Fasting has been practiced for millennia by many cultures around the world for its physical and spiritual benefits, and science is only now rediscovering its significance in promoting health, from preserving the integrity of your gut barrier and strengthening your immune system to improving your mental health. Fasting is being praised as a simple yet powerful tool to optimize your body and enhance your performance.

The science behind fasting

Fasting changes your body at a molecular level; it improves the way your cells use sugar by changing glucose metabolism and insulin sensitivity, and it induces ketosis, which is a metabolic state that depends on lipids as a main energy source, burning through the fat stores in your body and helping you to lose weight. It also triggers cellular pathways that improve cell regeneration, repairing your body and boosting your longevity. Different methods of fasting or dietary restriction are recognized and backed by scientific evidence. Intermittent fasting is a cycle of relatively short periods of dietary restriction (12 to 24 hours) followed by eating periods of similar durations. Prolonged or periodic fasting, on the other hand, is up to 21 days of only water consumption, followed by at least 7 days of eating. Studies linked these fasting methods to increased longevity and lower risk of chronic diseases and metabolic disorders.

Fasting and longevity

Fasting slows cellular aging and strengthens regeneration and replacement of damaged and old cells; it initiates a process called autophagy, where cells digest and recycle old and dysfunctional organelles. Additionally, through complex hormonal and metabolic pathways, fasting turns on programmed cell death, or apoptosis, and activates stem cells to replace dying ones, essentially renewing your tissues and cell populations. By slowing your body’s aging and even reversing it, fasting substantially diminishes the risk of most age-related chronic diseases, like cardiovascular disorders, diabetes, neurodegenerative conditions, and cancer.

The gut-protective role of fasting

In addition to its effects on longevity, fasting “resets” your gut microbiome. Studies found that it has a positive impact on the composition and diversity of the microbiome in the gut, promoting the growth of beneficial bacteria and diminishing the numbers of the harmful ones. Levels of small-chain fatty acids increase after periods of fasting; this healthy form of fat is produced in the gut through the action of gut microbiota; it improves sugar and fat metabolism. Another observed effect of fasting on the gut is the reduction of inflammation; it has a calming effect on your immune system, reducing the proinflammatory substances in your body and controlling the function of immune cells. This, coupled with the effect on the gut microbiome, makes fasting a simple solution for leaky gut, protecting your gut barrier.

Fasting for a sharper mind

Have you ever noticed that you think more clearly on an empty stomach? Turns out this is a real scientifically proven effect of fasting; it improves your cognitive function, sharpens your memory, and overall heightens your brain performance. Fasting increases the levels ofbrain-derived neurotrophic factor, a protein responsible for the survival of your neurons. Lower levels of this protein are associated with worse brain health and neurodegenerative diseases like Alzheimer’s, so fasting not only improves your focus, it also protects your brain and prevents age-related degenerative conditions, further adding to its longevity benefits.

Do you find fasting too hard? Try a fasting-mimicking diet

If restricting food entirely seems challenging to you, a fasting mimicking diet might be the solution. This is a type of diet that restricts carbohydrates and proteins and consists mainly of vegetables, nuts, seeds, and healthy oils like olive oil. This type of diet does not activate the food-sensing pathways that are normally activated after eating, so it mimics fasting while supplying you with some calories and nutrients.

Tips for safer fasting

Whether you are trying intermittent fasting, prolonged fasting, or fasting mimicking diets, these are a few tips to help you practice fasting safely:

  • Do your research and consult a trained professional before starting; they can help you pick which type of fasting suits you best.
  • The eating period is as important as the fasting period; make sure to get enough nutrients and calories for your body to repair and regenerate.
  • If you’re pregnant, lactating, or have an eating disorder, it’s better to avoid fasting without consulting your doctor.

Fasting is ancient, and when done correctly, it does wonders for your physical and mental health. Consult our professionals now to see if fasting is the right thing for you. It might be your key for a clearer mind and a healthier body.

References

  • Longo VD, Di Tano M, Mattson MP, Guidi N. Intermittent and periodic fasting, longevity and disease. Nat Aging. 2021 Jan;1(1):47-59. doi: 10.1038/s43587-020-00013-3. Epub 2021 Jan 14. PMID: 35310455; PMCID: PMC8932957.https://pmc.ncbi.nlm.nih.gov/articles/PMC8932957/
  • Mousavi SN, Rayyani E, Heshmati J, Tavasolian R, Rahimlou M. Effects of Ramadan and Non-ramadan Intermittent Fasting on Gut Microbiome. Front Nutr. 2022 Mar 22;9:860575. doi: 10.3389/fnut.2022.860575. PMID: 35392284; PMCID: PMC8980861.https://pmc.ncbi.nlm.nih.gov/articles/PMC8980861/
  • den Besten G, van Eunen K, Groen AK, Venema K, Reijngoud DJ, Bakker BM. The role of short-chain fatty acids in the interplay between diet, gut microbiota, and host energy metabolism. J Lipid Res. 2013 Sep;54(9):2325-40. doi: 10.1194/jlr.R036012. Epub 2013 Jul 2. PMID: 23821742; PMCID: PMC3735932.https://pmc.ncbi.nlm.nih.gov/articles/PMC3735932/
  • Fusco W, Lorenzo MB, Cintoni M, Porcari S, Rinninella E, Kaitsas F, Lener E, Mele MC, Gasbarrini A, Collado MC, Cammarota G, Ianiro G. Short-Chain Fatty-Acid-Producing Bacteria: Key Components of the Human Gut Microbiota. Nutrients. 2023 May 6;15(9):2211. doi: 10.3390/nu15092211. PMID: 37432351; PMCID: PMC10180739.https://pmc.ncbi.nlm.nih.gov/articles/PMC10180739/
  • Karin Seidler, Michelle Barrow, Intermittent fasting and cognitive performance – Targeting BDNF as potential strategy to optimise brain health, Frontiers in Neuroendocrinology, Volume 65, 2022, 100971, ISSN 0091-3022,https://doi.org/10.1016/j.yfrne.2021.100971. (https://www.sciencedirect.com/science/article/pii/S009130222100073X)
  • Faris MA, Kacimi S, Al-Kurd RA, Fararjeh MA, Bustanji YK, Mohammad MK, Salem ML. Intermittent fasting during Ramadan attenuates proinflammatory cytokines and immune cells in healthy subjects. Nutr Res. 2012 Dec;32(12):947-55. doi: 10.1016/j.nutres.2012.06.021. Epub 2012 Oct 4. PMID: 23244540.https://pubmed.ncbi.nlm.nih.gov/23244540/