Evidence-based·Last reviewed May 31, 2026·How we grade evidence

Manganese sulfate

MineralManganese salt

Manganese sulfate is the common inorganic Mn form in low-dose multi-mineral and bone-health supplements. Healthy adults rarely need it — most diets exceed the 2.3 mg/day AI from whole grains, nuts, tea, and leafy greens. Chronic high intake (typically >11 mg/day) risks manganese neurotoxicity (parkinsonism).

Quick decision guide

May help most

Trace-mineral coverage as part of a bone-health or comprehensive multi-mineral formula at ≤2 mg/day. Stand-alone manganese is rarely indicated.

Common dosing range

1–2 mg/day as part of a multi-mineral; stand-alone Mn sulfate at this dose is uncommon and rarely needed.

When to expect effects

Status changes within weeks; clinical benefit largely undocumented in non-deficient adults.

Watch out for

Don't exceed 11 mg/day from all sources. Avoid in cholestatic liver disease — biliary excretion is the only route to clear manganese, so liver disease causes brain accumulation.

Evidence snapshot

Trace-mineral coverage in multi-mineral formulasModerate

Bone health (multi-mineral combos)Low (combo only)

Osteoarthritis (in glucosamine-chondroitin combos)Low (combo only)

Stand-alone Mn for any indicationVery low

What is it

Manganese sulfate (MnSO4) is an inorganic salt of the essential trace mineral manganese, most often supplied as the monohydrate (MnSO4·H2O), a pale-pink crystalline solid. In dietary supplements it is one of the most common sources of supplemental manganese, alongside manganese gluconate, citrate, picolinate, ascorbate, and chelates. Manganese is a cofactor for enzymes including manganese superoxide dismutase, arginase, pyruvate carboxylase, and several glycosyltransferases involved in connective tissue synthesis. Dietary requirements are met by whole grains, legumes, leafy vegetables, tea, and nuts; supplemental manganese sulfate is typically included in multivitamin-mineral products at small doses.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if…

You're taking a comprehensive multi-mineral or bone-health formula that includes 1–2 mg manganese — that's a sensible trace amount

You have a documented cause of malabsorption (severe IBD, short bowel) and a clinician is replacing trace minerals

You're on long-term parenteral nutrition under medical supervision (Mn is added carefully because too much accumulates in the brain)

Probably skip if…

You eat any reasonable diet with whole grains, nuts, leafy vegetables, or tea — frank Mn deficiency has never been documented in healthy humans

You're stacking multiple supplements that each contain manganese — the additive intake easily crosses 11 mg/day

You have any form of cholestatic liver disease (PBC, PSC, cirrhosis) — impaired biliary excretion means Mn accumulates in the basal ganglia

You drink well water that hasn't been tested for manganese — water Mn is the most underrecognized source of excess intake

You're hoping for a specific clinical benefit from stand-alone manganese — there's essentially no quality RCT evidence

Evidence at a glance

Goal	Effect	Best fit	Time
Trace-mineral coverage in bone or multi-mineral formulas Limited Evidence	Mineral combo (Zn 15 mg + Cu 2.5 mg + Mn 5 mg) additive to 1,000 mg calcium for slowing spinal BMD loss; Mn-specific effect not isolated	Postmenopausal women already on calcium ± vitamin D wanting trace-mineral coverage as part of a bone formula	Trial measured 2-year BMD changes; clinical fracture endpoints not assessed
Osteoarthritis (combination formulas with glucosamine/chondroitin) Limited Evidence	No isolated Mn effect on OA outcomes; combination products show modest symptom improvement attributable mainly to glucosamine/chondroitin	People already taking glucosamine + chondroitin who happen to be on a product that includes Mn ascorbate	Glucosamine/chondroitin trials run 6 months to 3 years
Correction of frank manganese deficiency Limited Evidence	Effective when deficiency exists, but deficiency is essentially undocumented in free-living adults	Patients with rare transporter mutations or on long-term parenteral nutrition under specialist care	Weeks to months for tissue repletion
Premenstrual mood and pain symptoms Mixed Evidence	Severe Mn deprivation worsened PMS symptoms; no evidence of benefit from supplementation above the AI	None — this is not a supplement use case	Not established

