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How do you feel about fasting?

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Replies

  • johnslater461
    johnslater461 Posts: 449 Member
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    LeeshaSeal wrote: »
    You really should actually vet your sources



    http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2623528
    Conclusions and Relevance Alternate-day fasting did not produce superior adherence, weight loss, weight maintenance, or cardioprotection vs daily calorie restriction.

    https://academic.oup.com/ajcn/article/81/1/69/4607679
    In conclusion, alternate-day fasting is feasible in nonobese subjects for short time periods, although unlike rodents, the subjects were unable to maintain their body weight. Furthermore, fat oxidation was increased and translated into fat mass loss. Hunger on fasting days did not habituate over the course of the study, which perhaps indicates the unlikelihood of subjects continuing on this diet for extended periods of time. Whether alternate-day fasting would promote weight loss in an obese population is uncertain.
    https://insights.ovid.com/crossref?an=01938924-201802000-00016
    Conclusions:
    Intermittent energy restriction may be an effective strategy for the treatment of overweight and obesity. Intermittent energy restriction was comparable to continuous energy restriction for short term weight loss in overweight and obese adults. Intermittent energy restriction was shown to be more effective than no treatment, however, this should be interpreted cautiously due to the small number of studies and future research is warranted to confirm the findings of this review.

    https://www.sciencedirect.com/science/article/pii/S1550413118302535

    Paywalled
    8vox1x5tojb9.png


    Yes, we can see that too.

    No mention of controls, methodology, etc. That information is presumably in the full text, which is behind a paywall


    Useful information like how many patients, how long the study went. What fasting period was used. Whether/how calories and metabolic activity were tracked. Little basic stuff.


    Found the full text.

    8 subjects, 5 weeks, and suffers from the multiple comparisons problem.

    https://www.google.com/amp/s/amp.reddit.com/r/science/comments/8il3p4/early_timerestricted_feeding_improves_insulin/#ampf=undefined

    Was it the dropbox link?

    I couldn't find anything else that looked promising.

    Yes, the dropbox link.

  • LeeshaSeal
    LeeshaSeal Posts: 61 Member
    Options
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    You really should actually vet your sources



    http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2623528
    Conclusions and Relevance Alternate-day fasting did not produce superior adherence, weight loss, weight maintenance, or cardioprotection vs daily calorie restriction.

    https://academic.oup.com/ajcn/article/81/1/69/4607679
    In conclusion, alternate-day fasting is feasible in nonobese subjects for short time periods, although unlike rodents, the subjects were unable to maintain their body weight. Furthermore, fat oxidation was increased and translated into fat mass loss. Hunger on fasting days did not habituate over the course of the study, which perhaps indicates the unlikelihood of subjects continuing on this diet for extended periods of time. Whether alternate-day fasting would promote weight loss in an obese population is uncertain.
    https://insights.ovid.com/crossref?an=01938924-201802000-00016
    Conclusions:
    Intermittent energy restriction may be an effective strategy for the treatment of overweight and obesity. Intermittent energy restriction was comparable to continuous energy restriction for short term weight loss in overweight and obese adults. Intermittent energy restriction was shown to be more effective than no treatment, however, this should be interpreted cautiously due to the small number of studies and future research is warranted to confirm the findings of this review.

    https://www.sciencedirect.com/science/article/pii/S1550413118302535

    Paywalled
    8vox1x5tojb9.png


    Yes, we can see that too.

    No mention of controls, methodology, etc. That information is presumably in the full text, which is behind a paywall


    Useful information like how many patients, how long the study went. What fasting period was used. Whether/how calories and metabolic activity were tracked. Little basic stuff.


    Found the full text.

    8 subjects, 5 weeks, and suffers from the multiple comparisons problem.

    https://www.google.com/amp/s/amp.reddit.com/r/science/comments/8il3p4/early_timerestricted_feeding_improves_insulin/#ampf=undefined

    Reddit?...
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    You really should actually vet your sources



    http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2623528
    Conclusions and Relevance Alternate-day fasting did not produce superior adherence, weight loss, weight maintenance, or cardioprotection vs daily calorie restriction.

    https://academic.oup.com/ajcn/article/81/1/69/4607679
    In conclusion, alternate-day fasting is feasible in nonobese subjects for short time periods, although unlike rodents, the subjects were unable to maintain their body weight. Furthermore, fat oxidation was increased and translated into fat mass loss. Hunger on fasting days did not habituate over the course of the study, which perhaps indicates the unlikelihood of subjects continuing on this diet for extended periods of time. Whether alternate-day fasting would promote weight loss in an obese population is uncertain.
    https://insights.ovid.com/crossref?an=01938924-201802000-00016
    Conclusions:
    Intermittent energy restriction may be an effective strategy for the treatment of overweight and obesity. Intermittent energy restriction was comparable to continuous energy restriction for short term weight loss in overweight and obese adults. Intermittent energy restriction was shown to be more effective than no treatment, however, this should be interpreted cautiously due to the small number of studies and future research is warranted to confirm the findings of this review.

    https://www.sciencedirect.com/science/article/pii/S1550413118302535

    Paywalled
    8vox1x5tojb9.png


    Yes, we can see that too.

