supports normal testosterone levels mainly by correcting a deficiency. Deplete a zinc-sufficient adult's intake and testosterone falls; restore adequate zinc and it recovers.1 High-dose supplementation in already-replete individuals does not push levels above baseline.2 The relationship is real, but it is about sufficiency, not elevation.
The link between zinc and testosterone is one of the better-supported mineral-hormone relationships in nutrition science, and one of the most consistently oversimplified. Zinc is a genuine cofactor in the enzymatic machinery that produces testosterone across all adults, and deficiency, which is far more common than most people realize, measurably suppresses those levels. But "zinc keeps testosterone normal" and "zinc raises testosterone above normal" are two very different claims, and the clinical evidence only firmly supports the first.
// What's in this guide
01How zinc supports testosterone synthesis
Testosterone does not appear from nowhere. It is synthesized through a cascade of enzymatic reactions in the steroidogenesis pathway, starting from cholesterol and running through pregnenolone, progesterone, and DHEA before arriving at testosterone. Zinc participates in this process at multiple points, which is why the relationship between zinc and androgen levels is real biology, not marketing.
The key mechanisms are three. First, zinc is a structural cofactor for 17-beta-hydroxysteroid dehydrogenase, one of the terminal enzymes converting androstenedione into testosterone. Deficiency impairs this enzyme's activity directly.3 Second, zinc supports the hypothalamic-pituitary axis that regulates luteinizing hormone (LH) release. LH is the signal that tells Leydig cells to produce testosterone, and zinc-deficient individuals show blunted LH pulsatility.4 Third, zinc inhibits the aromatase enzyme that converts testosterone into estradiol, though the clinical significance of this effect at normal supplement doses is modest and context-dependent.
The practical implication: zinc is not a testosterone precursor in the way that DHEA is. It is more like the wrench that keeps the machinery turning. Pull the wrench out, the machine slows. The machine is not going to run faster just because you add more wrenches than the job requires.
Zinc supports testosterone synthesis by acting as a cofactor for key steroidogenic enzymes and supporting the LH signaling axis. It is a necessary input for a system that already works, not a fuel that accelerates it beyond normal output. Deficiency disrupts the system; sufficiency maintains it.
02The clinical evidence, honestly assessed
The evidence base for zinc and testosterone spans animal studies, dietary restriction trials, observational cross-sectional studies, and supplementation RCTs. The overall picture is coherent but more nuanced than most supplement content acknowledges.
| Study | Design | Population | Finding | Verdict |
|---|---|---|---|---|
| Prasad et al. (1996)1 | 3-arm: cross-sectional + restriction + supplementation | 40 healthy adults (cross-sectional); 4 young adults (restriction); 9 elderly marginally deficient (supplementation) | Zinc correlated with testosterone. Restriction over 20 weeks significantly reduced testosterone. Supplementation in deficient elderly supported recovery. | Supports deficiency-correction mechanism. Small samples. |
| Koehler et al. (2009)2 | Supplementation trial | Healthy, zinc-sufficient adults | High-dose zinc (3 mg/kg/day for 4 weeks) produced no significant increase in serum testosterone above baseline. | Strong evidence against elevation beyond baseline in replete individuals. |
| Jalali et al. (2023)5 | Systematic review of 38 papers (8 clinical, 30 animal) | Mixed clinical and animal literature | Serum zinc positively correlated with total testosterone. Deficiency reduces testosterone; supplementation improves levels, especially in deficient individuals. Effect size depends on baseline status and dosing. | Best current systematic synthesis. Confirms deficiency-correction as dominant mechanism. |
| Prasad et al. (2008)3 | Mechanistic review | Human and cellular studies | Zinc deficiency causes decreased serum testosterone and oligospermia via direct enzyme impairment and immune dysfunction. | Mechanistic confirmation. Not a dosing trial. |
| Omu et al. (2017)6 | Multicenter RCT | 67 patients with isolated hypogonadotropic hypogonadism | Adding zinc (40 mg/day) to standard FSH/hCG hormone therapy produced no significant additional benefit (success 55.9% vs 60.6%, P=0.69). | Adding zinc to an already-hormonally-supported population conferred no extra benefit. Confirms sufficiency ceiling. |
The 1996 Prasad study is the foundational one, and it has been cited thousands of times, often inaccurately. What it actually showed: zinc restriction in young, previously zinc-sufficient adults reduced their testosterone over 20 weeks. And nine elderly men with marginal zinc deficiency who supplemented for six months saw testosterone recovery. This is a deficiency-and-correction story, not a general "take zinc for more testosterone" story.1
The 2009 Koehler study is the one the supplement industry tends not to cite. Healthy zinc-sufficient men were given a genuinely high dose, around 3 mg per kilogram of body weight per day for four weeks, and saw no meaningful rise in testosterone compared to baseline.2 That experiment is the most direct test of the "zinc boosts testosterone" claim in replete adults, and it found nothing.
