Manganese Citrate
Manganese Citrate is a tier 2 form of Manganese, used in 898 on-market products and providing 30.3% elemental manganese by weight.
898
on-market products
tier 2
quality tier
30.3%
elemental fraction
Basis: 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
Why this tier: Same caveat as sulfate -- no human comparative data exists; acceptable by convention only.
Source: https://ods.od.nih.gov/factsheets/Manganese-HealthProfessional/