Table 4. Seasonal changes of vitamin E and A concentrations on piglets serum

Piglet serum Winter SEM Summer SEM p-value
Vitamin A (µg/mL)
 Day 01) 0.08 0.001 0.10 0.001 0.01
 Day 21 0.20 0.001 0.19 0.001 0.75
Vitamin E (µg/mL)
 Day 01) 0.69 0.11 1.12 0.12 0.01
 Day 21 2.61 0.30 3.25 0.32 0.17
Piglets serum was collected 12h after the collection of colostrum samples.
SEM, standard error of the mean.