Prolonged exposure causes neurologic symptoms resembling those of parkinsonism or Wilson disease and may also alter cardiovascular function. Manganese neurotoxicity: behavioral, pathological, and biochemical effects following various routes of exposure. 7th ed. Absorption of manganese from a meal decreases as the meal's iron content increases (7). 6, D and E). Median intake is between 1.6 and 2.3 mg/day; absorption is 5 to 10%. Manganese deficiency has been observed in a number of animal species. The main toxic effects attributable to this metal are extra-pyramidal side-effects that closely resemble symptoms of Parkinson syndrome. 2007;12:332-343.  (PubMed). Additionally, a study of functional manganese status found the activity of the antioxidant enzyme, MnSOD, was lower in the white blood cells of diabetics than in non-diabetics (27). N2 - Previous studies have shown that manganese (Mn) deficiency in rats results in reduced activity of manganese superoxide dismutase (MnSOD) and increased levels of mitochondrial lipid peroxidation. USA.gov. 2012 Aug;33(4):881-6. doi: 10.1016/j.neuro.2011.12.010. However, a more recent study in 257 type 2 diabetics and 166 non-diabetic controls found lower blood levels of manganese in the diabetic patients (26). A dose-response experiment with different Mn concentrations showed that OsYSL6 expression was not induced by either Mn excess or deficiency in both the roots and shoots (Fig. eCollection 2020 Sep. 2020 Apr 22;10(4):727. doi: 10.3390/ani10040727. 1941;18:145-169. J Trace Elem Exp Med. Manganese in health and disease. AIs for children are less. Because of the role of manganese as a cofactor for several enzymes, low intakes might increase the risk of illness related to bone health and diabetes sit is involved in glucose, carbohydrate, and lipid … Manganese and calcium absorption and balance in young women fed diets with varying amounts of manganese and calcium. 2.  Nielsen FH. Manganese Deficiency Overall, manganese deficiency is not common, and there is more concern for toxicity related to manganese overexposure (see manganese toxicity). Environ Health Perspect. Low dietary manganese or low levels of manganese in blood or tissue have been associated with several chronic diseases. 1999;20(2-3):151-157.  (PubMed), 41.  Bolte S, Normandin L, Kennedy G, Zayed J. Methylcyclopentadienyl manganese tricarbonyl (MMT) in petrol: the toxicological issues. What about glyphosate-induced manganese deficiency? 9th ed. In: Ziegler EE, Filer LJ, eds. Curr Opin Clin Nutr Metab Care. Ann Acad Med Singapore. Oregon State University, Updated in June 2007 by: Biol Trace Elem Res. Infants receiving manganese-containing TPN can be exposed to manganese concentrations about 100-fold higher than breast-fed infants (31). ], which are not documented, were determined to provide guideline values for estimating the Mn status from deficiency through toxicity.Soybean (‘Bragg’) was grown in Hoagland nutrient solution with 14 Mn levels from 0 to 50,000 μg/liter.The plants were …  (PubMed), 24.  el-Yazigi A, Hannan N, Raines DA. Characteristics of this disease are described as Parkinson-like symptoms. 28.  Walter RM, Aoki TT, Keen CL. Manganese in drinking water may be more bioavailable than manganese in food. 5.  Wedler FC. However, none of the studies measured dietary manganese, so total manganese intake in these cases is unknown. Diabetes. Manganese is available as a stand-alone supplement or in combination products (34). A single case of manganese toxicity was reported in a person who took large amounts of mineral supplements for years (49), while another case was reported as a result of a person taking a Chinese herbal supplement (36). Manganese concentrations in drinking water range from 1 to 100 μg/L, but most sources contain less than 10 μg/L (32). Rev Environ Health. 2008;11(3):289-296.  (PubMed), 53.  Wright RO, Amarasiriwardena C, Woolf AD, Jim R, Bellinger DC. Manganese (Mn) plays an important role in a number of physiologic processes as a constituent of multiple enzymes and an activator of other enzymes (2). In the US, the EPA recommends 0.05 mg/L as the maximum allowable manganese concentration in drinking water (33). 18.  Friedman BJ, Freeland-Graves JH, Bales CW, et al. Dry matter yield was affected similarly by Fe deficiency and Mn toxicity. Present Knowledge in Nutrition. MMT is a manganese-containing compound used in gasoline as an anti-knock additive. 2008;37(7):564-567.  (PubMed), 22.  