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The Power of Intermittent Fasting: How Intermittent Fasting Can Positively Impact Your Health

  • Writer: William Stivaletta
    William Stivaletta
  • Nov 12, 2023
  • 8 min read

The concept of fasting has deep historical roots in religious practices such as Ramadan, where the act of limiting food intake goes beyond physical restriction. Ramadan, a sacred month in Islam, represents a time when adherents embark on a spiritual and transformative journey.

During this period, the fast is not just a restriction on food; it becames a profound expression of devotion, self-discipline, and solidarity within the Muslim community. Fasting from dawn to sunset is a symbolic gesture, aligning believers with the struggles of the less fortunate, fostering empathy, and reinforcing the importance of gratitude. It serves as a spiritual cleanse, allowing individuals to reflect on their actions, seek forgiveness, and strengthen their connection with God.


Recently, Intermittent Fasting has exploded into the spotlight as one of the most powerful diets around! And, you know me – as a Nutritionist, I'm all about delving into the evidence to get a thorough understanding. So, take a seat, because today, I will explore Intermittent Fasting, uncovering its diverse methods and explaining the health benefits it brings to the table and possible risks.


Understanding Intermittent Fasting

Intermittent Fasting by William Stivaletta

Intermittent fasting is a dietary pattern where food is consumed within a defined period, followed by fasting for the remaining hours. Several methods fall under the Intermittent fasting umbrella, including Time-Restricted Eating (16:8; 18:6; 20:4), the 5:2 fasting, and Alternate-Day Fasting.


  • Time-Restricted Eating: A popular 16/8 method, where fasting occurs for 16 hours, and eating is limited to an 8-hour window.

  • 5:2 Fasting: this method involves five days of regular healthing eating and two days of restricted calorie intake (500-600 calories).

  • Alternate-Day Fasting: Alternating between days of fasting and days of regular eating.

Efficacy of fasting for Weight Loss


While fasting has gained popularity as a weight loss strategy, the findings from studies present are mixed. When compared to Energy Restriction Diet, outcomes in terms of weight loss appear comparable. However, the real game-changers are factors like adherence and metabolic health.


We're well aware that the fundamental principle of weight loss revolves around creating a calorie deficit – calories in versus calories out. This negative balance is the golden ticket to shedding those pounds.

Now, during fasting and the limited eating windows, the potential to consume extra calories exists, and it is not a guarantee to lose weight if there's an overcompensation of calories during eating windows. It's a possibility that might make you think, "Well, if you overeat during those times, weight gain is inevitable."


The Risk exists, but here's the intriguing twist: the very nature of intermittent fasting often leads to the opposite. The condensed eating periods and the overall structure of the diet tend to encourage reduced calorie intake. It's a bit like a built-in mechanism that naturally promotes eating less. So, while the equation involves calories, the unique dynamics of intermittent fasting might just tip the scales in favour of weight loss for many. It's like working smarter, not harder, in the journey towards a calorie deficit.


Beyond Weight Loss


Fasting induces a metabolic switch between fed and fasting states, optimizing cellular use of fuel sources. This shift favours ketone bodies and fatty acids over glucose, ameliorating metabolic inflexibility observed in conditions like obesity and type 2 diabetes mellitus. Fasting activates pathways for rejuvenation and repair, involving key signalling pathways such as FOXO, mTOR, AMPK, and autophagy.


Intermittent fasting doesn't just stop at weight loss; and it's also beneficial to overall health!


Fasting improves insulin resistance, reduces inflammation, a boost to cardiovascular health, and even a mood enhancement. Now, as a nutritionist with a keen eye for the critical details, my question is: Is this improvement solely linked to shedding those extra pounds, or could it be the body's way of kicking into high gear, working harder to generate energy?


Fasting exhibits beneficial impacts on maintaining stable glucose levels and enhancing insulin sensitivity. While weight loss is a factor in these improvements, the repetitive metabolic switching during fasting further improves the body's ability to adapt metabolically. The decrease in insulin levels induced by fasting might also contribute to the reduction of body fat mass. This creates a responsive cycle where both aspects mutually support each other, resulting in improved health.

Fasting holds substantial promise in enhancing lipid profiles, ameliorating cardiovascular risk factors, and alleviating inflammation, thus contributing significantly to overall cardiovascular health. One key mechanism underlying these positive outcomes is the metabolic shift from glucose to fatty acid metabolism that occurs during fasting.


