Study identifies multi-organ response to seven days without food
www.sciencedaily.com
New findings reveal that the body undergoes significant, systematic changes across multiple organs during prolonged periods of fasting. The results demonstrate evidence of health benefits beyond weight loss, but also show that any potentially health-altering changes appear to occur only after three days without food.

Fasting for a week:

  • Causes significant changes in protein levels across various organs.
  • May have health benefits beyond weight loss, but only after 3 days.
  • Switches energy source from glucose to fat after 2-3 days.
  • Average weight loss of 5.7 kg (fat and muscle), with most fat loss sustained after 3 days of eating.

Implications:

  • Provides insights into the molecular basis of fasting’s health effects.
  • Paves the way for developing alternative treatments based on fasting benefits.
  • Confirms historical use of fasting for specific health conditions.
  • Dojan@lemmy.world
    82·
    8 months ago

    No no, they are saying that you’ll lose a bunch of water weight. As far as I know you generally regain that quite easily once you start eating again.

    Personally I subscribe to the idea of calories in < calories out. Sustainable weight loss requires good habits and a healthy relationship with food.

    • constantokra@lemmy.one
      81·
      8 months ago

      There’s a lot of data that shows that restricting calories causes your metabolism to lower. Fasting basically causes your body to shift to using fat stores, so it still does have adequate fuel # and your metabolism doesn’t fall the same way. It also changes your insulin response, and insulin resistance is one of the reasons you put on weight to begin with. If you’re interested, Dr. Jason Fung has written a couple good books on.the subject. He’s also put out a bunch of YouTube videos on it.

      I’ve beef doing intermittent fasting for a while, and you do drop a good amount of weight very quickly. Most of it does stay off, but the idea is that you continue to fast periodically for weight management, typically limiting food intake to only a few hours daily.

      • PrincessLeiasCat@sh.itjust.works
        3·
        8 months ago

        Causes your metabolism to lower while you’re restricting calories, or potentially for good?

        I ask because I ended up doing this pretty drastically for a time (long story, not proud of it) but once I started eating “normally” again, could my metabolism speed up again?

        • constantokra@lemmy.one
          1·
          8 months ago

          I’m certainly not an expert, but my understanding is that the effect from restricting calories can last longer than the restriction. But it can increase again, and there are many other factors that affect the metabolism. Just like slowing if you don’t have many calories it can increase if you have more.

        • Fedizen@lemmy.world
          1·
          8 months ago

          My understanding is that severe shifts in calorie intake vs output can lead to lasting metabolic changes. I think the main example people point to is that all “biggest loser” contestants failed to keep their weight down even when they maintained their diets and exercise for a long period.