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Pale pink manganese tablets beside whole pecans
DoseRoutine Manganese — Pale pink manganese tablets beside whole pecans. Original DoseRoutine photography.
mineralNot FDA-approvedOTC supplementSold in the US as an OTC dietary supplement and included as a required trace-element additive in prescription parenteral nutrition productsThe cited toxicity reviews focus specifically on hypermanganesemia risk during long-term or excessive parenteral (intravenous) dosing, not oral dietary supplementation

ManganeseBenefits, Dosage & Interactions

Manganese is an essential trace mineral, meaning that the human body requires it in small amounts for proper function. It is naturally present in some foods and available as a dietary supplement. Research on Manganese focuses on healthy aging. It is typically taken with a meal.

How much Manganese do people take?

The cited parenteral-nutrition toxicity review recommends limiting supplemental manganese to 55 mcg/day in adults on parenteral nutrition; the same review found hypermanganesemia toxicity documented across a wide range of higher doses used in commercial parenteral-nutrition products. Route reported: Oral, as a dietary mineral or multivitamin/mineral supplement component, or intravenous as a trace-element additive in parenteral nutrition in the cited toxicity literature. Frequency reported: Once daily, as a component of ongoing parenteral nutrition or oral supplementation in the cited sources. These are amounts documented in the cited studies and labels for Manganese — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.

See the full reported protocol and its sources

Researched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.

Evidence: Limited — Human observational or case data only — no randomized trials.
Evidence strengthLimited · 2/4
PreclinicalStrong human evidence

Human observational or case data only — no randomized trials.

Chemical structure of Manganese (PubChem CID 23930)
Structure via PubChem
Whole-body biological half-life
Not applicable
Typical timing
with a meal
Food rule
with food
Default unit
mg

What published protocols report

Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.

Reported amounts
The cited parenteral-nutrition toxicity review recommends limiting supplemental manganese to 55 mcg/day in adults on parenteral nutrition; the same review found hypermanganesemia toxicity documented across a wide range of higher doses used in commercial parenteral-nutrition products[1][2][3]
Route studied
Oral, as a dietary mineral or multivitamin/mineral supplement component, or intravenous as a trace-element additive in parenteral nutrition in the cited toxicity literature[1][2][3]
Frequency
Once daily, as a component of ongoing parenteral nutrition or oral supplementation in the cited sources[1][2][3]
Cycle length
The cited parenteral-nutrition review found toxicity reported after as few as 15 days of manganese-containing parenteral nutrition[1][2][3]

Reported for Manganese in the cited sources. Published ranges are not dosing advice.

References & evidence

Documents the Manganese entry is written from. Each number matches an inline marker above.

  1. [1]ESPEN micronutrient guidelineBerger MM, Shenkin A, Schweinlin A, Amrein K, Augsburger M, Biesalski HK, Bischoff SC, Casaer MP, Gundogan K, Lepp HL, de Man AME, Muscogiuri G, Pietka M, Pironi L, Rezzi S, Cuerda C · Clinical Nutrition · 2022 · Peer-reviewed · PMID 35365361
  2. [2]Manganese Toxicity Associated With Total Parenteral Nutrition: A ReviewReinert JP, Forbes LD · Journal of Pharmacy Technology · 2021 · Peer-reviewed · PMID 34753157
  3. [3]Evaluating the risk of manganese-induced neurotoxicity of parenteral nutrition: review of the current literatureMartins AC Jr, Ruella Oliveira S, Barbosa F Jr, Tinkov AA, V Skalny A, Santamaria A, Lee E, Bowman AB, Aschner M · Expert Opinion on Drug Metabolism & Toxicology · 2021 · Peer-reviewed · PMID 33620266

References & Evidence

Sources on this page that document Manganese dosing, timing and safety.

  1. [1]National Center for Biotechnology Information View source

Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.

What is Manganese studied for?

Longevity

What is Manganese?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.

Manganese is an essential trace mineral, meaning that the human body requires it in small amounts for proper function. It is naturally present in some foods and available as a dietary supplement. Manganese plays a vital role in numerous physiological processes, including bone development, carbohydrate and fat metabolism, and antioxidant defense. It acts as a cofactor for several enzymes, most notably superoxide dismutase (SOD), which is crucial for protecting cells from oxidative damage. The body maintains tight control over manganese levels, absorbing only a fraction of dietary intake and primarily excreting excess through bile. Deficiencies are rare in healthy individuals consuming a balanced diet, as many foods contain adequate amounts of this mineral. Conversely, excessive intake, particularly through certain occupational exposures or contaminated water sources, can lead to adverse neurological effects.

What does the research say about Manganese?

Tap a section to expand.