The transition to fatty acid metabolism is intricately linked to improvements in lipid profiles. Fasting tends to enhance the breakdown of stored fats, leading to a reduction in circulating levels of LDL cholesterol and triglycerides, both of which are key risk factors for cardiovascular diseases. This shift in energy utilization contributes to a more favorable lipid profile, aligning with better cardiovascular health.


One of the major benefits of fasting is adiponectin, a hormone associated with anti-atherosclerotic and anti-inflammatory effects. Fasting has been shown to elevate adiponectin levels, providing an additional layer of cardiovascular protection. The anti-atherosclerotic properties of adiponectin involve its role in inhibiting the inflammatory processes and promoting the health of blood vessels, thus mitigating the risk of cardiovascular events.


Beyond its direct impact on metabolic and cardiovascular parameters, fasting has been linked to alterations in the gut microbiota. Emerging evidence suggests that fasting may exert positive effects on gut health, with potential implications for overall well-being. Studies indicate an increase in beneficial bacteria, notably Akkermansia muciniphila, known for its association with improved gut health. This bacterium has been linked to the maintenance of mucosal integrity and regulation of inflammation within the gastrointestinal tract.


The interplay between fasting, gut microbiota, and cardiovascular health represents a fascinating area of research. The positive modulation of gut microbiota composition during fasting may contribute to the overall health benefits observed in individuals practicing fasting regimens. Further exploration of these intricate connections holds the potential to uncover novel therapeutic avenues for promoting cardiovascular health and overall well-being.

Intermittent Fasting from Intermittent fasting. Personal diet plan concept. Vector illustration By Double Brain

In addition to its potential effects on weight management and addressing chronic conditions, intermittent fasting has been associated with several other potential benefits:


Promoting Gut Rest: Intermittent fasting may offer periods of gut rest, allowing the digestive system to take a break between eating periods. This can be particularly beneficial for individuals with irritable bowel syndrome (IBS) or other digestive issues, as it may reduce the workload on the digestive tract and potentially alleviate symptoms.


Improved Sleep: Some individuals report improvements in sleep quality when practicing intermittent fasting. The fasting and eating windows can influence circadian rhythms and may contribute to better sleep patterns.


Enhanced Mood: While more research is needed, there is some evidence to suggest that intermittent fasting might have positive effects on mood. Some individuals report increased mental clarity and improved mood during fasting periods. This could be attributed to various factors, including hormonal changes and the potential influence on neurotransmitters.


It's important to note that individual responses to intermittent fasting can vary, and these potential benefits may not be universal. Additionally, the existing research on intermittent fasting is still evolving, and more studies are needed to fully understand its long-term effects on various aspects of health.


Ensuring the Safety of Intermittent Fasting

Intermittent fasting. Personal diet plan concept. Vector illustration By Double Brain

It's crucial to recognize that intermittent fasting may not be suitable for everyone.

Before embarking on intermittent fasting or any diet, it's advisable to consult with your Nutritionist or Dietitian as certain groups of people should avoid intermittent fasting:

  1. Children and teens under age 18: Fasting may interfere with their nutritional needs during crucial growth periods.

  2. Pregnant or breastfeeding women: These individuals have increased nutritional requirements, and fasting may not provide sufficient nutrients for both the mother and the developing baby.

  3. People with type 1 diabetes who take insulin: The concern arises from the potential risk of unsafe hypoglycemia levels during the fasting period, especially for those dependent on insulin.

  4. Individuals with a history of eating disorders: Fasting may trigger or exacerbate disordered eating patterns.

It's essential to approach any dietary change mindfully and ensure that it aligns with individual health needs and circumstances; personalized guidance can help ensure that the chosen dietary approach aligns with individual health needs and goals.


Research indicates that intermittent fasting is generally well-tolerated and does not result in persistent gastrointestinal issues, such as constipation, diarrhea, nausea, dry mouth, or bad breath. However, individual experiences may vary, and some individuals might encounter different challenges with the diet. In general, intermittent fasting appears to be well-received without significant adverse effects on the digestive system or energy levels.


This Diet comes with the risk of undereating and potential nutritional deficiencies. It's crucial to emphasize the importance of maintaining a balanced diet and ensuring nutritional adequacy, especially when practising intermittent fasting. Therefore, when not fasting, focus on consuming a variety of nutrient-dense foods. Include a range of fruits, vegetables, whole grains, lean proteins, and healthy fats to ensure a broad spectrum of essential nutrients. Drink an adequate amount of water to support overall well-being and bodily functions.