The 2023 systematic review by Jalali et al. synthesized the most comprehensive picture to date: positive correlation between serum zinc and testosterone, deficiency states reduce testosterone, supplementation in deficient individuals supports recovery. The qualification "particularly in deficient individuals" appears consistently across the good literature.5
Zinc restriction reduces testosterone in previously replete adults. Zinc supplementation supports testosterone recovery in deficient adults. High-dose zinc does not raise testosterone above normal in zinc-sufficient people. The evidence for all three of these statements is solid.
03Who actually benefits: the deficiency threshold
The critical question is whether you are zinc-sufficient. For a large portion of the global population, the answer is "probably not as much as you think." A 2012 analysis estimated that roughly 17.3% of the world's population faces inadequate zinc intake based on national food supply data, with rates exceeding 20% in most low- and middle-income countries.7 Even in high-income countries, certain groups consistently show low zinc status.
Higher-risk groups for zinc insufficiency
- People following plant-heavy diets: phytic acid in legumes, grains, and seeds binds zinc and reduces absorption. The zinc-to-phytate ratio in a diet predicts zinc availability better than total zinc intake.8
- Older adults: both reduced dietary intake and declining absorption efficiency with age. Marginal deficiency in the elderly is well-documented and is specifically what the Prasad supplementation trial studied.
- Athletes with high sweat losses: zinc is lost in sweat, and training volume increases daily losses. Endurance and strength athletes commonly run lower than the RDA on dietary zinc.
- People with gastrointestinal conditions: Crohn's disease, ulcerative colitis, short bowel syndrome, and chronic diarrhea all impair zinc absorption or increase losses.
- People on thiazide diuretics: this class of blood pressure medication increases urinary zinc excretion, chronically reducing serum zinc in people who use it long-term.9
- Alcohol-heavy intake: alcohol both reduces zinc absorption and increases urinary excretion.
If you fall into one or more of those categories, zinc supplementation is a reasonable step and has real evidence behind it for supporting normal testosterone as part of returning your mineral status to adequate. If you eat a varied diet with regular animal-source protein, sleep well, and have no known absorption issues, your zinc levels are probably fine, and supplementation will do little for your testosterone specifically, though it may still support other functions like immune defense and skin health.
A serum zinc test is the most practical starting point if you are unsure. Normal serum zinc in adults is roughly 70 to 120 micrograms per deciliter, though this measure has limitations (serum zinc does not perfectly reflect cellular zinc stores). A qualified clinician can help interpret your results in context.
04Testosterone, zinc, and all genders
Testosterone is not an exclusively male hormone, and the zinc-testosterone relationship is not exclusively a male concern. Testosterone plays important roles across all adults: in those with ovaries, it supports bone density, mood, libido, and lean muscle maintenance. Zinc's role as a cofactor in steroidogenesis applies regardless of which hormones are being produced at what reference range.
Most foundational zinc-testosterone clinical studies used male subjects, which is a genuine limitation of the literature. The 1996 Prasad study and the 2009 Koehler high-dose trial were both male-only. The 2023 systematic review by Jalali et al. included animal studies using both sexes and noted that the positive correlation between serum zinc and testosterone held across both, though the effect sizes were documented most precisely in male populations.5
What can be said with reasonable confidence for all adults: zinc deficiency impairs the enzymatic machinery behind androgen production. Correcting that deficiency supports normal hormone synthesis. The ceiling effect, where high-dose supplementation in replete individuals does nothing for testosterone, almost certainly applies across genders too, since the underlying mechanism is about enzyme cofactor sufficiency rather than precursor loading.
One additional note for people assigned female at birth: the bioavailability crossover study by Gandia et al. (2007) specifically enrolled 12 healthy female volunteers and found zinc bisglycinate produced 43.4% higher serum zinc levels than gluconate.10 This is relevant because much of the supplement bioavailability literature uses male cohorts; this is one of the cleaner female-specific data points for form selection.
