Intermittent Fasting: A Comprehensive Guide
- Dec 1, 2025
Intermittent Fasting (IF) is a unique diet strategy that cycles between designated times of fasting and eating. This guide will walk you through its various types, the potential health advantages, and who should avoid engaging in it.
Intermittent Fasting & Weight Loss: How Does it Work?
According to Dr. Rekha Kumar, a specialist in metabolism and endocrinology at Weill Cornell Medicine, one theory for weight reduction through IF can be the resulting net calorie deficit from fasting phases, leading to weight loss.
The other notion, she suggests, is that intermittent fasting seems to ward off the "plateau phenomenon", a metabolic slowdown. Studies indicate IF can result in a drop of 1 to 8 percent in starting weight, similar to that under a calorie-restrictive diet. Furthermore, benefits can also encompass better cardiometabolic health, such as reduced insulin resistance and lower blood pressure.
Apart from shedding pounds, fans of IF believe it offers more. Renowned nutrition and weight loss expert Dr. Lori Shemek believes IF could enhance insulin sensitivity, reduce inflammation, and improve mitochondrial health. However, she warns that studying the impacts of IF on lifetime longevity is complex, and most existing research in this area is based on animal models.
Who Should Refrain from Intermittent Fasting?
Despite its potential benefits, IF isn't suitable for everyone. Individuals with a history of eating disorders must tread carefully. Notably, Dr. Kumar advises against IF for pregnant women or those trying to conceive as it might disturb menstrual cycles, those on diabetes medication due to the risk of a significant drop in blood sugar, and individuals on multiple medications as the eating patterns can impact absorption and dosage.
Exploring the Techniques of Intermittent Fasting
As you explore IF, acknowledging that the research data is mostly derived from animal studies is crucial. The applicability of these findinings to humans is often complicated due to factors like stress levels, erratic schedules, and hunger pangs impacting strict adherence to the diet plan.
Depending upon lifestyles, habits, and preferences, various forms of IF may be considered. These include 5:2 fasting, time-restricted fasting, whole-day fasting, alternate-day fasting, choose-your-day fasting, and one-meal-a-day fasting.
Yet, while experimenting with these tactics, it's essential to remember that your training plans, nutritional demands, and social life may impact your ability to stick to the diet plan. Thus, it's advisable to tailor your IF approach to your unique circumstances for optimal results.
Final Words
There is plenty of intermittent fasting methods to choose from based upon individual goals and preferences. Scientific research frequently hints at the promising benefits of certain types of IF, but these are largely founded on animal studies. Thus, it's wise to approach IF with reasonable expectations about its possible health benefits.
Commencing IF isn't a decision to be made lightly. Consultation with a healthcare professional is recommended before making any significant lifestyle and diet changes.