Effect of food restriction on 24-h serum and pineal melatonin content in male rats

Food restriction (50%) effects on the 24-h rhythm of serum and pineal melatonin (MT) were studied in 260-300 g male Wistar rats under a lighting regimen of 14 h light and 10 h dark. Body weight, testicular weight, accessory organ weights, serum LH, serum testosterone, and 24-h rhythms of serum and pineal MT were determined. One week of food restriction caused a decrease in body weight (18%), accessory organ weights (18%), and serum LH (50%), …