In recent years, intermittent fasting has gained immense popularity as a lifestyle choice for weight management, improved metabolic health, and even cognitive enhancement. Among the various fasting protocols, the 16:8 method has emerged as a practical and effective approach for many individuals.
This fasting regimen involves fasting for 16 hours each day and limiting eating to an 8-hour window. This guide will walk you through the basics, meal planning, benefits, drawbacks, and recommendations associated with 16/8 intermittent fasting.
What Will I Learn?
What is 16:8 Intermittent Fasting?
The 16:8 intermittent fasting protocol is relatively straightforward. It divides the day into two main periods: the fasting period which is 16 hours and the 8 hours eating window.
During the fasting period, which typically occurs overnight and extends into the morning, no calories are consumed. Instead, individuals are encouraged to stay hydrated with water, herbal teas, or black coffee, as these beverages do not break the fast.
Once the fasting period ends, usually around midday or early afternoon, individuals can begin their 8-hour eating window. During this time, they consume all of their daily calories, ensuring proper nourishment within a condensed timeframe. It’s essential to prioritize nutrient-dense foods and maintain a balanced diet to support overall health and well-being.
This dietary approach aims to induce metabolic changes, such as increased fat burning and cellular repair, while also potentially reducing the risk of chronic diseases.[1]
7 Day 16:8 Intermittent Fasting Diet Plan
Our 7-day intermittent fasting diet plan offers a spectrum of meal choices for each day. Tailored to accommodate various preferences and goals, you have the freedom to personalize your fasting experience.
Whether you’re new to intermittent fasting or looking to improve your current routine, start at a comfortable pace. Begin with just two days a week and gradually adjust as needed to align with your preferences and objectives.
Day 1:
- Meal 1: Greek yogurt parfait with mixed berries, nuts, and honey.
- Meal 2: Grilled chicken Caesar salad.
- Meal 3: Baked salmon with broccoli and quinoa.
Day 2:
- Meal 1: Avocado toast with poached eggs and mixed fruit.
- Meal 2: Greek salad with cucumber, tomato, olives, and feta cheese.
- Meal 3: Stir-fried tofu with mixed vegetables over brown rice.
Day 3:
- Meal 1: Turkey and avocado wrap with lettuce and tomato.
- Meal 2: Lentil soup with a side of whole grain bread or crackers
- Meal 3: Grilled shrimp skewers with sweet potatoes and asparagus.
Day 4:
- Meal 1: Quinoa salad with chickpeas and lemon-tahini dressing.
- Meal 2: Cottage cheese with pineapple chunks.
- Meal 3: Baked chicken breast with Brussels sprouts and quinoa.
Day 5:
- Meal 1: Spinach and feta omelet with whole-grain toast.
- Meal 2: Lentil soup with mixed greens salad.
- Meal 3: Grilled steak with roasted root vegetables and green salad.
Day 6:
- Meal 1: Smoothie bowl topped with granola, bananas, and berries.
- Meal 2: Whole grain wrap with turkey, avocado, lettuce, and tomato
- Meal 3: Baked cod with sautéed spinach and quinoa pilaf.
Day 7:
- Meal 1: Veggie wrap with hummus, bell peppers, cucumbers, and carrots.
- Meal 2: Quinoa salad with chickpeas, cucumbers, tomatoes, and feta cheese
- Meal 3: Grilled tofu with roasted cauliflower and brown rice.
Don’t miss:
5:2 Diet Plan
Almost-OMAD Diet Plan
10 Refeed Meal Ideas
OMAD Diet Plan
How Many Calories to Eat During 16/8 Intermittent Fasting?
Determining the exact number of calories to consume during 16/8 intermittent fasting depends on various factors such as age, gender, weight, height, activity level, and specific health goals. However, there are some general guidelines you can follow to estimate your calorie needs.
While a minimum of 1,500 calories is often recommended for the average adult, it’s important to focus less on the specific number and more on the nutritional value of the calories consumed, prioritizing nutrient-dense foods over ultra-processed ones.
To lose weight, aim to consume fewer calories than your maintenance calories. A safe and sustainable rate of weight loss is typically 0.5-1 pound (0.23-0.45 kg) per week, which requires a calorie deficit of about 250-500 calories per day. Spread these reduced calories evenly throughout your eating window.
Individuals need to ensure that their calorie intake during the eating window aligns with their weight loss objectives, lifestyle, and metabolic requirements. Our calorie calculator will help you determine your maintenance calories according to your activity level.