Testosterone matters to all adults, and zinc supports its synthesis across all people who produce it. Most clinical trials used male subjects, so effect-size precision is better established in that population. The underlying biochemistry, zinc as a steroidogenic enzyme cofactor, is not sex-specific.
05Zinc supplement forms compared
If you decide to supplement, the form matters more than most people realize. Different chemical forms of zinc absorb at significantly different rates, and the cheapest options are often the worst absorbed. The research here is reasonably clear.
| Form | Typical elemental zinc | Absorption | Key notes |
|---|---|---|---|
| Zinc bisglycinate (amino acid chelate) Best absorbed | 25-30 mg | +43% vs gluconate by AUC10 | Chelate structure protects zinc from pH-dependent precipitation. Maintains bioavailability at higher gastric pH (relevant for elderly and PPI users). Gentlest on the stomach. This is the form in MAXXING's Zinc About It. |
| Zinc gluconate | 14-15 mg | ~61% fractional absorption9 | Well-studied, widely available, reasonably well absorbed. Common in lozenges. Lower elemental zinc per gram than bisglycinate. |
| Zinc citrate | 30 mg | ~61% fractional absorption11 | Comparable to gluconate in isotope-tracer studies. Good tolerability. Slight taste noted in some formulations. |
| Zinc picolinate | 50 mg | Mixed; tissue zinc elevated in some measures12 | Older 1987 study showed hair, urine, and erythrocyte zinc increases but no serum change. More recent evidence less favorable. High dose (50 mg) common; exceeds the 40 mg UL for some formulations. |
| Zinc sulfate | 23 mg | Moderate | Older clinical acne trials used this form. More likely to cause nausea and GI discomfort, especially on an empty stomach. Generally not the preferred choice for daily supplementation. |
| Zinc oxide | 20 mg | ~50%, with some individuals at near zero9 | Consistently the lowest-absorbed form in head-to-head studies. Some individuals absorb almost none. Common in multivitamins and budget supplements due to low cost. Avoid as a primary zinc source. |
The standout finding from the bioavailability literature is the gap between bisglycinate and the rest. A randomized crossover trial published in the International Journal of Vitamin and Nutrition Research enrolled 12 healthy female volunteers who took single 15 mg elemental zinc doses of bisglycinate and gluconate on separate occasions, with a 7-day washout period. Bisglycinate produced 43.4% higher AUC and significantly higher peak serum zinc.10 A 2024 narrative review in Nutrients confirmed bisglycinate as one of the best-absorbed forms overall, noting its particular advantage at higher gastric pH, which makes it a better choice for older adults and anyone on proton pump inhibitors.13
In vitro digestion modeling published in Nutrients (2023) showed bisglycinate's chelate structure physically protects zinc from precipitation at varying pH levels, which explains the consistent absorption advantage seen in vivo.14 For a broader look at what zinc supports beyond testosterone, see our guide on what zinc is good for. If you are building a full supplement protocol, the supplement stacking guide covers how zinc fits with other compounds.
06Dosing, safety, and the copper problem
Zinc has one of the most important safety caveats in the supplement space: excess intake causes copper deficiency, and the consequences can be serious.
Reference intakes
The NIH Recommended Dietary Allowance (RDA) is 11 mg per day for adult males and 8 mg per day for adult females. The Tolerable Upper Intake Level (UL) for adults 19 and over is 40 mg per day. The European Food Safety Authority sets a slightly more conservative UL of 25 mg per day.9 Most of the clinical studies that showed testosterone support in deficient individuals used doses between 25 and 45 mg elemental zinc per day, meaning the effective therapeutic dose sits close to or at the upper limit.
The copper depletion problem
Zinc and copper compete for absorption via intestinal metallothionein, the transporter that pulls both minerals into the gut wall. When you flood the system with zinc, metallothionein binds it preferentially and traps copper inside enterocytes, where it gets shed rather than absorbed. Chronic high zinc intake above 40 mg per day causes measurable copper depletion over months.15
The consequences of copper deficiency include normocytic anemia, neutropenia (low white blood cell count), and neurological problems including peripheral neuropathy. A documented case report from 2021 described an 81-year-old who developed pancytopenia (critically low counts of all blood cell types) after taking 80 mg of zinc daily for macular degeneration. Her serum copper was critically depleted. After stopping zinc and starting copper supplementation, her white blood cell count recovered from 1.35 to 7.13 x 10^9 per liter within 2 to 4 weeks.16 The diagnostic delay averaged 12 months in documented cases, which is worth noting: copper deficiency from excess zinc does not announce itself quickly.
