I have been following a Keto WOE for 4-5 weeks now with fasting including 3-6 days fasts. This last time I was aiming for 7 days and fell short at 5 but immediately started another fast after one meal. A keto friend said that I should keep 2-3 days between fasts as to not wreck my metabolism. This is a great concern of mine as a broken metabolism from highly restricted calories was my problem before keto. I have searched google for information on strategies for best on/off fast routine and can’t find a difinitive answer.
I have read in here about listening to your body, but I don’t know if it would tell me that I’m ruining my metabolism lol. I have energy and short bouts of hunger that subside. No headaches or nausea. Worried about too often more than too much.
Any help?
Thanks!
Fasting and metabolism
What are you eating/ drinking on your fast days? Water, bone broth. New to this just curious 
I think I might fall in that camp.
Constant yo-yo dieter, max of 330lb, at my current adult lowest weight (and have been there since 2016).
I can’t really speak to the whole “how often” thing on fasting, but what I can tell you is that staying consistent with keto fixed my issues entirely. I don’t consider what I do “fasting”. I eat one meal a day, but I drink coffee with Heavy Whipping Cream several times a day - which the fasting purists will tell you is “breaking” whatever fast I might be doing. I also drink a lot of diet soda, monster ultra caffeine supplements and chew a lot of sugarless gum (artificial sweeteners don’t affect me at all).
I really do the big one-meal thing because that 330lb fattie still lives in my head, and likes to feel like he’s eating a big meal once a day.
Doing things this way has “Fixed” my metabolism in a sense that I’m not hungry all the time, not miserable from not eating, and eating what I consider to be a really good amount of food without at all feeling deprived. I think the best and only real strategy is one that actually works for you, fits into your schedule, etc.
I had to experiment. You probably will too. Multi-day fasts do not work for me (I get the hangries and quit). But doing things this “OMAD” way has allowed me to keep this 165lb weight for a good clip now. It fits into my schedule nicely, I eat dinner with everyone, and as a bonus I get to disgust my family with all the fat I eat. Yeah, fat phobia is still alive and well in my home 
But I don’t care.
I’m also curious about the effects on metabolism of repeated fasts with little break. I know my metabolism is messed up and I feel like I’m finally on the path to fixing it. Very curious what others say about the impact.
Definitely don’t want to wreck the metabolism. I think this article helps. My takeaway is that if you are already lean and don’t have a lot of fat to use for fuel, your body may start burning lean mass adversely affecting metabolism, which you don’t want! I think there is quite a bit of controversy about the lean mass question and how quickly that lean mass is rebuilt especially factoring in that we are all unique. A lot of people who participate in this forum and fast are dealing with significant health issues and obesity, which can be helped with extended fasting.
An obese person can obtain a whole day’s worth of energy from their stored fat, but a lean person can’t, so if you want to be on the safe side, if you’re lean, you probably don’t want to do a lot of EF. Also, there are some lean people who do fasting for therapeutic reasons (cancer, etc.).
I am a small (vertically challenged) person and lost about 20% of my current weight doing EF (3 days) and keto. I’m only doing 24 hour fasts now that my weight is in the normal zone because I have a hard time fasting and I don’t want to wreck my metabolism.
N=1, or What I did…
Went keto Halloween ‘17. Lost fat and some inches for 2 months. Then started fasting January ‘18. For the last 3 months have fasted 30 of 90 days. Emphasized feasting in an attempt to reboot metabolism probably wrecked by 5 decades of CICO yo-yo low fat misguidance.
I stayed with this over the last 3 months even though I lost no fat, in fact am 12 lbs over my low scale reading. I did lose 4” in pant waist size and had to buy 36” waist pants that I haven’t fit in since college (32 yrs).
Now I feel I am stoked to launch into phase 2 of my body renovation project. To go from 225 to 165lbs, 36” to 30” pants and from a beer keg to a six pack!! I plan to launch this with a 3 week water only fast (April 1), then, with an ongoing 3 days fasted a week schedule
I believe (faith - not measured) I have rebuilt my metabolism and will be that much more effective at fasting with full benefits of autophagy (maybe) and high energy
Let’s see what happens!