I'm excited to delve deeper into the subject of intermittent fasting, as I find it exceptionally fascinating. If you share your thoughts, I'd be more than happy to create another post focusing on how to implement and what to consider in terms of diet when it comes to intermittent fasting. Please leave a message or comment, and I'll address it in a future post.


In conclusion, fasting emerges as a fascinating weight loss and potential health improvements diet. While studies highlight its benefits, additional research is necessary to determine optimal fasting periods and assess long-term sustainability. Embracing the simplicity of fasting, liberated from daily calorie counting, could be a transformative journey toward a healthier lifestyle.


It's important to recognize that there's no one-size-fits-all diet. Therefore, it's essential to consider your individual needs, goals, motivation, and safety. I believe this diet is safe to follow and can genuinely help with new eating behaviours, especially for those prone to boredom eating or excessive snacking leading to overeating. However, safety should always be a priority and monitored by a professional.


Let me know your thoughts on this post, and I'd be happy to share more aspects in future posts.


References:


  • Harris L, Hamilton S, Azevedo LB, Olajide J, De Brún C, Waller G, Whittaker V, Sharp T, Lean M, Hankey C, Ells L (2018). Intermittent fasting interventions for the treatment of overweight and obesity in adults: a systematic review and meta-analysis. JBI Database of Systematic Reviews and Implementation Reports 16(2): 507-547.

  • Özkul, C. Yalınay, M. & Karakan, T. (2019) Islamic fasting leads to an increased abundance of Akkermansia muciniphila and Bacteroides fragilis group: A preliminary study on intermittent fasting. Turk J Gastroenterol 30(12): 1030-1035.

  • Patikorn, C. Roubal, K.. Veettil, SK. Chandran, V. Pham, T. Lee, YY. Giovannucci, EL. Varady, KA. Chaiyakunapruk, N. (2021) Intermittent Fasting and Obesity-Related Health Outcomes An Umbrella Review of Meta-analyses of Randomized Clinical Trials JAMA Network Open.4(12):e2139558.

  • Seimon RV, Roekenes JA, Zibellini J, Zhu B, Gibson AA, Hills AP, Wood RE, King NA, Byrne NM, Sainsbury A (2015). Do intermittent diets provide physiological benefits over continuous diets for weight loss? A systematic review of clinical trials. Mol Cell Endocrinol. 418:153-72.

  • Shalabi, H., Hassan IV, A.S., Al-Zahrani, F.A., Alarbeidi, A.H., Mesawa, M., Rizk, H., Aljubayri, A.A., Alarbeidi IV, A.H. and Aljubayri IV, A.A., 2023. Intermittent Fasting: Benefits, Side Effects, Quality of Life, and Knowledge of the Saudi Population. Cureus, 15(2).

  • Song, D.K. and Kim, Y.W., 2022. Beneficial effects of intermittent fasting: a narrative review. Journal of Yeungnam Medical Science, 40(1), pp.4-11.

  • Su, J. Wang, Y. Zhang, X. Ma, M. Xie, Z. Pan, Q. Ma, Z. Peppelenbosch, MP. (2021). Remodeling of the Gut Microbiome during Ramadan-Associated Intermittent Fasting. Am. J. Clin. Nutr. 113(5): 1332–1342.

  • Sutton, EF. Beyl, R. Early, KS. Cefalu, WT. Ravussin, E. and Peterson, CM. (2018) Early Time-Restricted Feeding Improves Insulin Sensitivity, Blood Pressure, and Oxidative Stress Even Without Weight Loss in Men with Prediabetes Cell Metab. 27(6): 1212–1221.

  • Templeman, I. Smith, HA. Chowdhury, E. Chen, YC. Carroll, H. Johnson-Bonson, D. Hengist, A. Smith, R. Creighton, J. Betts, JA. (2021) A randomized controlled trial to isolate the effects of fasting and energy restriction on weight loss and metabolic health in lean adults Science Translational Medicine Vol 13 No. 598.

  • Thomas, A. Zaman A. Cornier, MA. Catenacci, VA., Tussey, EJ. Grau, L., Arbet, J. Broussard, JL. Rynders, CA. (2021) Later Meal and Sleep Timing Predicts Higher Percent Body Fat Nutrients 13(1):73.

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