Practical guidance
- For most adults without a known deficiency, 25 to 30 mg elemental zinc per day from bisglycinate is a reasonable, well-tolerated daily dose that sits below the UL.
- If supplementing consistently at 25 mg or above, consider a zinc product that includes a small amount of copper (1 to 2 mg), or eat copper-rich foods regularly (liver, shellfish, nuts, seeds).
- Do not exceed 40 mg per day without clinical guidance, and do not exceed it at all long-term.
- Take zinc with food to reduce nausea, which is the most common side effect at higher doses.
The doses that support testosterone in deficient individuals sit close to the upper safe limit. Going above 40 mg per day chronically risks copper depletion, which causes real harm over months. The solution is to stay at or below the UL and include a small copper source if supplementing consistently. This is not a reason to avoid zinc, it is a reason to use it precisely.
07Drug and nutrient interactions worth knowing
Zinc interacts with several common medications in ways that affect both the drug and the mineral. These are not theoretical concerns: the chelation is well-documented pharmacokinetically.
- Quinolone antibiotics (ciprofloxacin, levofloxacin): zinc forms an insoluble complex that reduces antibiotic bioavailability and can cause treatment failure. Take the antibiotic at least 2 hours before or 4 to 6 hours after zinc.9
- Tetracycline antibiotics (doxycycline, minocycline): same chelation problem. Take the antibiotic 3 hours before or 1 hour after zinc. This interaction is particularly relevant for people using tetracyclines for acne, which is a common indication among MAXXING readers.
- Penicillamine (used for rheumatoid arthritis and Wilson's disease): chelates zinc directly. Separate by at least 1 hour.
- Thiazide diuretics (hydrochlorothiazide, chlorthalidone): increase urinary zinc excretion. People on long-term thiazides may have meaningfully higher zinc requirements and could benefit from supplementation specifically.
- High-dose iron supplements (25 mg or more): compete with zinc for absorption when co-administered. If you take both, space them out by at least 2 hours, or take zinc away from your main iron dose.
None of these interactions require avoiding zinc. They require timing awareness, which is straightforward once you know about them.
08Zinc in a supplement stack: where it fits
Zinc does not work in isolation, and building a supplement stack intelligently means understanding which combinations help and which interfere. The stacking guide covers this in full, but here is where zinc sits specifically.
What zinc pairs well with
Zinc and magnesium support similar systems, and the two are often found together in evening supplement protocols (sometimes alongside vitamin B6 in formulations marketed under various names). The combination is reasonable since magnesium also supports testosterone-related enzymes and sleep quality, both of which indirectly influence hormone levels. Vitamin D and zinc also complement each other in immune function, and there is some evidence that sufficient status of both together supports better overall androgen signaling.4
What needs spacing
As noted above, take zinc separately from iron supplements and from the antibiotics that chelate it. Also take zinc separately from calcium-rich meals or high-dose calcium supplements, since calcium can reduce zinc absorption at the gut level. For most people, a consistent time that is away from those competing factors (a light evening meal, for instance) works well. Browse the GymMaxxing collection for how MAXXING structures mineral supplementation for active adults.
The skin overlap
One underappreciated aspect of zinc's role in testosterone synthesis is the skin connection: 5-alpha-reductase, the enzyme that converts testosterone into DHT, is inhibited by zinc at the cellular level. This is relevant for oily skin and hormonal breakouts, where high DHT activity drives sebaceous gland overactivity. Zinc's 5-alpha-reductase inhibition is one of the proposed mechanisms for its well-documented benefit in inflammatory acne. Managing zinc status is, in a real sense, managing both ends of the testosterone-DHT axis simultaneously. For more on zinc's skin applications, that article goes into the acne evidence in depth.
MAXXING's Zinc About It uses zinc bisglycinate at 25 mg elemental zinc per serving, the best-absorbed form, below the upper limit, and without unnecessary fillers. It is the form and dose that the bioavailability and clinical literature actually support. No testosterone-boosting claims, because the evidence does not support them for replete adults, and this team does not make claims the science has not earned.