Trace-mineral coverage in bone or multi-mineral formulas

Limited Evidence

Effect: Mineral combo (Zn 15 mg + Cu 2.5 mg + Mn 5 mg) additive to 1,000 mg calcium for slowing spinal BMD loss; Mn-specific effect not isolated
Best fit: Postmenopausal women already on calcium ± vitamin D wanting trace-mineral coverage as part of a bone formula
Time: Trial measured 2-year BMD changes; clinical fracture endpoints not assessed

Osteoarthritis (combination formulas with glucosamine/chondroitin)

Limited Evidence

Effect: No isolated Mn effect on OA outcomes; combination products show modest symptom improvement attributable mainly to glucosamine/chondroitin
Best fit: People already taking glucosamine + chondroitin who happen to be on a product that includes Mn ascorbate
Time: Glucosamine/chondroitin trials run 6 months to 3 years

Correction of frank manganese deficiency

Limited Evidence

Effect: Effective when deficiency exists, but deficiency is essentially undocumented in free-living adults
Best fit: Patients with rare transporter mutations or on long-term parenteral nutrition under specialist care
Time: Weeks to months for tissue repletion

Premenstrual mood and pain symptoms

Mixed Evidence

Effect: Severe Mn deprivation worsened PMS symptoms; no evidence of benefit from supplementation above the AI
Best fit: None — this is not a supplement use case
Time: Not established

Evidence for 4 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Trace-mineral coverage in bone or multi-mineral formulas

Corrects deficiency

Limited Evidence

Manganese is an essential cofactor for glycosyltransferases (involved in cartilage/bone matrix synthesis) and the antioxidant enzyme MnSOD. A 2-year RCT in 59 postmenopausal women on 1,000 mg calcium showed addition of a trace-mineral trio (zinc + copper + manganese 5 mg) further reduced spinal BMD loss vs calcium alone — but the trial can't isolate the manganese contribution from zinc and copper.

Effect size

Mineral combo (Zn 15 mg + Cu 2.5 mg + Mn 5 mg) additive to 1,000 mg calcium for slowing spinal BMD loss; Mn-specific effect not isolated

Time to effect

Trial measured 2-year BMD changes; clinical fracture endpoints not assessed

Best fit

Postmenopausal women already on calcium ± vitamin D wanting trace-mineral coverage as part of a bone formula

Less likely

Healthy adults already getting Mn from whole grains, nuts, and tea

Bottom line: A reasonable trace addition (1–2 mg) inside a bone formula; stand-alone Mn sulfate isn't supported.

SourceStrause et al., 1994 — Journal of Nutrition NIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet

Osteoarthritis (combination formulas with glucosamine/chondroitin)

Mechanism only

Limited Evidence

Some OA supplements pair glucosamine sulfate + chondroitin sulfate with manganese ascorbate, on the rationale that Mn is a cofactor for glycosaminoglycan synthesis. Reviews of these combinations show modest symptom relief vs placebo, but the contribution of the manganese component has never been isolated — the glucosamine and chondroitin almost certainly do the work.

Effect size

No isolated Mn effect on OA outcomes; combination products show modest symptom improvement attributable mainly to glucosamine/chondroitin

Time to effect

Glucosamine/chondroitin trials run 6 months to 3 years

Best fit

People already taking glucosamine + chondroitin who happen to be on a product that includes Mn ascorbate

Less likely

Anyone considering stand-alone Mn sulfate for joint pain

Bottom line: Don't add stand-alone manganese for arthritis — the evidence is from combination products and the Mn component is unproven.

SourceReginster et al., 2017 — Drugs NIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet

Correction of frank manganese deficiency

Corrects deficiency

Limited Evidence

True manganese deficiency has not been definitively documented in healthy humans on normal diets. The handful of suspected cases come from extreme experimental diets or genetic transporter defects (SLC39A14 mutations). For documented deficiency, clinicians dose Mn carefully — usually within multi-mineral parenteral nutrition rather than as a stand-alone oral supplement.