Strause L, Saltman P, Smith KT, Bracker M, Andon MB. Signs of manganese deficiency include impaired growth, impaired reproductive function, skeletal abnormalities, impaired glucose tolerance, and altered carbohydrate and lipid metabolism. Manganese: pharmacokinetics and molecular mechanisms of brain uptake. Effects of manganese deficiency on the microstructure of proximal tibia and OPG/RANKL gene expression in chicks. Intestinal absorption of manganese is increased during iron deficiency, and increased iron stores (ferritin levels) are associated with decreased manganese absorption (12). A manganese level of 20 to 40 ppm (mg kg – ) in plant tissue is sufficient for most plants. 16.  Johnson PE, Lykken GI. 2000;108 Suppl 3:429-432.  (PubMed). Ann NY Acad Sci. The Linus Pauling Institute Micronutrient Information Center provides scientific information on the health aspects of dietary factors and supplements, food, and beverages for the general public. The expression did not respond to the deficiency of Zn, Fe, Mn, and Cu in both the roots and shoots (Fig. Neurotoxicology. The CDL and CTL defined as the elemental concentration in the tissue associated with a 10% reduction in growth due to a deficiency or toxicity, respectively, were … Diabetes Res. 2002 Jul-Sep;17(3):189-217. doi: 10.1515/reveh.2002.17.3.189. PDR for Nutritional Supplements. Liability for individual actions or omissions based upon the contents of this site is expressly disclaimed. 1991;4:73-79.  (PubMed), 54.  Das A, Jr., Hammad TA. NLM Efficacy of a combination of FCHG49 glucosamine hydrochloride, TRH122 low molecular weight sodium chondroitin sulfate and manganese ascorbate in the management of knee osteoarthritis. Additionally, an individual's iron status can affect manganese bioavailability. Pathophysiology of manganese-associated neurotoxicity. Neuropsychological correlates of hair arsenic, manganese, and cadmium levels in school-age children residing near a hazardous waste site. 1991;15(3):333-340.  (PubMed), 38.  Han J, Lee JS, Choi D, et al. Manganese in health and disease. Keen CL, Zidenberg-Cherr S. Manganese. Environmental Protection Agency, [Web page]. 3.  Leach RM, Harris ED. Int J Environ Res Public Health. No adverse effects were reported during either study, and blood manganese levels were not measured.  (PubMed). Manganese is a mineral element that is both nutritionally essential and potentially toxic. 2005;26(4-5):353-362. Function. Magnesium-containing antacids and laxatives and the antibiotic medication, tetracycline, may decrease the absorption of manganese if taken together with manganese-containing foods or supplements (34). Manganese is an immobile nutrient and, therefore, deficiency symptoms show up on younger leaves first. Am J Clin Nutr. Neurotoxicology. Biochemical and nutritional role of manganese: an overview. Linus Pauling Institute Sex affects manganese absorption and retention by humans from a diet adequate in manganese. 21.  Odabasi E, Turan M, Aydin A, Akay C, Kutlu M. Magnesium, zinc, copper, manganese, and selenium levels in postmenopausal women with osteoporosis. In: Klimis-Tavantzis DL, ed. Environ Health Perspect. Racette BA, Aschner M, Guilarte TR, Dydak U, Criswell SR, Zheng W. Neurotoxicology. In one study, whole blood manganese levels did not differ significantly between 57 diabetics and 28 non-diabetic controls (23). Since overt manganese deficiency has not been documented in humans eating natural diets, the FNB based the AI on average dietary intakes of manganese determined by the Total Diet Study — an annual survey of the mineral content of representative American diets (4).  (PubMed), 46.  Ljung K, Vahter M. Time to re-evaluate the guideline value for manganese in drinking water? Manganese deficiency has been observed in a number of animal species.  (PubMed), 55.  Leffler CT, Philippi AF, Leffler SG, Mosure JC, Kim PD. Iron deficiency increases manganese absorption and can therefore exacerbate symptoms of manganese toxicity . Relatively high levels of manganese ascorbate may be found in a bone/joint health product containing chondroitin sulfate and glucosamine hydrochloride (see Safety). People eating vegetarian diets and Western-type diets may have manganese intakes as high as 10.9 mg/day (4). The dose of elemental manganese supplied by the supplements was 30 mg/day for eight weeks in one study (55) and 40 mg/day for six months in the other (54). Although the specific mechanisms for manganese absorption and transport have not been determined, some evidence suggests that iron and manganese can share common absorption and transport pathways (10). Here the manganese competes with magnesium and iron for absorption and also hinders calcium translocation in the shoot apex of the plant. 