09Frequently asked questions
Zinc supports normal testosterone levels primarily when correcting a deficiency. Studies show that restricting zinc in zinc-sufficient adults causes testosterone to fall, and that supplementing zinc-deficient individuals supports a return toward normal levels. However, high-dose zinc supplementation in people who are already zinc-sufficient does not significantly raise testosterone above baseline. The evidence is strong for the deficiency-correction mechanism; the evidence for a testosterone-boosting effect in replete individuals is weak.
The NIH RDA is 11 mg per day for adult males and 8 mg per day for adult females. The tolerable upper intake level for adults is 40 mg per day. Most clinical studies that showed testosterone support used doses in the 25 to 45 mg elemental zinc per day range in participants who were zinc-deficient. There is no established benefit to exceeding the upper limit, and chronic doses above 40 mg per day can deplete copper and cause other harms. Zinc bisglycinate at 25 to 30 mg elemental zinc per day is a reasonable, well-tolerated target for most adults.
The evidence for this is weak. A 2009 study gave healthy, zinc-sufficient adults a high dose for four weeks and found no significant increase in serum testosterone. This is consistent with the broader picture: zinc supports the system that produces testosterone, but if that system is already adequately resourced, adding more zinc does not push output higher. The effect is specifically one of correction, not enhancement above baseline.
Yes. Testosterone is a relevant hormone for all genders, though normal reference ranges differ. Zinc is a cofactor in the enzymatic pathways that support testosterone synthesis across all people who produce it. Most of the foundational clinical studies used male subjects, so direct extrapolation to female physiology requires some caution. However, the basic mechanism, zinc as a cofactor in androgen synthesis, is not sex-specific. Deficiency effects likely apply broadly.
Common signs include recurrent infections, slow wound healing, hair shedding, skin changes (including inflammatory acne), reduced appetite and taste acuity, and fatigue. Reproductive symptoms in adults, including reduced libido and, in those who produce sperm, lower sperm quality, are also associated. Zinc deficiency is more common than most people expect: the WHO estimates roughly 17 percent of the global population faces inadequate zinc intake, with higher rates in populations relying heavily on plant-based diets due to phytate content.
Zinc bisglycinate (zinc glycinate chelate) and zinc gluconate are the best-absorbed forms in head-to-head clinical comparisons. A randomized crossover trial found zinc bisglycinate produced 43.4 percent higher serum zinc levels compared to zinc gluconate in a single-dose study. Zinc citrate absorption is comparable to gluconate at around 61 percent fractional absorption. Zinc oxide consistently underperforms, with fractional absorption around 50 percent and some individuals showing near-zero absorption. The chelated forms, particularly bisglycinate, also maintain their bioavailability at higher gastric pH, which matters for older adults and people using proton pump inhibitors.
Yes. The NIH tolerable upper intake level for adults is 40 mg elemental zinc per day. Chronic doses above that threshold can cause nausea, reduced immune function, lowered HDL cholesterol, and zinc-induced copper deficiency. Because zinc and copper compete for absorption via metallothionein in the gut, high zinc intake suppresses copper absorption. Severe copper depletion can cause anemia, neutropenia, and neurological problems. Stay at or below 40 mg per day, and consider a zinc supplement that includes a small amount of copper if using long-term.
Yes, and this matters practically. Zinc forms insoluble complexes with quinolone antibiotics (like ciprofloxacin) and tetracycline antibiotics, reducing bioavailability of both. The NIH recommends spacing: take the antibiotic at least 2 hours before, or 4 to 6 hours after, zinc. Tetracyclines require zinc to be taken 3 hours before or 1 hour after. Penicillamine requires at least 1 hour separation. Thiazide diuretics increase urinary zinc excretion, so people on those medications may have higher zinc requirements. High-dose iron supplements taken at the same time can also reduce zinc absorption.
Semen contains a meaningful concentration of zinc, roughly 1.5 to 3 mg per ejaculation depending on volume. Frequent ejaculation does represent a source of zinc loss, but for most adults eating a reasonably balanced diet, it is unlikely to cause clinically significant deficiency on its own. That said, if you are already borderline low on zinc intake, this loss adds up. Meeting the RDA of 11 mg per day for adult males supports healthy zinc status across the board.
Zinc supports normal testosterone levels in zinc-deficient individuals, and testosterone plays a role in libido and sexual function. There is no direct clinical evidence that zinc supplementation improves erectile quality as a standalone effect, particularly in people who are already zinc-sufficient. If low zinc is contributing to suboptimal testosterone, correcting the deficiency may support overall sexual health as part of a broader picture. For medical concerns about erectile function, consult a healthcare professional.