Effect size

Effective when deficiency exists, but deficiency is essentially undocumented in free-living adults

Time to effect

Weeks to months for tissue repletion

Best fit

Patients with rare transporter mutations or on long-term parenteral nutrition under specialist care

Less likely

Anyone eating a normal mixed diet

Bottom line: Frank Mn deficiency is essentially a non-problem for adults eating any normal diet.

SourceNIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet NIH Office of Dietary Supplements — Manganese — Consumer Fact Sheet

Premenstrual mood and pain symptoms

Biomarker support

Mixed Evidence

A single small USDA metabolic-ward study (Penland 1993, n=10) found that very low dietary manganese (1.0 mg/day) increased premenstrual symptoms compared with adequate intake (5.6 mg/day). The trial established that severe Mn restriction matters at the extreme, not that supplementation above adequate intake helps. No subsequent trials have replicated this in free-living adults.

Effect size

Severe Mn deprivation worsened PMS symptoms; no evidence of benefit from supplementation above the AI

Time to effect

Not established

Best fit

None — this is not a supplement use case

Less likely

Adults with normal dietary Mn looking for PMS relief

Bottom line: There's no quality evidence that manganese sulfate helps PMS at any practical dose.

SourcePenland & Johnson, 1993 — American Journal of Obstetrics and Gynecology

How to take it

1. Typical dose

• 1–2 mg/day as part of a multi-mineral or bone-health formula (covers the AI of 1.8–2.3 mg/day with diet) • Stand-alone manganese sulfate is rarely indicated; 5 mg/day was used in older bone-health trials • Never exceed 11 mg/day from all sources (food + water + supplements combined)

2. Higher studied dose

5 mg/day was used in the Strause bone-mineral trial as part of a Zn+Cu+Mn trio; this is well within the UL but at the upper end of supplement doses. Doses above the UL (11 mg/day) cross into neurotoxic territory with chronic use.

3. Timing

With food. Manganese absorption is low (~5–10%) and is further reduced by phytate, fiber, iron, calcium, and magnesium — so any time of day with a meal is fine. If you're separately supplementing iron, take iron at a different meal to avoid mutual absorption interference.

4. With food

With food.

5. Split dosing

Single daily dose at typical 1–2 mg is fine. No clinical reason to split.

6. How long to try

Indefinite if covering an AI shortfall (uncommon). If you started for bone or OA combo formulas and don't notice benefit after 6 months, the manganese component is unlikely to be doing anything.

What to track

All sources of Mn intake — tally food + multivitamins + bone formulas + drinking water (especially well water) to stay under 11 mg/day

Tremor, slow movement, gait changes, or mood changes — early signs of manganese neurotoxicity, very rare but the consequence is serious

Liver health — if you develop jaundice or are diagnosed with a cholestatic condition, stop Mn supplementation

Bottom line: If it's in your multi or bone formula at 1–2 mg, no problem. Don't take it as a stand-alone supplement, don't stack multiple Mn-containing products, and check well water if you're on it.

4 commercial forms

Compare the main delivery options and what they’re best suited for.

Manganese sulfate

Common inorganic

The most widely used inorganic Mn salt in low-dose multi-mineral and bone-health supplements. Cheap, stable, and adequately absorbed for trace-mineral coverage. No clinical-outcome advantage over other Mn forms.

Absorption is low (~5–10%), tightly regulated by enteric uptake.

Manganese gluconate

Multi-mineral

Organic Mn salt commonly found in multivitamins. Often perceived as gentler than sulfate, with comparable bioavailability. Functionally interchangeable with manganese sulfate at trace doses.

Comparable to manganese sulfate.

Manganese amino-acid chelate (bisglycinate)

High-end multi

Mn bound to amino acids, marketed for higher bioavailability and gentler GI tolerance. Some absorption advantage vs inorganic salts in head-to-head studies, but the difference is small and clinically irrelevant at the 1–2 mg trace dose.

Modestly better absorbed than inorganic salts in head-to-head trials.

Manganese ascorbate

Joint formulas

Mn combined with vitamin C, common in glucosamine + chondroitin OA formulas. The combination is based on the rationale that Mn is a cofactor for glycosaminoglycan synthesis. No independent clinical effect demonstrated for the Mn component.

