Intermittent fasting tells you when to eat — but what you eat during your eating window matters just as much for results. Whether you follow a 16:8 fasting schedule, an 18:6 protocol, or even OMAD, the foods you choose determine whether you burn fat, preserve muscle, and feel energized — or end up hungry, fatigued, and plateaued.

This comprehensive intermittent fasting diet guide covers everything: the best foods to eat, what to avoid, what you can drink without breaking your fast, detailed meal plans for every schedule, macro ratios for different goals, and how to combine IF with keto or muscle building. Let's dive in.

What Is the Intermittent Fasting Diet?

Strictly speaking, intermittent fasting is not a diet — it is an eating pattern that cycles between periods of fasting and eating. Unlike traditional diets, IF does not prescribe specific foods or eliminate food groups. Instead, it controls the timing of your meals. You can learn more about the most popular schedules in our intermittent fasting schedule guide.

However, calling it "just a timing strategy" undersells the importance of food quality. Research consistently shows that what you eat during your eating window directly impacts your results. Eating 1,500 calories of processed junk food during an 8-hour window will produce vastly different outcomes than 1,500 calories of nutrient-dense whole foods. The fasting window triggers beneficial metabolic processes — autophagy, improved insulin sensitivity, increased fat oxidation — but the eating window is where you provide the raw materials your body needs to repair, build, and thrive.

In short: intermittent fasting decides when you eat, but your food choices decide your results. That is why having a solid intermittent fasting food list matters so much.

Best Foods to Eat During Intermittent Fasting

The best foods for intermittent fasting share a few key traits: they are nutrient-dense, keep you satiated for hours, stabilize blood sugar, and provide the building blocks for muscle preservation and recovery. Here is a complete intermittent fasting food list organized by category.

1. High-Quality Proteins

Protein is the single most important macronutrient during intermittent fasting. It preserves lean muscle mass during caloric deficits, keeps you full far longer than carbs or fat, and has the highest thermic effect of food (TEF) — your body burns roughly 20-30% of protein calories just digesting it. Aim for at least 0.7-1 gram of protein per pound of body weight daily.

Poultry: Chicken breast, turkey breast, ground turkey
Fish and seafood: Salmon, tuna, cod, shrimp, sardines, mackerel
Eggs: Whole eggs (great source of choline and healthy fats) and egg whites
Dairy: Greek yogurt, cottage cheese, skyr
Plant-based: Lentils, chickpeas, black beans, tofu, tempeh, edamame
Red meat (lean cuts): Sirloin steak, lean ground beef, bison

2. Healthy Fats

Healthy fats are critical during intermittent fasting because they slow gastric emptying, keeping you satisfied through longer fasting windows. They also support hormone production (including testosterone and estrogen), enhance absorption of fat-soluble vitamins (A, D, E, K), and provide sustained, steady energy without blood sugar spikes.

Avocado: Rich in monounsaturated fat, potassium, and fiber — one of the best foods for intermittent fasting
Extra-virgin olive oil: Anti-inflammatory oleocanthal, ideal for cooking and dressings
Coconut oil and MCT oil: Medium-chain triglycerides are rapidly converted to ketones for energy
Nuts: Almonds, walnuts, macadamias, pistachios, pecans — calorie-dense, so portion control matters
Seeds: Chia seeds, flaxseeds, hemp seeds, pumpkin seeds — excellent sources of omega-3s and minerals
Fatty fish: Salmon and sardines double as both protein and omega-3 fat sources
Dark chocolate (85%+): In moderation, provides antioxidants and satisfies sweet cravings

3. Complex Carbohydrates

Carbohydrates are not the enemy during intermittent fasting — but the type of carb matters enormously. Complex carbs digest slowly, provide sustained energy, feed beneficial gut bacteria, and prevent the blood sugar rollercoaster that leads to crashes and cravings. Choose carbs with a low to moderate glycemic index.

Tubers: Sweet potatoes, regular potatoes (cooled potatoes develop resistant starch, which feeds gut bacteria)
Whole grains: Brown rice, quinoa, oats, farro, barley, bulgur wheat
Whole grain bread and pasta: Look for varieties with 3+ grams of fiber per serving
Legumes: Black beans, kidney beans, lentils, chickpeas — also excellent protein sources

4. Vegetables (Non-Starchy)

Non-starchy vegetables should form the foundation of every meal during your eating window. They are incredibly low in calories but packed with fiber, vitamins, minerals, and phytonutrients. The fiber content helps you feel full and supports healthy digestion, which can sometimes slow down during fasting.

Leafy greens: Spinach, kale, arugula, Swiss chard, romaine lettuce
Cruciferous vegetables: Broccoli, cauliflower, Brussels sprouts, cabbage — contain sulforaphane, a powerful anti-cancer compound
Other vegetables: Bell peppers, tomatoes, zucchini, asparagus, mushrooms, onions, cucumbers

5. Fruits

Fruits provide natural sweetness, antioxidants, and quick energy. They are particularly good when breaking a fast because the natural sugars are easier on the digestive system than heavy meals. Prioritize low-sugar, high-fiber options.