For anyone managing their testosterone levels, zinc bisglycinate is the most bioavailable form based on head-to-head clinical comparisons, producing significantly higher serum zinc versus zinc gluconate in controlled trials. Zinc oxide is the least reliable option and should be avoided. A dose of 25 to 30 mg elemental zinc per day from bisglycinate covers the RDA with room for absorption variability, without pushing toward the 40 mg upper limit. Pairing with a small amount of copper is wise for long-term use.
References
- Prasad AS, Mantzoros CS, Beck FW, Hess JW, Brewer GJ. "Zinc status and serum testosterone levels of healthy adults." Nutrition. 1996;12(5):344-348. doi:10.1016/s0899-9007(96)80058-x
- Koehler K, Parr MK, Geyer H, Mester J, Schänzer W. "Serum testosterone and urinary excretion of steroid hormone metabolites after administration of a high-dose zinc supplement." European Journal of Clinical Nutrition. 2009;63(1):65-70.
- Prasad AS. "Zinc in Human Health: Effect of Zinc on Immune Cells." Molecular Medicine. 2008;14(5-6):353-357. doi:10.2119/2008-00033.Prasad
- Netter A, Hartoma R, Nahoul K. "Effect of zinc administration on plasma testosterone, dihydrotestosterone, and sperm count." Archives of Andrology. 1981;7(1):69-73.
- Jalali GR, Roozbeh J, Mohammadzadeh A, Sharifian M. "Correlation between serum zinc and testosterone: A systematic review." Journal of Trace Elements in Medicine and Biology. 2023;75:127124. doi:10.1016/j.jtemb.2022.127124
- Omu AE, Al-Azemi MK, Omu FE. "The effectiveness of zinc supplementation in men with isolated hypogonadotropic hypogonadism." Asian Journal of Andrology. 2017;19(2):227-231. doi:10.4103/1008-682X.189621
- Wessells KR, Brown KH. "Estimating the global prevalence of zinc deficiency: results based on zinc availability in national food supplies and the prevalence of stunting." PLoS One. 2012;7(11):e50568. doi:10.1371/journal.pone.0050568
- Hess SY, Peerson JM, King JC, Brown KH. "Zinc deficiency in low- and middle-income countries: prevalence and approaches for mitigation." Journal of Human Nutrition and Dietetics. 2020;33(6):842-853. doi:10.1111/jhn.12791
- National Institutes of Health Office of Dietary Supplements. "Zinc: Health Professional Fact Sheet." Updated 2024. ods.od.nih.gov
- Gandia P, Bour D, Maurette JM, et al. "A bioavailability study comparing two oral formulations containing zinc (Zn bis-glycinate vs. Zn gluconate) after a single administration to twelve healthy female volunteers." International Journal of Vitamin and Nutrition Research. 2007;77(4):243-248. doi:10.1024/0300-9831.77.4.243
- Tompkins TA, Renard NE, Kiuchi A. "Zinc Absorption by Young Adults from Supplemental Zinc Citrate Is Comparable with That from Zinc Gluconate and Higher than from Zinc Oxide." Journal of Nutrition. 2014;144(2):132S-136S. doi:10.3945/jn.113.181487
- Stanton MF, Lowenstein FW. "Comparative absorption of zinc picolinate, zinc citrate and zinc gluconate in humans." Agents Actions. 1987;21(1-2):223-228. doi:10.1007/BF01974946
- Kapravelou G, Martínez R, Andrade AM, et al. "Comparative Absorption and Bioavailability of Various Chemical Forms of Zinc in Humans: A Narrative Review." Nutrients. 2024;16(24):4269. doi:10.3390/nu16244269
- Wegmüller R, Tay F, Zeder C, Brnic M, Hurrell RF. "Comparison of the Potential Relative Bioaccessibility of Zinc from Different Zinc Supplement Formulations Using In Vitro Digestion." Nutrients. 2023;15(6):1434. doi:10.3390/nu15061434
- Plum LM, Rink L, Haase H. "Zinc Toxicity: Understanding the Limits." Molecules. 2024;29(13):3130. doi:10.3390/molecules29133130
- Bhalla P, Chadha M, Sahni S, Shea S. "Zinc-induced hypocupremia and pancytopenia, from zinc supplementation to its toxicity, a case report." Journal of Community Hospital Internal Medicine Perspectives. 2021;11(5):712-714. doi:10.1080/20009666.2021.1983319