Manganese functions primarily as a cofactor for a variety of enzymes. Its most well-understood role is in activating manganese superoxide dismutase (MnSOD), an enzyme critical for neutralizing harmful free radicals within the mitochondria, protecting cells from oxidative stress. Beyond its antioxidant function, manganese is involved in the metabolism of carbohydrates, amino acids, and cholesterol. It is an integral component of enzymes like arginase, which is involved in the urea cycle, and pyruvate carboxylase, essential for glucose metabolism. Manganese also plays a role in bone formation, acting as a cofactor for glycosyltransferases, enzymes required for proteoglycan synthesis. Furthermore, it is implicated in immune function and reproductive processes, though these roles are less extensively characterized than its metabolic and antioxidant functions. (NIH ODS) (PubChem)

Source for this section: Sources for How does Manganese work?: Jumps to this entry in the sources and references list at the end of the page.

Manganese is essential for several bodily functions: * **Antioxidant Defense:** As a component of MnSOD, manganese helps protect cells from damage caused by free radicals, contributing to overall cellular health. (NIH ODS) * **Bone Health:** It is involved in bone development and maintenance, including the synthesis of connective tissue. (NIH ODS) * **Metabolism:** Manganese plays a key role in the metabolism of carbohydrates, amino acids, and cholesterol, aiding in energy production and nutrient utilization. (NIH ODS) * **Wound Healing:** It contributes to various processes involved in wound repair. (NIH ODS) Adequate manganese intake is generally achieved through a balanced diet, and widespread deficiencies are uncommon. The benefits observed are primarily due to its essential role in maintaining normal physiological processes.

Evidence for the necessity of manganese is well-established, primarily through its identification as an essential trace element required for the proper functioning of numerous enzymes. Its role as a critical component of manganese superoxide dismutase (MnSOD) is supported by extensive biochemical and physiological research demonstrating its importance in antioxidant defense. Studies have also elucidated its involvement in metabolic pathways, including carbohydrate and lipid metabolism, through its cofactor activity for enzymes such as pyruvate carboxylase and arginase. While manganese is recognized as essential, research on its specific therapeutic benefits from supplementation in individuals without a deficiency is less extensive; the focus is primarily on preventing and treating deficiency states, which are rare. Data from the NIH Office of Dietary Supplements provides comprehensive summaries of its roles and requirements. (NIH ODS)

While essential, excessive manganese intake can lead to adverse effects, particularly from occupational exposure or contaminated water, rather than typical dietary intake. Potential side effects include: * **Neurological Symptoms:** High levels can cause a condition known as manganism, characterized by neurological symptoms resembling Parkinson's disease, including tremors, difficulty walking, and cognitive impairment. (NIH ODS) * **Psychological Effects:** Mood changes, irritability, and hallucinations have been reported in cases of chronic overexposure. (NIH ODS) * **Liver Damage:** In some instances of chronic excessive intake, liver damage has been noted. (PubChem) Dietary manganese from food sources is generally considered safe, and adverse effects from supplements are rare when taken within recommended limits. Manganism is primarily associated with inhalation exposure to manganese dust in occupational settings (e.g., mining, welding) or consuming water with very high manganese concentrations. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.

Individuals with certain pre-existing conditions, particularly liver disease, may be at a higher risk of manganese accumulation and toxicity because the liver is the primary organ for manganese excretion. Therefore, those with compromised liver function should exercise caution and consult a healthcare professional regarding manganese intake. Infants and young children may also be more susceptible to the effects of excess manganese. Occupational exposure to high levels of airborne manganese dust is a significant concern for neurological toxicity. Care should be taken to avoid exceeding the Tolerable Upper Intake Level (UL) established by health authorities. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.

There are no absolute contraindications to manganese intake at normal dietary levels. However, individuals with severe liver disease should be cautious with manganese supplementation, as impaired liver function can lead to increased manganese accumulation and potential toxicity. Specific recommendations or contraindications for manganese supplements would be provided by a healthcare professional based on individual health status and existing medical conditions. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.

High doses of manganese may interfere with the absorption of other minerals, such as iron and zinc, and vice versa. Conversely, iron deficiency might enhance manganese absorption. While these interactions are generally not significant at typical dietary intake levels, individuals taking high-dose mineral supplements should be aware of potential competitive absorption mechanisms. Always consult a healthcare provider regarding potential interactions, especially when taking mineral supplements. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.

Manganese is typically consumed with a meal. This approach can help improve its absorption and reduce potential gastrointestinal upset that can sometimes occur when taking mineral supplements on an empty stomach. Always follow specific product instructions or the guidance of a healthcare professional. For supplements, the dosing should be user-directed and set by a licensed clinician.

Source for this section: Sources for When should you take Manganese?: Jumps to this entry in the sources and references list at the end of the page.