Standard absorption; choice driven by formulation not bioavailability.

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

generally well tolerated at ≤2 mg/day

Serious risks

Manganism (Parkinson-like neurodegeneration): chronic intake well above 11 mg/day, especially via inhalation (welders, miners) or contaminated water, causes basal ganglia accumulation with tremor, rigidity, gait disturbance, and cognitive/mood symptoms. Onset is insidious and the changes are largely irreversible.
SourceO'Neal & Zheng, 2015 — Current Environmental Health Reports (via PMC)NIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet
Childhood neurodevelopmental harm from high water manganese: a Quebec cross-sectional study found children exposed to ~34 µg/L Mn in drinking water had ~6-point lower WISC-IV IQ scores than children exposed to ~1 µg/L. Households on well water with elevated Mn should test and consider filtration.
SourceBouchard et al., 2011 — Environmental Health Perspectives
Manganese accumulates in the brain in cholestatic liver disease: biliary excretion is the only route to eliminate Mn, so PBC, PSC, cirrhosis, and any chronic cholestasis all cause Mn buildup with potential extrapyramidal symptoms. Supplemental Mn should be avoided in these conditions.
SourceNIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet

Who should avoid it

Anyone with cholestatic liver disease, cirrhosis, primary biliary cholangitis, or primary sclerosing cholangitis — impaired biliary excretion means manganese accumulates in the brain.
SourceNIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet
People with parenteral-nutrition history or current PN use — Mn is added carefully under specialist supervision because IV Mn bypasses the gut's tight absorption regulation.
SourceNIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet
Households on untested well water — drinking water Mn can far exceed supplemental doses without you realising.
SourceNIH Office of Dietary Supplements — Manganese — Consumer Fact Sheet
Welders, miners, or others with occupational manganese exposure — total body burden may already be at the threshold for manganism.
SourceO'Neal & Zheng, 2015 — Current Environmental Health Reports (via PMC)
Children — the UL is much lower than for adults (2 mg/day for ages 1–3, 3 mg/day for ages 4–8) and the developing brain is more vulnerable.
SourceNIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet

Pregnancy & breastfeeding

Pregnancy AI is 2.0 mg/day; lactation 2.6 mg/day. UL is 11 mg/day for adults 19+ and 9 mg/day for pregnant/lactating teens 14–18. Most prenatal vitamins contain 1–4 mg manganese, which is within the safe range. Don't take additional stand-alone Mn during pregnancy without obstetric guidance.

SourceNIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet

Bottom line: At ≤2 mg/day inside a multi-mineral, manganese sulfate is safe for most healthy adults. The risks (neurotoxicity, brain accumulation) come from sustained excess from supplements + water + occupational exposure, or from impaired biliary clearance.

Interactions

antipsychotics and prochlorperazineModerate

Theoretical additive extrapyramidal risk — chronic Mn excess produces parkinsonism, and dopamine-receptor blockers do the same via a different mechanism. Avoid supplemental Mn in patients on long-term antipsychotics unless prescribed.

SourceO'Neal & Zheng, 2015 — Current Environmental Health Reports (via PMC)

iron supplementsMinor

Iron and manganese share the DMT1 intestinal transporter — high iron intake competitively reduces Mn absorption and vice versa. Iron-deficient people actually absorb more manganese, which can become clinically relevant in chronic IDA.

SourceNIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet

calcium and magnesium supplements (high-dose)Minor

Large calcium or magnesium doses reduce Mn absorption. Not clinically problematic for typical multi-mineral doses but separates by 2 hours if precision matters.

SourceNIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet

tetracycline and quinolone antibioticsMinor

Manganese, like other divalent cations, chelates these antibiotics in the gut and reduces absorption. Separate by 2 hours before or 4–6 hours after the antibiotic.

SourceNIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet

Food sources

Food	Amount	%DV
Mussels, cooked	3 oz (5.8 mg)	252%
Hazelnuts, dry roasted	1 oz (1.6 mg)	70%
Pecans, dry roasted	1 oz (1.1 mg)	48%
Brown rice, cooked	½ cup (1.1 mg)	48%
Oysters, cooked	3 oz (1.0 mg)	43%
Chickpeas, cooked	½ cup (0.9 mg)	39%
Spinach, boiled	½ cup (0.8 mg)	35%
Pineapple, raw	½ cup (0.8 mg)	35%
Soybeans, cooked	½ cup (0.7 mg)	30%
Black tea, brewed	1 cup (0.5 mg)	22%
Oatmeal, instant, cooked	1 cup (0.9 mg)	39%
Tofu, raw	½ cup (0.8 mg)	35%
Whole-wheat bread	1 slice (0.6 mg)	26%
Sweet potato, baked	1 cup (0.6 mg)	26%
Kale, cooked	½ cup (0.3 mg)	13%

Mussels, cooked

Amount: 3 oz (5.8 mg)
%DV: 252%

Hazelnuts, dry roasted

Amount: 1 oz (1.6 mg)
%DV: 70%

Pecans, dry roasted

Amount: 1 oz (1.1 mg)
%DV: 48%

Brown rice, cooked

Amount: ½ cup (1.1 mg)
%DV: 48%

Oysters, cooked

Amount: 3 oz (1.0 mg)
%DV: 43%

Chickpeas, cooked

Amount: ½ cup (0.9 mg)
%DV: 39%

Spinach, boiled

Amount: ½ cup (0.8 mg)
%DV: 35%

Pineapple, raw

Amount: ½ cup (0.8 mg)
%DV: 35%

Soybeans, cooked

Amount: ½ cup (0.7 mg)
%DV: 30%

Black tea, brewed

Amount: 1 cup (0.5 mg)
%DV: 22%

Oatmeal, instant, cooked

Amount: 1 cup (0.9 mg)
%DV: 39%

Tofu, raw

Amount: ½ cup (0.8 mg)
%DV: 35%

Whole-wheat bread

Amount: 1 slice (0.6 mg)
%DV: 26%

Sweet potato, baked

Amount: 1 cup (0.6 mg)
%DV: 26%

Kale, cooked

Amount: ½ cup (0.3 mg)
%DV: 13%

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for…

1–2 mg elemental manganese per daily serving inside a multi-mineral or bone formula — that's the practical sweet spot

Form clearly listed: manganese sulfate, manganese gluconate, manganese amino-acid chelate, or manganese ascorbate (in glucosamine combos)

Third-party tested (USP, NSF, ConsumerLab)

Comprehensive nutrient panel that lets you add up your TOTAL daily Mn intake — multivitamin + bone formula + greens powder can stack

Be skeptical of…

Stand-alone manganese supplements marketed for 'energy', 'metabolism', 'antioxidant defense', or 'joint health' — there's no quality RCT evidence for any of these as a Mn-specific effect

Doses >5 mg/serving for adults — close to the UL when combined with food and water sources

Greens or 'superfood' powders that don't list Mn content per serving — tea, spinach, and many botanicals are Mn-rich

Bone-health formulas that exceed 5 mg Mn/day or that pair high Mn with high zinc + copper without specifying the doses (the 'mineral trio' bone trial used 5 mg Mn but the upper safety margin is small for long-term use)

Manganese marketed as a brain or cognitive supplement — the relationship is the opposite (excess Mn is neurotoxic)

References by claim

Trace-mineral coverage in bone or multi-mineral formulas

NIH Office of Dietary Supplements — Manganese — Health Professional Fact Sheet (2021) link

Strause et al., 1994 — Journal of Nutrition (1994) link

Safety

O'Neal & Zheng, 2015 — Current Environmental Health Reports (via PMC) (2015) link

Bouchard et al., 2011 — Environmental Health Perspectives (2011) link

Osteoarthritis (combination formulas with glucosamine/chondroitin)

Reginster et al., 2017 — Drugs (2017) link

Premenstrual mood and pain symptoms

Penland & Johnson, 1993 — American Journal of Obstetrics and Gynecology (1993) link

Correction of frank manganese deficiency

NIH Office of Dietary Supplements — Manganese — Consumer Fact Sheet (2021) link

Track Manganese sulfate with Pilora

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Evidence-based·Last reviewed May 31, 2026·Evidence current as of May 31, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.