Mineral info sheet:
Manganese, the enzyme activator

The aim of this document is to explain the basic functions of manganese, as well as indicate the how and why of our recommendations in sheep, and share some interesting facts about this trace mineral.

Basic functions

  • co-factor in many enzymes
  • role in amino acid, cholesterol, glucose, and carbohydrate metabolism
  • bone formation
  • reproduction
  • immune function
  • scavenger of reactive oxygen species

Deficiency symptoms

Deficiency symptoms include skeletal abnormalities, decreased milk production, reproduction issues such as delayed oestrus, poor conception, increased endometritis, decreased litter size, and decreased livability.

Did you know?

Chemuniqué recommendation


compared to NRC recommendation that 20 ppm/DMI is adequate for all stages

(NRC, 2007. Nutrient requirements of small ruminants: Sheep, goats, cervids, and new world camelids. National Academy Press).


Breeding sheep

Stressed lambs

Growing lambs

Inorganic Mn

Availa Mn 80

40 ppm/DMI

40 ppm/DMI

20 ppm/DMI

full mineral recommendations


Hansen et al. (2006) showed that by supplementing manganese on top of a basal level of 15.8 mg/kg (control) showed improvement of pregnancy rates in synchronised beef heifers.

Chirase & Greene (2001) fed supplemental zinc and manganese to feedlot cattle that were challenged with infectious bovine rhinotracheitis (IBR). The results showed that animals fed 50 ppm zinc-methionine and 40 ppm manganese-methionine had a lower rectal temperature change reaction to the IBR challenge, as well as improved growth performance during the challenge compared to animals supplemented with zinc-oxide and manganese-oxide at the same levels. This proves the support of manganese in immunity.

Availa® Mn 80

Reg. Number: V13330

Manganese-amino acid complex containing 8% active manganese, available in 25 kg bags. Micro-tracer testing available.

Product details



Bindari, Y.R., Shrestha, S., Shrestha, N., Gaire, T.N., 2013. Effects of nutrition on reproduction – A review. Adv. Appl. Sci. Res. 4(1):421–429.

Chirase, N.K., Greene, L.W., 2001. Dietary zinc and manganese sources administered from the fetal stage onwards affect immune response of transit stressed and virus infected offspring steer calves. Anim. Feed Sci. and Tech. 93:217–228.

Hansen, S.L., Spears, J.W., Lloyd, K.E., Whisnant, C.S., 2006. Growth, reproductive performance and manganese status of heifers fed varying concentrations of manganese. J. anim. Sci. 84(12): 3375–3380.

Henry, P.R., Ammerman, C.B., Littell, R.C., 1992. Relative bioavailability of manganese from a manganese-methionine complex and inorganic sources for ruminants. J. Dairy Sci. 75: 3473–3478.

Hidiroglou, M., 1979. Manganese in ruminant nutrition. Can. J. Anim. Sci, 59:217–236.

NRC, 2007. Nutrient Requirements of Small Ruminants: Sheep, Goats, Cervids, and New World Camelids. Washington, DC. The National Academies Press.