• Vitamin A is a common feed additive and it is affected by the oxidation process.
  • Oxigard can help slow down the oxidation process and protect the nutritional value of vitamin A.
  • Vitamin A readily undergoes oxidation, the oxidation process degrades the nutritional value of vitamin A.
  • Oxigard is part of Anpario’s antioxidant range and can provide protection against oxidation.

An independent trial was conducted in the UK using a standard vitamin-mineral premix. The premix was split into six equal proportions and assigned to 1 of 6 treatments: No antioxidant (Control); Oxigard; Ethoxyquin (ETQ); Butylated hydroxytoluene (BHT); Competitor product A (Comp A); Competitor product B (Comp B). All antioxidants and competitor products were added at 250 mg/kg.

Samples were stored in ambient temperature in stage 1, and at 40oC for stage 2.

Vitamin A assays were conducted by an independent laboratory at initial manufacture and at weeks 1, 4 and 12.


Figure 1. Percentage recovery of vitamin A of premix stored at ambient temperature in Stage 1 (A) and premix stored at 40oC in Stage 2 (B).

  • The results showed that without antioxidants, the degradation of vitamin A is very severe at both ambient and high temperatures (Figure 1)
  • All products trialed were effective in slowing the rate of oxidation of Vitamin A (Figure 1).
  • Oxigard added at 250mg/kg demonstrated superior antioxidant effects over the 12 week storage period even at high temperatures (Figure 1).