When To Eat During 16/8 Intermittent Fasting?
When it comes to 16/8 intermittent fasting schdule, there are several popular eating windows that individuals often choose to follow.
- 12 p.m. to 8 p.m.
- 9 a.m. to 5 p.m.
- 7 a.m. to 3 p.m.
- 2 p.m. to 10 p.m.
However, it’s essential to note that there’s no fixed schedule to do intermittent fasting, and individuals are encouraged to experiment with different time frames to find what works best for them.
Adjustments can be made based on lifestyle, preferences, and convenience to set an appropriate eating window.
Foods to Eat on 16/8 Intermittent Fasting
During the eating window of your 16/8 intermittent fasting meal plan, focus on nutrient-dense foods that provide essential vitamins, minerals, and macronutrients to support overall health and well-being. Here’s a list of foods to include:
Proteins:
- Lean meats such as chicken breast, turkey, and lean cuts of beef.
- Fish like salmon, trout, and mackerel, are rich in omega-3 fatty acids.
- Eggs are a versatile and protein-rich food source.
Healthy Fats:
- Avocado is known for its heart-healthy monounsaturated fats.
- Nuts and seeds like almonds, walnuts, and chia seeds, provide healthy fats and fiber.
- Olive oil, is an excellent source of monounsaturated fats and antioxidants.
Fiber-Rich Vegetables:
- Leafy greens such as spinach, kale, and Swiss chard, are packed with vitamins and minerals.
- Cruciferous vegetables like broccoli, cauliflower, and Brussels sprouts, are known for their cancer-fighting properties.
- Colorful vegetables such as bell peppers, carrots, and tomatoes, provide antioxidants and fiber.
Low-Carb Fruits (in moderation):
- Berries like strawberries, blueberries, and raspberries, are rich in antioxidants and low in sugar.
- Avocados are in healthy fats and fiber.
Whole Grains (optional):
- Quinoa is a protein-rich whole grain that’s gluten-free and high in fiber.
- Brown rice is a nutritious whole grain containing essential vitamins and minerals.
Hydrating Beverages:
- Water is the best hydrating option with zero calories.
- Herbal teas like chamomile, peppermint, and green tea, offer hydration and relaxation.
- Black coffee is a calorie-free beverage that may boost metabolism and energy levels.
Herbs and Spices:
- Fresh herbs like basil, cilantro, and parsley, add flavor and nutrients to dishes.
- Spices such as turmeric, ginger, and cinnamon are known for their anti-inflammatory properties and culinary versatility.
Dairy:
- Greek yogurt is a protein-rich dairy option that’s low in carbohydrates.
- Cheese varieties like cheddar, mozzarella, and feta, provide calcium and protein.
Including a variety of these nutrient-dense foods in your intermittent fasting meal plan can help ensure you’re meeting your nutritional needs and supporting your health goals. Remember to listen to your body’s hunger and fullness cues and make choices that align with your dietary preferences and lifestyle.
Foods to Avoid on 16/8 Intermittent Fasting
During the fasting period and even within the eating window on an intermittent fasting meal plan, it’s crucial to steer clear of certain foods that may disrupt your fasting state or hinder your health goals. Here’s a list of foods to avoid:
Processed Foods:
- Chips, crackers, and other snack foods are high in refined carbohydrates and unhealthy fats.
- Packaged convenience foods like microwave meals, instant noodles, and processed snacks.
- Sugary snacks and desserts like candy, cookies, and pastries, can spike blood sugar levels.
Highly Refined Carbohydrates:
- White bread, white rice, and other refined grains devoid of fiber and nutrients.
- Sugary cereals and breakfast pastries are loaded with added sugars and artificial ingredients.
- Sweetened beverages like soda, fruit juices, and energy drinks, can lead to weight gain and metabolic issues.
Excessive Sugars:
- Candies, chocolates, and other sweets with high sugar content can contribute to cravings and energy crashes.
- Sugary condiments and toppings like ketchup, barbecue sauce, and sweet dressings, can add unnecessary calories and sugar to meals.
Highly Processed Meats:
- Processed meats such as bacon, sausage, and deli meats contain additives, preservatives, and high sodium levels.
- Bacon with added sugars or artificial flavors, can negate the health benefits of intermittent fasting.