Put it into practice

Reading about Manganese is the first step — DoseRoutine helps you act on it. These free tools turn what you just learned into a routine.

What interacts with Manganese?

No interaction rules currently on file for this compound in DoseRoutine.

Frequently asked questions about Manganese

Manganese is a key cofactor for various enzymes, most notably superoxide dismutase (SOD), which is crucial for antioxidant defense. It also plays roles in metabolism, bone development, and wound healing. (NIH ODS)

Yes, manganese is present in many common foods, such as nuts, legumes, whole grains, leafy green vegetables, and tea. Deficiencies are rare in individuals consuming a balanced diet. (NIH ODS)

Excess manganese, particularly from occupational exposure or contaminated water, can lead to neurological symptoms similar to Parkinson's disease, known as manganism, and in some cases, liver damage. (NIH ODS)

High doses of manganese can potentially interfere with the absorption of other minerals like iron and zinc. It's always best to consult a healthcare professional about potential interactions when taking supplements. (NIH ODS)

Manganese is typically taken with a meal. Published protocols usually have it taken with food. Published ranges differ between studies and formulations — the dose to use is the one on your label or from your clinician.

There is no single answer for Manganese plus TRT. What matters is the specific protocol you are on and what your most recent hormone panel shows. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions

Pairing Manganese with peptides has to be assessed one peptide at a time, because GLP-1 agonists, secretagogues, healing peptides and melanocortins do not share an interaction profile. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.

Published frequency for Manganese varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken with a meal. Most protocols have it taken with food. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps

The effect of a missed dose of Manganese depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.

For Manganese the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.

The cited parenteral-nutrition toxicity review recommends limiting supplemental manganese to 55 mcg/day in adults on parenteral nutrition; the same review found hypermanganesemia toxicity documented across a wide range of higher doses used in commercial parenteral-nutrition products. Route reported: Oral, as a dietary mineral or multivitamin/mineral supplement component, or intravenous as a trace-element additive in parenteral nutrition in the cited toxicity literature. Frequency reported: Once daily, as a component of ongoing parenteral nutrition or oral supplementation in the cited sources. These are amounts documented in the cited studies and labels for Manganese — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.

Which studies looked at Manganese?

Peer-reviewed research indexed in PubMed. Each entry links to the original record.

  1. 1.Manganese(opens PubMed in a new tab)J Toxicol Clin Toxicol · 1999 · PMID 10382563 · https://pubmed.ncbi.nlm.nih.gov/10382563/

Sources cited on this page

Specific documents referenced by the numbered markers above. Each number matches the marker in the text.

  1. PubChem CID 23930(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/23930

Verify at

Publisher search links for Manganese. These are places to check the information — they are not citations, so they are not numbered.

DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.

What is the short answer on Manganese?

Plain-text summary, safe to quote verbatim:

Manganese is an essential trace mineral, meaning that the human body requires it in small amounts for proper function. It is naturally present in some foods and available as a dietary supplement. Research on Manganese focuses on healthy aging. It is typically taken with a meal.
Source: DoseRoutine — https://doseroutine.com/library/manganese

Manganese cheat sheet

DoseRoutine cheat sheet · Mineral

Manganese

Manganese is an essential trace mineral, meaning that the human body requires it in small amounts for proper function. It is naturally present in some foods and available as a dietary supplement.

Evidence

Limited

Human observational or case data only — no randomized trials.

Studied range

The cited parenteral-nutrition toxicity review recommends limiting supplemental manganese to 55 mcg/day in adults on parenteral nutrition; the same review found hypermanganesemia toxicity documented across a wide range of higher doses used in commercial parenteral-nutrition products

Route

Oral, as a dietary mineral or multivitamin/mineral supplement component, or intravenous as a trace-element additive in parenteral nutrition in the cited toxicity literature

Frequency studied

Once daily, as a component of ongoing parenteral nutrition or oral supplementation in the cited sources

Timing

with a meal

With food

with food

Not FDA-approvedOTC supplementSold in the US as an OTC dietary supplement and included as a required trace-element additive in prescription parenteral nutrition productsThe cited toxicity reviews focus specifically on hypermanganesemia risk during long-term or excessive parenteral (intravenous) dosing, not oral dietary supplementationLongevity

Key references

  1. ESPEN micronutrient guideline (2022)
  2. Manganese Toxicity Associated With Total Parenteral Nutrition: A Review (2021)
  3. Evaluating the risk of manganese-induced neurotoxicity of parenteral nutrition: review of the current literature (2021)

Studied ranges, not dosing advice. Not medical advice — talk to a clinician. doseroutine.com/library/manganese

Cite this page

Using this in an article, AI answer, or research note? Please attribute:

DoseRoutine. (2026). Manganese — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/manganese
Canonical URL

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