2003;94:193-201.  (PubMed), 26.  Kazi TG, Afridi HI, Kazi N, et al. Boca Raton: CRC Press, Inc; 1994:193-205. Although manganese insufficiency is not currently thought to cause the diseases discussed below, more research may be warranted to determine whether suboptimal manganese nutritional status contributes to certain disease processes. Another study associated high levels of manganese in tap water with hyperactive behavioral disorders in children (48). Dietary Diversity Is Associated With Memory Status in Chinese Adults: A Prospective Study. Pyruvate carboxylase, a manganese-containing enzyme, and phosphoenolpyruvate carboxykinase (PEPCK), a manganese-activated enzyme, are critical in gluconeogenesis — the production of glucose from non-carbohydrate precursors. Arginase, another manganese-containing enzyme, is required by the liver for the urea cycle, a process that detoxifies ammonia generated during amino acid metabolism (3). Loss-of-function mutations in SLC30A10, a cell-surface-localized manganese efflux transporter, cause a heritable manganese metabolism disorder resulting in elevated manganese levels and parkinsonian-like movement deficits. (See also Overview of Mineral Deficiency and Toxicity.) The requirement for manganese is not known to be higher for older adults. You may hyperlink to this website but must include the following statement: "This link leads to a website provided by the Linus Pauling Institute at Oregon State University.  [Your name] is not affiliated or endorsed by the Linus Pauling Institute or Oregon State University. *Source of intake should be from food and formula only. 2006;27(2):210-216. Neurotoxicology. Baltimore: Williams & Wilkins; 1999:283-303. Stahlman Professor of Neuroscience In: O'Dell BL, Sunde RA, eds. Manganese is a component of some enzymes and stimulates the development and activity of other enzymes. Kawamura R. Intoxication by manganese in well water. 1987;11(3):307-327.  (PubMed), 40.  Zayed J, Thibault C, Gareau L, Kennedy G. Airborne manganese particulates and methylcyclopentadienyl manganese tricarbonyl (MMT) at selected outdoor sites in Montreal. A genetic disorder known as prolidase deficiency results in abnormal wound healing among other problems, and is characterized by abnormal manganese metabolism (7). The rate of Fe translocated from roots to shoots in the 25.0 μM Mn (toxic) treatment was similar to the Fe‐deficient treatment. However, the presence of other trace elements in the supplement makes it impossible to determine whether manganese supplementation was the beneficial agent for maintaining bone mineral density. Urinary excretion of chromium, copper, and manganese in diabetes mellitus and associated disorders. Neurotox Res. Median intake is between 1.6 and 2.3 mg/day; absorption is 5 to 10%. 2008;122(1):1-18. Manganese deficiency results in glucose intolerance similar to diabetes mellitus in some animal species, but studies examining the manganese status of diabetic humans have generated mixed results. Wound healing is a complex process that requires increased production of collagen. Kondakis XG, Makris N, Leotsinidis M, Prinou M, Papapetropoulos T. Possible health effects of high manganese concentration in drinking water. Boca Raton: CRC Press, Inc; 1994;59-86. Am J Clin Nutr. In: Klimis-Tavantzis DL, ed. Although teas are rich sources of manganese, the tannins present in tea may moderately reduce the absorption of manganese (15). Given that both Fe and Mn are abundant in the earth crust, nutritional deficiency is rare. 1987;117(1):133-143.  (PubMed). Glycosaminoglycan synthesis, which requires manganese-activated glycosyltransferases, may also play an important role in wound healing (9). 2000;52(2):149-155.  (PubMed). Boca Raton: CRC Press, Inc.; 1994. Manganese toxicity is more often a risk with people who mine and refine ore, but even low-level occupational exposure and contaminated foods (eg, infant formula) or water may be harmful. Professor of Pharmacology A number of manganese-activated enzymes play important roles in the metabolism of carbohydrates, amino acids, and cholesterol (4). Manganese neurotoxicity: cellular effects and blood-brain barrier transport. 1999;70(1):37-43.  (PubMed), 13.  Finley JW, Johnson PE, Johnson LK. Prolonged exposure causes neurologic symptoms resembling those of parkinsonism or Wilson disease and may also alter cardiovascular function. In 1995, a US court decision made MMT available for widespread use in unleaded gasoline (35). Boca Raton: CRC Press, Inc; 1994:39-58. Chair, Department of Nutrition  |  However, liver disease is more common in older adults and may increase the risk of manganese toxicity by decreasing the elimination of manganese from the body (see Toxicity). 