High-Calorie, Low-Nutrient Foods:
- Fast food items like burgers, fries, and pizza, are typically high in calories, unhealthy fats, and sodium.
- Fried foods like fried chicken, French fries, and onion rings, can contribute to weight gain and cardiovascular issues.
Alcohol:
- Alcoholic beverages like beer, wine, and co*cktails, can disrupt blood sugar levels and impair metabolic function.
- Excessive alcohol intake during the eating window can lead to poor food choices and overconsumption of calories.
Artificial Sweeteners:
- Artificial sweeteners like aspartame, sucralose, and saccharin, may stimulate appetite and cravings despite being calorie-free.
- Diet sodas and sugar-free snacks contain artificial sweeteners, which can interfere with weight loss and metabolic health.
Benefits of 16/8 Intermittent Fasting
Intermittent fasting in the 16:8 format, where individuals fast for 16 hours and eat during an 8-hour window, offers several scientifically-backed benefits:
- Weight Loss: Intermittent fasting can lead to weight loss by creating a calorie deficit, where fewer calories are consumed during the eating window. Additionally, fasting triggers hormonal changes that promote fat-burning and metabolic efficiency.[2]
- Enhanced Fat Metabolism: During fasting, the body depletes glycogen stores and shifts into a state of ketosis, where stored fat is utilized as the primary energy source. This metabolic switch enhances fat metabolism and contributes to weight loss.
- Improved Insulin Sensitivity: Intermittent fasting has been shown to improve insulin sensitivity, reducing insulin resistance and lowering blood sugar levels. This can lower the risk of type 2 diabetes and improve overall metabolic health.[3]
- Cellular Repair and Autophagy: Fasting triggers autophagy, a cellular process that removes damaged components and promotes cellular repair. This can enhance cellular resilience, support longevity, and reduce the risk of age-related diseases.[4]
- Muscle Preservation: Contrary to concerns about muscle loss, intermittent fasting aims to preserve lean muscle mass while promoting fat loss. Strategic nutrient intake during the eating window and regular resistance training can help maintain muscle mass.[5]
- Cardiovascular Health: Intermittent fasting may improve cardiovascular health by reducing risk factors such as high blood pressure, cholesterol levels, and inflammation. It may also enhance heart function and reduce the risk of heart disease.
- Cognitive Benefits: Fasting has been associated with cognitive benefits such as improved focus, clarity, and brain health. Ketones produced during fasting provide the brain with a stable energy source, supporting cognitive function and resilience.
- Longevity: Some animal studies suggest that intermittent fasting may extend lifespan by activating longevity pathways and enhancing cellular stress resistance. While human studies are limited, fasting-induced autophagy and metabolic adaptations may contribute to longevity.[6]
Overall, intermittent fasting in the 16:8 format offers numerous health benefits supported by scientific evidence. However, individual responses may vary, and consulting a healthcare professional before starting any fasting regimen is advisable, especially for individuals with underlying health conditions.
Don’t miss:
Carb Backloading Meal Plan
Pressed Coconut Water vs Regular Coconut Water
7 Day 1000 Calorie Diet Plan for Weight Loss
Dr. Nowzaradan’s 1200 Calorie Diet Plan
Risks of 16/8 Intermittent Fasting
- Hunger and cravings: During periods of reduced calorie intake or fasting, individuals may experience increased hunger as their body adjusts to the new eating pattern. This sensation is often reported in the initial days of fasting but tends to diminish as the body adapts to regular fasting periods.
- Headaches and lightheadedness: Headaches are a common side effect of fasting, typically occurring during the initial days as the body adjusts to the new eating style. Low blood sugar levels and caffeine withdrawal are potential contributors to headaches during intermittent fasting.[7]
- Digestive issues: Intermittent fasting may lead to digestive discomfort such as indigestion, diarrhea, nausea, and bloating for some individuals. Changes in diet composition and reduced food intake can affect digestion, causing these symptoms.
- Irritability and mood changes: Low blood sugar levels associated with fasting can lead to irritability, anxiety, and poor concentration in some individuals. However, these mood disturbances may diminish over time as individuals adapt to the fasting regimen.
- Fatigue and low energy: Fasting-induced fatigue and low energy levels may result from low blood sugar levels and disrupted sleep patterns. Adequate hydration and nutrient-dense food choices during eating windows can help mitigate these effects.
