What You Need to Know: Intermittent Fasting vs Time Restricted Eating

Understanding Intermittent Fasting

Intermittent Fasting (IF) involves splitting each day into eating and fasting periods. The 16/8 plan is popular, requiring a 16-hour fast and an 8-hour eating window. This method is flexible, allowing adjustments based on personal health markers and how you feel.

Some people follow the 16/8 plan daily, while others do it a few times weekly. Another IF approach is the 5:2 diet. Unlike the 16/8 plan, the 5:2 diet alternates between fasting and eating days. [1]

Benefits of Intermittent Fasting


IF supports healthy weight management by utilizing fat stores for energy. It also maintains stable energy levels, preventing the ups and downs from frequent eating. Fasting boosts brain function by increasing brain-derived neurotrophic factor (BDNF), which supports neuron growth and brain connectivity.

Furthermore, IF enhances cognitive function, including memory and overall brain health. It helps regulate blood sugar levels by using the body’s glucose supply during fasting. This prevents excess blood sugar from accumulating.[2]

Who Should Avoid Intermittent Fasting?

IF is not recommended for diabetics, hypoglycemics, or those with blood sugar regulation issues. Pregnant or breastfeeding women should avoid it, as well as individuals recovering from disordered eating. [3]

Understanding Time-Restricted Eating

Time restricted eating

Time-Restricted Eating (TRE) is similar to IF, focusing on eating and fasting windows. The difference is that TRE emphasizes the eating window’s length rather than fasting duration. A common starting point is a 12-hour eating window, gradually reduced to 10, 8, or even 6 hours.

Benefits of Time-Restricted Eating

TRE supports weight management by lowering body mass while maintaining lean mass. It also improves sleep and energy by aligning with the body’s natural circadian rhythm. Eating earlier in the day supports better sleep since the body isn’t digesting food before bedtime.

Deciding Between IF and TRE


To choose between IF and TRE, consider what’s easier for you: remembering when to eat or fast. IF focuses on fasting duration, while TRE focuses on eating times. Also, think about when you’re most hungry. If you don’t crave breakfast, IF may be easier. If you’re hungry after a morning workout, TRE might suit you better.

Another factor is whether you prefer tracking food intake. Many IF plans don’t require calorie counting, but the 5:2 plan does. TRE typically doesn’t require tracking what you eat. [4]

Final Thoughts

IF and Time-Restricted Eating offer different benefits and methods to support health and weight management. Choose the approach that fits your lifestyle and preferences. Both methods are flexible, allowing adjustments to suit individual health needs and goals.

By considering your hunger patterns and whether you prefer focusing on fasting or eating times, you can find the best method for you. Whether it’s IF or TRE, both offer significant health benefits and can be tailored to your needs.

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