6, B and C). Linus Pauling Institute Because mitochondria consume over 90% of the oxygen used by cells, they are especially vulnerable to oxidative stress. 2004;1012:115-128. Severe neurological symptoms were reported in 25 people who drank water contaminated with manganese, and probably other contaminants, from dry cell batteries for two to three months (43). Consequently, the abundance of manganese in plants induces a deficiency of iron, copper, and calcium. Manganese in health and disease. Glucosamine, chondroitin, and manganese ascorbate for degenerative joint disease of the knee or low back: a randomized, double-blind, placebo-controlled pilot study. Manganese concentrations in breast milk, cow-based formula, and soy-based formula range from 3 to 10 micrograms/liter (μg/L), 30 to 50 μg/L, and 200 to 300 μg/L, respectively. 2007:20–22. Clipboard, Search History, and several other advanced features are temporarily unavailable. Neurosci Biobehav Rev. Washington D.C.: ILSI Press; 1996:334-343. 2020 Mar 26;17(7):2231. doi: 10.3390/ijerph17072231. Jane Higdon, Ph.D. Boca Raton: CRC Press, Inc.; 1994:1-37. 15. Kies C. Bioavailability of manganese. Front Biosci. Young men who were fed a low-manganese diet developed decreased serum cholesterol levels and a transient skin rash (18). Because of the potential for toxicity and the lack of information regarding benefit, manganese supplementation beyond 100% of the DV (2 mg/day) is not recommended. Manganese neurotoxicity: a review of clinical features, imaging and pathology. Yet, a more recent study in postmenopausal women with and without osteoporosis did not find any differences in plasma levels of manganese (21). 1992;5:100-101 (abstract). Overall, manganese deficiency is not common, and there is more concern for toxicity related to manganese overexposure (see Safety). Ultratrace minerals. You have similar alarm clocks inside your body called cofactors, which are molecules that help enzymes get to work. MnSOD catalyzes the conversion of superoxide radicals to hydrogen peroxide, which can be reduced to water by other antioxidant enzymes (3).  (PubMed), 45. Vieregge P, Heinzow B, Korf G, Teichert HM, Schleifenbaum P, Mosinger HU. J Trace Elem Exp Med. Potential for stem cell treatment in manganism. Manganese (Mn) is an essential trace metal, however exposure to high Mn levels can result in neurodegenerative changes resembling Parkinson´s disease (PD). Manganese. Gray E.B. The similarities between the two disorders can be partially explained by the fact that the basal ganglia accumulate most of the excess manganese compared with other brain regions in manganism, and dysfunction in the basal ganglia is also the etiology of Parkinson's disease. The superoxide radical is one of the reactive oxygen species produced in mitochondria during ATP synthesis. The manganese Adequate Intake for a 44 year old human male is 2.3 mg per day, for a woman of the same age 1.8 mg, with 11 mg estimated as the tolerable upper limit for daily intake to avoid toxicity. The mechanisms by which increased manganese levels can cause neuronal dysfunction and death are yet to be elucidated. 2006;25(3):147-154.  (PubMed). Oregon State University, Updated in March 2010 by: Neither study compared the treatment containing manganese ascorbate to a treatment containing glucosamine hydrochloride and chondroitin sulfate without manganese ascorbate, so it is impossible to determine whether the supplement would have resulted in the same benefit without high doses of manganese. This syndrome, often called manganism, is sometimes preceded by psychiatric symptoms, such as irritability, aggressiveness, and even hallucinations (36, 37). 2004;67(6):459-467.  (PubMed), 42.  Aschner M. Manganese: brain transport and emerging research needs. Health Risk Assessment and Source Apportionment of Mercury, Lead, Cadmium, Selenium, and Manganese in Japanese Women: An Adjunct Study to the Japan Environment and Children's Study. Neonates are especially vulnerable to manganese-related neurotoxicity (51). Ma C, Iwai-Shimada M, Tatsuta N, Nakai K, Isobe T, Takagi M, Nishihama Y, Nakayama SF. The brain is particularly susceptible to this excess manganese, and accumulation there can cause a neurodegenerative disorder known as manganism. 50.  