    No mention of controls, methodology, etc. That information is presumably in the full text, which is behind a paywall


    Useful information like how many patients, how long the study went. What fasting period was used. Whether/how calories and metabolic activity were tracked. Little basic stuff.


    Found the full text.

    8 subjects, 5 weeks, and suffers from the multiple comparisons problem.

    https://www.google.com/amp/s/amp.reddit.com/r/science/comments/8il3p4/early_timerestricted_feeding_improves_insulin/#ampf=undefined

    Reddit?...

    If you had bothered to follow the link, you would find a link to the full text

    I did follow the full link and it is the same abbreviated version from before. You have to pay for access.
  • johnslater461
    johnslater461 Posts: 449 Member
    Options
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    You really should actually vet your sources



    http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2623528
    Conclusions and Relevance Alternate-day fasting did not produce superior adherence, weight loss, weight maintenance, or cardioprotection vs daily calorie restriction.

    https://academic.oup.com/ajcn/article/81/1/69/4607679
    In conclusion, alternate-day fasting is feasible in nonobese subjects for short time periods, although unlike rodents, the subjects were unable to maintain their body weight. Furthermore, fat oxidation was increased and translated into fat mass loss. Hunger on fasting days did not habituate over the course of the study, which perhaps indicates the unlikelihood of subjects continuing on this diet for extended periods of time. Whether alternate-day fasting would promote weight loss in an obese population is uncertain.
    https://insights.ovid.com/crossref?an=01938924-201802000-00016
    Conclusions:
    Intermittent energy restriction may be an effective strategy for the treatment of overweight and obesity. Intermittent energy restriction was comparable to continuous energy restriction for short term weight loss in overweight and obese adults. Intermittent energy restriction was shown to be more effective than no treatment, however, this should be interpreted cautiously due to the small number of studies and future research is warranted to confirm the findings of this review.

    https://www.sciencedirect.com/science/article/pii/S1550413118302535

    Paywalled
    8vox1x5tojb9.png


    Yes, we can see that too.

    No mention of controls, methodology, etc. That information is presumably in the full text, which is behind a paywall


    Useful information like how many patients, how long the study went. What fasting period was used. Whether/how calories and metabolic activity were tracked. Little basic stuff.


    I only included the linked highlights. That information is likely there but you have to purchase the article to see the full study. My point is that I am vetting my sources, and that I am providing valid information. If you don't agree with it, that's okay.

    If you haven't examined the study, you haven't vetted the source

    You were quick to throw back your snippets without fully reading the article.

    Pretty easy to see the methodology.

    Small sample size plus multiple comparisons problem = worthless.

    Even the authors of the study referred to it as a proof of concept and listed several limitations
  • johnslater461
    johnslater461 Posts: 449 Member
    Options
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    You really should actually vet your sources



    http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2623528
    Conclusions and Relevance Alternate-day fasting did not produce superior adherence, weight loss, weight maintenance, or cardioprotection vs daily calorie restriction.

    https://academic.oup.com/ajcn/article/81/1/69/4607679
    In conclusion, alternate-day fasting is feasible in nonobese subjects for short time periods, although unlike rodents, the subjects were unable to maintain their body weight. Furthermore, fat oxidation was increased and translated into fat mass loss. Hunger on fasting days did not habituate over the course of the study, which perhaps indicates the unlikelihood of subjects continuing on this diet for extended periods of time. Whether alternate-day fasting would promote weight loss in an obese population is uncertain.
    https://insights.ovid.com/crossref?an=01938924-201802000-00016
    Conclusions:
    Intermittent energy restriction may be an effective strategy for the treatment of overweight and obesity. Intermittent energy restriction was comparable to continuous energy restriction for short term weight loss in overweight and obese adults. Intermittent energy restriction was shown to be more effective than no treatment, however, this should be interpreted cautiously due to the small number of studies and future research is warranted to confirm the findings of this review.

    https://www.sciencedirect.com/science/article/pii/S1550413118302535

    Paywalled
    8vox1x5tojb9.png


    Yes, we can see that too.

    No mention of controls, methodology, etc. That information is presumably in the full text, which is behind a paywall


    Useful information like how many patients, how long the study went. What fasting period was used. Whether/how calories and metabolic activity were tracked. Little basic stuff.


    Found the full text.