- Bad breath: Intermittent fasting can cause bad breath due to decreased salivary flow and increased acetone levels in the breath, resulting from fat metabolism during fasting periods.[8]
- Sleep disturbances: Some individuals may experience sleep disturbances, such as difficulty falling asleep or staying asleep, during intermittent fasting. However, the impact on sleep quality may vary among individuals, with some studies suggesting no significant effect on sleep duration or quality.
- Dehydration: During fasting, the body may release large amounts of water and salt through urine, leading to dehydration if fluid and electrolyte losses are not adequately replaced. Monitoring hydration status and maintaining adequate fluid intake is essential during fasting periods.
- Malnutrition: Prolonged or extreme fasting regimens, combined with inadequate nutrient intake, may increase the risk of malnutrition. It’s important to ensure that fasting periods are balanced with nutrient-dense meals to prevent nutritional deficiencies.
Is 16:8 Fasting Healthy?
Yes, 16/8 fasting is generally considered a healthy eating pattern that can offer various benefits. By restricting the eating window to 8 hours and fasting for the remaining 16 hours each day, individuals may naturally consume fewer calories, leading to weight loss.
Moreover, intermittent fasting has been shown to improve metabolic health markers such as insulin sensitivity and blood sugar levels, potentially reducing the risk of type 2 diabetes and cardiovascular disease. Additionally, intermittent fasting triggers cellular repair processes like autophagy, which may have anti-aging effects and support overall health.
However, it’s essential to consult with a healthcare professional before starting any fasting regimen, especially if you have underlying medical conditions or concerns. They can provide personalized guidance to ensure that intermittent fasting is safe and appropriate for you.
16/8 Intermittent Fasting Meal Plan PDF
Download the PDF template of our 16/8 intermittent fasting meal plan and keep it with you on your intermittent fasting journey.
Whether you lean towards having a printed copy for easy reference or prefer storing it conveniently on your phone, this template provides a structured guide to help you stay on track with your 16/8 intermittent fasting routine.
References
- Tagde, P., Tagde, S., Bhattacharya, T., Tagde, P., Akter, R., & Rahman, M. H. (2022). Multifaceted Effects of Intermittent Fasting on the Treatment and Prevention of Diabetes, Cancer, Obesity or Other Chronic Diseases. Current Diabetes Reviews, 18(9), 33-49. https://doi.org/10.2174/1573399818666211213103315
- CHAIR, Sek Ying; CAI, Hua; CAO, Xi∗; QIN, Yuelan; CHENG, Ho Yu; NG, Michael Timothy. Intermittent Fasting in Weight Loss and Cardiometabolic Risk Reduction: A Randomized Controlled Trial. Journal of Nursing Research 30(1):p e185, February 2022. | DOI: 10.1097/jnr.0000000000000469
- Floyd, R., Gryson, R., Mockler, D., Gibney, J., Duggan, S. N., & Behan, L. A. (2022). The Effect of Time-Restricted Eating on Insulin Levels and Insulin Sensitivity in Patients with Polycystic Ovarian Syndrome: A Systematic Review. National Journal of Endocrinology, Volume 2022, Article ID 2830545. https://doi.org/10.1155/2022/2830545
- Bagherniya, M., Butler, A. E., Barreto, G. E., & Sahebkar, A. (2018). The effect of fasting or calorie restriction on autophagy induction: A review of the literature. Ageing Research Reviews, 47, 183-197. https://doi.org/10.1016/j.arr.2018.08.004
- Sandoval, C., Santibañez, S., & Villagrán, F. (2021). Effectiveness of intermittent fasting to potentiate weight loss or muscle gains in humans younger than 60 years old: a systematic review. International Journal of Food Sciences and Nutrition, 72(6), 734–745. https://doi.org/10.1080/09637486.2020.1868412
- Strilbytska, O., Klishch, S., Storey, K. B., Koliada, A., & Lushchak, O. (2024). Intermittent fasting and longevity: From animal models to implication for humans. Ageing Research Reviews, 96, 102274. https://doi.org/10.1016/j.arr.2024.102274
- Torelli P, Manzoni GC. Fasting headache. Curr Pain Headache Rep. 2010 Aug;14(4):284-91. doi: 10.1007/s11916-010-0119-5. PMID: 20490742.
- Kapoor, U., Sharma, G., Juneja, M., & Nagpal, A. (2016). Halitosis: Current concepts on etiology, diagnosis and management. European Journal of Dentistry, 10(2), 292-300. https://doi.org/10.4103/1305-7456.178294
