intermittent fasting is great. In a class I'm in, we actually just went over an intermittent fasting study. specifically, there were four groups of mice.
group 1 = AL/ad libitum (eat whatever they want every day)
group 2 = IF/intermittent fasting (access to food every other day, can eat whatever they want on that day)
group 3 = LDF/limited daily feeding (ate everyday, but only 60% of the ad libitum group)
group 4 = PF/pair-fed (ate daily, but food intake was kept equal to the intermittent fasting group)
what they found:
- food intake (g/mouse/day) was nearly equal among the AL/IF/PF groups. LDF group ate less, obviously.
- bodyweight increase was nearly equal among the AL/IF/PF groups. LDF group weight stayed the same, more or less.
- serum glucose and serum insulin levels were significantly lower in the IF/LDF groups, compared to AL/PF groups. in both glucose/insulin levels, IF was actually slightly lower than the LDF group, which is surprising (at least to me).
what does this mean:
well, I noted earlier that the intermittent feeding group gained almost the same bodyweight as the other two groups (ad libitum/pair-fed). BUT, the intermittent feeding group had better insulin sensitivity, and more stable blood sugar levels. for us muscle heads, this is good, because you gain see similar increases in bodyweight, while staying LEAN!
but then again, this is just a study done on mice.
Study: Intermittent fasting dissociates beneficial effects of dietary restriction on glucose metabolism and neuronal resistance to injury from calorie intake. Anson, et al.
(No, I did not mention the neuronal resistance part of this study. but basically, IF mice group had better [significant] survival of CA3 and CA1 neurons than AL mice. Also, IF is superior to LDF in protecting brain cells from excitotoxic injury).