Manganese
Of 7,447 on-market manganese products in the January 2026 DSLD dump, the median declared dose is 2,000 elemental mcg, and 35.4% list unspecified/undisclosed form as the primary form.
Form share
Of 7,236 products with an identifiable primary form, here is the share held by each form of Manganese on the market today.
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| Form | Quality tier | n | Share |
|---|---|---|---|
| unspecified/undisclosed form | Unrated | 2,561 | 35.4% |
| Manganese Amino Acid Chelate | Unrated | 1,309 | 18.1% |
| Manganese Sulfate | Tier 2 | 1,306 | 18.0% |
| Manganese Gluconate | Tier 2 | 1,162 | 16.1% |
| Manganese Citrate | Tier 2 | 898 | 12.4% |
Form share over time
Entry-year breakdown of the top forms, 2012–2025.
Dose distribution
Deciles of declared dose per serving (elemental mcg), among 7,276 products with a disclosed amount, against the RDA of 2300 and UL of 11000.
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- 18.1% of products fall below the fairy-dust threshold (1000 mcg, 20% of the studied low dose).
- 1.1% of products don't disclose an amount because Manganese is declared inside a proprietary blend.
Where does your dose rank?
Enter a per-serving dose (elemental mcg) to see exactly how it compares to the 7,274 on-market manganese products with a disclosed amount. The chart above groups doses into deciles; this looks up the exact percentile for one number.
By dosage form
By target group
Top brands
Search interest over time
How often people search for manganese on Google, US only, the last 5 years. This is public interest, not DSLD label data — a spike here doesn't necessarily line up with anything on this page, and Google's own index (100 = that term's peak popularity in the chosen window) is relative, not an absolute search-volume count.
Or see this search directly on trends.google.com.
Forms explained
Label discloses only "Manganese" with no salt form.
Elemental fraction: 32.5% (MnSO4 x H2O, monohydrate (USP monograph commercial form; anhydrous at 0.364 also exists))
NIH ODS states no human comparative bioavailability data exist across manganese forms; treated as "acceptable by convention" (soluble reference salt used in mostly-animal research), not evidence-ranked.
Source: https://ods.od.nih.gov/factsheets/Manganese-HealthProfessional/
Elemental fraction: 30.3% (Mn3(C6H5O7)2 anhydrous (0.303); commercial hydrated powder per supplier FCC spec ranges 22-24% Mn as sold -- hydration state as labeled is unconfirmed)
Same caveat as sulfate -- no human comparative data exists; acceptable by convention only.
Source: https://ods.od.nih.gov/factsheets/Manganese-HealthProfessional/
Elemental fraction: 12.3% (Mn(C6H11O7)2, anhydrous, MW 445.26)
Same caveat -- no human comparative bioavailability data located; acceptable by convention only.
Source: https://ods.od.nih.gov/factsheets/Manganese-HealthProfessional/
Elemental fraction: 27.0% (Mn(C2H4NO2)2, pure 1:2 stoichiometric chelate, MW 203.06 (commercial raw material may be diluted, lowering actual %))
Some animal (poultry) data are said to suggest higher relative bioavailability than MnSO4 (not cited here), but NIH ODS confirms no human data exist -- not willing to assert a human-relevant tier on animal-only evidence.
Source: https://ods.od.nih.gov/factsheets/Manganese-HealthProfessional/ (no human data); the animal/poultry evidence is not cited
Reference values
- RDA (adult): 2300 elemental mcg — Adequate Intake, no RDA established: 2.3mg (men); 1.8mg (women)
- Tolerable Upper Intake Level (adult): 11000 elemental mcg — Based on a NOAEL of 11 mg/day from food, set to avoid whole-blood manganese above the normal range and risk of neurotoxicity (IOM 2001; NIH ODS)
- Studied clinical dose range: 5000–5000 mcg
- Strause L et al. 1994, J Nutr 124(7):1060-4, PMID 8027856 -- 2yr RCT (n=59) postmenopausal women; Mn 5mg/day was part of a trace-mineral combination (with Zn, Cu) that, only when further combined with calcium, significantly reduced spinal bone loss. The trace-minerals-alone arm (including this Mn dose) was not independently significant -- manganese's isolated effect cannot be determined from this trial.
- Note: NIH ODS states no human comparative bioavailability data exist across manganese forms -- every form's quality_tier below reflects "acceptable by convention" (soluble organic-acid salt), not an evidence-based ranking. The one human dosing citation found is confounded with other minerals (see studied_dose_citation).