    8 subjects, 5 weeks, and suffers from the multiple comparisons problem.

    https://www.google.com/amp/s/amp.reddit.com/r/science/comments/8il3p4/early_timerestricted_feeding_improves_insulin/#ampf=undefined

    Reddit?...
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    You really should actually vet your sources



    http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2623528
    Conclusions and Relevance Alternate-day fasting did not produce superior adherence, weight loss, weight maintenance, or cardioprotection vs daily calorie restriction.

    https://academic.oup.com/ajcn/article/81/1/69/4607679
    In conclusion, alternate-day fasting is feasible in nonobese subjects for short time periods, although unlike rodents, the subjects were unable to maintain their body weight. Furthermore, fat oxidation was increased and translated into fat mass loss. Hunger on fasting days did not habituate over the course of the study, which perhaps indicates the unlikelihood of subjects continuing on this diet for extended periods of time. Whether alternate-day fasting would promote weight loss in an obese population is uncertain.
    https://insights.ovid.com/crossref?an=01938924-201802000-00016
    Conclusions:
    Intermittent energy restriction may be an effective strategy for the treatment of overweight and obesity. Intermittent energy restriction was comparable to continuous energy restriction for short term weight loss in overweight and obese adults. Intermittent energy restriction was shown to be more effective than no treatment, however, this should be interpreted cautiously due to the small number of studies and future research is warranted to confirm the findings of this review.

    https://www.sciencedirect.com/science/article/pii/S1550413118302535

    Paywalled
    8vox1x5tojb9.png


    Yes, we can see that too.

    No mention of controls, methodology, etc. That information is presumably in the full text, which is behind a paywall


    Useful information like how many patients, how long the study went. What fasting period was used. Whether/how calories and metabolic activity were tracked. Little basic stuff.


    Found the full text.

    8 subjects, 5 weeks, and suffers from the multiple comparisons problem.

    https://www.google.com/amp/s/amp.reddit.com/r/science/comments/8il3p4/early_timerestricted_feeding_improves_insulin/#ampf=undefined

    Reddit?...

    If you had bothered to follow the link, you would find a link to the full text

    I did follow the full link and it is the same abbreviated version from before. You have to pay for access.

    Try again. It's in the dropbox link
  • LeeshaSeal
    LeeshaSeal Posts: 61 Member
    Options
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    You really should actually vet your sources



    http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2623528
    Conclusions and Relevance Alternate-day fasting did not produce superior adherence, weight loss, weight maintenance, or cardioprotection vs daily calorie restriction.

    https://academic.oup.com/ajcn/article/81/1/69/4607679
    In conclusion, alternate-day fasting is feasible in nonobese subjects for short time periods, although unlike rodents, the subjects were unable to maintain their body weight. Furthermore, fat oxidation was increased and translated into fat mass loss. Hunger on fasting days did not habituate over the course of the study, which perhaps indicates the unlikelihood of subjects continuing on this diet for extended periods of time. Whether alternate-day fasting would promote weight loss in an obese population is uncertain.
    https://insights.ovid.com/crossref?an=01938924-201802000-00016
    Conclusions:
    Intermittent energy restriction may be an effective strategy for the treatment of overweight and obesity. Intermittent energy restriction was comparable to continuous energy restriction for short term weight loss in overweight and obese adults. Intermittent energy restriction was shown to be more effective than no treatment, however, this should be interpreted cautiously due to the small number of studies and future research is warranted to confirm the findings of this review.

    https://www.sciencedirect.com/science/article/pii/S1550413118302535

    Paywalled
    8vox1x5tojb9.png


    Yes, we can see that too.

    No mention of controls, methodology, etc. That information is presumably in the full text, which is behind a paywall


    Useful information like how many patients, how long the study went. What fasting period was used. Whether/how calories and metabolic activity were tracked. Little basic stuff.


    Found the full text.

    8 subjects, 5 weeks, and suffers from the multiple comparisons problem.

    https://www.google.com/amp/s/amp.reddit.com/r/science/comments/8il3p4/early_timerestricted_feeding_improves_insulin/#ampf=undefined

    Reddit?...
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    You really should actually vet your sources



    http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2623528
    Conclusions and Relevance Alternate-day fasting did not produce superior adherence, weight loss, weight maintenance, or cardioprotection vs daily calorie restriction.

    https://academic.oup.com/ajcn/article/81/1/69/4607679
    In conclusion, alternate-day fasting is feasible in nonobese subjects for short time periods, although unlike rodents, the subjects were unable to maintain their body weight. Furthermore, fat oxidation was increased and translated into fat mass loss. Hunger on fasting days did not habituate over the course of the study, which perhaps indicates the unlikelihood of subjects continuing on this diet for extended periods of time. Whether alternate-day fasting would promote weight loss in an obese population is uncertain.
    https://insights.ovid.com/crossref?an=01938924-201802000-00016
    Conclusions:
    Intermittent energy restriction may be an effective strategy for the treatment of overweight and obesity. Intermittent energy restriction was comparable to continuous energy restriction for short term weight loss in overweight and obese adults. Intermittent energy restriction was shown to be more effective than no treatment, however, this should be interpreted cautiously due to the small number of studies and future research is warranted to confirm the findings of this review.

    https://www.sciencedirect.com/science/article/pii/S1550413118302535

    Paywalled
    8vox1x5tojb9.png


    Yes, we can see that too.