Dobson AW, Erikson KM, Aschner M. Manganese neurotoxicity. The information on dietary factors and supplements, food, and beverages contained on this website does not cover all possible uses, actions, precautions, side effects, and interactions.  |  [49] The essential minimum intake is unknown since manganese deficiency is so rare. However, bioavailability of manganese from breast milk is higher than from infant formulas, and manganese deficiencies in breast-fed infants or toxicities in formula-fed infants have not been reported (31). email: lpi@oregonstate.edu, Healthcare Professional Continuing Education. 43. Nutritional aspects of manganese from experimental studies. Manganese superoxide dismutase (MnSOD) is the principal antioxidant enzyme in the mitochondria. Manganese Toxicity In domestic animals, the major reported lesion associated with chronic manganese toxicity is iron deficiency, resulting from an inhibitory effect of manganese on iron absorption. Manganese toxicity may result in multiple neurologic problems and is a well-recognized health hazard for people who inhale manganese dust, such as welders and smelters (1, 4). Zhang J, Zhao A, Wu W, Yang C, Ren Z, Wang M, Wang P, Zhang Y. Front Aging Neurosci. 49.  Keen C, Zidenberg-Cherr S. Manganese toxicity in humans and experimental animals. Corvallis, Oregon 97331, phone: 541-737-5075 | fax: 541-737-5077 1992;55(3):747-752. Vet Res Commun. Med Sci Res. Kisasato Archives of Experimental Medicine. Manganese toxicity also frequently causes chlorosis (pale or yellowcolour), most severe on the younger leaves, due to an induced iron deficiency. J Nutr. Supplemental magnesium (200 mg/day) has been shown to slightly decrease manganese bioavailability in healthy adults, either by decreasing manganese absorption or by increasing its excretion (15). For instance, a cross-sectional study in 142 10-year old children, who were exposed to a mean manganese water concentration of 0.8 mg/L, found that children exposed to higher manganese levels had significantly lower scores on three tests of intellectual function (47).  (PubMed), 52.  Hardy IJ, Gillanders L, Hardy G. Is manganese an essential supplement for parenteral nutrition? 7. 2020 Dec 15;21(24):9566. doi: 10.3390/ijms21249566. New York: Marcel Dekker, Inc; 1997:335-355. So it is apparent that toxicity and deficiency are closely interlinked. Manganese (II) induces chemical hypoxia by inhibiting HIF-prolyl hydroxylase: implication in manganese-induced pulmonary inflammation. The role of manganese in wound healing. 8.  Muszynska A, Palka J, Gorodkiewicz E. The mechanism of daunorubicin-induced inhibition of prolidase activity in human skin fibroblasts and its implication to impaired collagen biosynthesis. Information on Mn´s effects on endothelial cells of the blood-brain barrier (BBB) is lacking. 1999;20(2-3):213-223.  (PubMed). Manganese toxicity resulting from foods alone has not been reported in humans, even though certain vegetarian diets could provide up to 20 mg/day of manganese (4, 32). 1991;18(3):129-134.  (PubMed), 25.  Ekin S, Mert N, Gunduz H, Meral I. Serum sialic acid levels and selected mineral status in patients with type 2 diabetes mellitus. Am J Clin Nutr. Environ Health Perspect. 30.  US Department of Agriculture, Agricultural Research Service. Additionally, environmental or occupational inhalation of manganese can cause an inflammatory response in the lungs (38). Manganese balance and clinical observations in young men fed a manganese-deficient diet. Manganese deficiency has not been conclusively documented, although one experimental case in a volunteer resulted in transient dermatitis, hypocholesterolemia, and increased alkaline phosphatase levels. In: Klimis-Tavantzis DL, ed. Manganese is also quite toxic when ingested in large amounts, such as the inhalation of Mn-laden dust by miners. A more recent Canadian study found higher concentrations of respirable manganese in an urban versus a rural area, but average concentrations in both areas were below the safe level set by the US EPA (41). Manganese deficiency results in abnormal skeletal development in a number of animal species. Copper, chromium, manganese, iron, nickel, and zinc levels in biological samples of diabetes mellitus patients. A study in Montreal, where MMT had been used for more than 10 years, found airborne manganese levels to be similar to those in areas where MMT was not used (40). In the brain, the manganese-activated enzyme, glutamine synthetase, converts the amino acid glutamate to glutamine. Read fertilizer labels carefully to determine if micronutrients (manganese, iron, copper, zinc, molybdenum, etc.)