    No mention of controls, methodology, etc. That information is presumably in the full text, which is behind a paywall


    Useful information like how many patients, how long the study went. What fasting period was used. Whether/how calories and metabolic activity were tracked. Little basic stuff.


    Found the full text.

    8 subjects, 5 weeks, and suffers from the multiple comparisons problem.

    https://www.google.com/amp/s/amp.reddit.com/r/science/comments/8il3p4/early_timerestricted_feeding_improves_insulin/#ampf=undefined

    Reddit?...

    If you had bothered to follow the link, you would find a link to the full text

    I did follow the full link and it is the same abbreviated version from before. You have to pay for access.

    Try again. It's in the dropbox link

    Got it although the first 3 tabs don't change. The references tab is full of information though.
  • LeeshaSeal
    LeeshaSeal Posts: 61 Member
    Options
    LeeshaSeal wrote: »
    LeeshaSeal wrote: »
    I reread one of the sources provided in the Harvard Blog and it had some interesting things to say: https://www.annualreviews.org/doi/full/10.1146/annurev-nutr-071816-064634?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed.

    "CONLUSIONS: Even a single fasting interval in humans (e.g., overnight) can reduce basal concentrations of many metabolic biomarkers associated with chronic disease, such as insulin and glucose."

    Isn't overnight fasting what virtually all of us do (unless we're subject to sleep-eating episodes)?

    Hahaha - yes. But I think the point is even the fasting we do effortlessly has positive effects. There was much more in the conclusion.

    Great, so If we're already getting a benefit from overnight, how much additional benefit is gained from prolonged fasting... and how much longer must it be prolonged for meaningful/useful additional benefit to be acheived?

    I don't have any immediate sources like this to recommend. But I think that the scientific community is motivated to continue research related to IF.
  • emilytoplin
    emilytoplin Posts: 2 Member
    Options
    Hi OP,
    Personally, I'm a fan of IF. I usually fast 16 hours of the day and eat during an 8 hour window. It's a great way to break through a plateau. I don't like the idea of 36-48 hour fasts or really anything beyond 24 hours. I believe it is dangerous and a bad habit. Personally, if I ever fast 24 hours I am sooo hungry by the end, so I just can't see how any longer than that can be safe.
  • johnslater461
    johnslater461 Posts: 449 Member
    Options
    LeeshaSeal wrote: »
    I reread one of the sources provided in the Harvard Blog and it had some interesting things to say: https://www.annualreviews.org/doi/full/10.1146/annurev-nutr-071816-064634?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed.

    "CONLUSIONS: Even a single fasting interval in humans (e.g., overnight) can reduce basal concentrations of many metabolic biomarkers associated with chronic disease, such as insulin and glucose."

    Also

    "Research has not demonstrated that alternate-day fasting regimens produce superior weight loss in comparison to standard, continuous calorie restriction weight-loss plans."

    "There are considerable observational data on various forms of religious fasting, most of which suggest that these regimens result in transitory weight loss and have mixed impacts on other biomarkers."

    "Data are lacking regarding the impacts of intermittent fasting on other health behaviors, such as diet, sleep, and physical activity"
  • janejellyroll
    janejellyroll Posts: 25,763 Member
    Options
    Hi OP,
    Personally, I'm a fan of IF. I usually fast 16 hours of the day and eat during an 8 hour window. It's a great way to break through a plateau. I don't like the idea of 36-48 hour fasts or really anything beyond 24 hours. I believe it is dangerous and a bad habit. Personally, if I ever fast 24 hours I am sooo hungry by the end, so I just can't see how any longer than that can be safe.

    I don't see the relationship between when you personally feel hungry and how long it is generally physically safe to fast. I feel hungry after a 12 hour fast, but that doesn't mean it would be logical for me to conclude that longer fasts are unsafe.

  • CharlieBeansmomTracey
    CharlieBeansmomTracey Posts: 7,682 Member
    Options
    Studies do show that intermittent fasting improves your blood pressure, cholesterol levels and your insulin sensitivity. When you fast your body can’t get it’s energy from food so it uses your glucose which is found in your liver and muscles, that process usually happens around 8 hours after your last meal. When that stores glucose has been used up the body then starts to burn fat to get its energy which is why you lose weight. I 110% think that fasting is a great way to lose weight and works well

    well if it improves cholesterol then mine should have never been high. Ive fasted all my life.