Berries (best choice): Blueberries, strawberries, raspberries, blackberries — lowest sugar, highest antioxidants
Citrus: Oranges, grapefruit, lemons — high in vitamin C
Other fruits: Apples, bananas, kiwi, pears, watermelon

Foods to Avoid During Intermittent Fasting

While no foods are absolutely "banned" during intermittent fasting, certain foods undermine your results by spiking insulin, providing empty calories, triggering overeating, and negating the metabolic benefits you worked hard to earn during your fast. Minimize or eliminate these:

Sugary drinks: Sodas, fruit juices, sweetened coffees, energy drinks, sweet tea. These spike insulin rapidly, add hundreds of empty calories, and provide zero satiety. A single bottle of orange juice can contain as much sugar as a candy bar.
Processed and ultra-processed snacks: Chips, cookies, candy bars, crackers, packaged pastries. These are engineered to override your satiety signals and make you overeat. They combine refined carbs, unhealthy fats, and sugar — the trifecta that maximizes calorie intake while minimizing nutrition.
Refined carbohydrates: White bread, white pasta, sugary cereals, bagels, muffins. They digest extremely quickly, spike blood sugar, and leave you hungry again within an hour — the worst outcome when you have a limited eating window.
Deep-fried foods: French fries, fried chicken, onion rings, doughnuts. High in inflammatory trans fats and calories, low in micronutrients.
Alcohol: Empty calories (7 calories per gram), disrupts sleep quality, impairs fat oxidation for up to 24 hours, lowers inhibitions around food choices, and halts autophagy. If you do drink, limit to 1-2 drinks and choose lower-calorie options like dry wine or spirits.
Highly processed meats: Hot dogs, cheap sausages, bologna. High in sodium, preservatives, and fillers. Choose minimally processed options instead.
Artificial trans fats: Partially hydrogenated oils found in margarine, some baked goods, and microwave popcorn. Linked to inflammation and heart disease.

What to Drink While Fasting (Won't Break Your Fast)

Staying hydrated during your fasting window is essential — and certain beverages can actually enhance the benefits of your fast without breaking it. As a general rule, anything with zero calories and no insulin response is safe. Check our hydration during fasting guide for detailed water intake recommendations.

Water (plain or sparkling): Your primary hydration source. Add a pinch of Himalayan salt for electrolytes during longer fasts. Aim for at least 2-3 liters daily.
Black coffee: Zero calories, rich in antioxidants, and actually enhances autophagy and fat oxidation. Just drink it black — no sugar, cream, or milk. Limit to 3-4 cups to avoid cortisol spikes.
Green tea: Contains EGCG (epigallocatechin gallate), a catechin that boosts metabolism and supports autophagy. Pairs synergistically with fasting.
Herbal teas: Peppermint, chamomile, ginger, hibiscus — all zero calorie and can help manage hunger pangs.
Black tea: Mild caffeine, zero calories, contains theaflavins that support gut health.
Apple cider vinegar (diluted): 1-2 tablespoons in water. Negligible calories, may improve insulin sensitivity and aid digestion.
Electrolyte water (zero calorie): Sodium, potassium, and magnesium drops in water. Critical during longer fasts (18+ hours) to prevent headaches, dizziness, and muscle cramps.

What Breaks a Fast? (Common Questions Answered)

One of the most frequently asked questions about intermittent fasting is whether a specific food or drink "counts" as breaking your fast. The answer depends on your goal: if you are fasting for weight loss, anything under 50 calories generally will not significantly affect fat burning. If you are fasting for autophagy (cellular cleanup), even small amounts of protein or carbs can trigger mTOR and insulin, halting the process. Here is a quick reference:

Lemon water: A squeeze of lemon (under 5 calories) — does not break a fast for weight loss or autophagy purposes.
Coffee with cream or milk: Even a splash (15-30 calories) triggers an insulin response — technically breaks a fast for autophagy, but may be acceptable for weight loss if kept under 50 calories.
Diet soda / zero-calorie sweeteners: No calories, but artificial sweeteners like aspartame and sucralose may trigger a cephalic insulin response in some people. Best avoided during strict fasts.
Chewing gum: Sugar-free gum has 2-5 calories per piece — technically does not break a fast, but the chewing motion can stimulate hunger and gastric juices.
Vitamins and supplements: Fat-soluble vitamins (A, D, E, K) should be taken with food. Water-soluble vitamins (B, C) are generally fine during a fast. Gummy vitamins and capsules with fillers will break a fast.
BCAAs (branched-chain amino acids): Break a fast — they contain calories and trigger an insulin response.
Bone broth: Contains 20-50 calories per cup — technically breaks a fast, but many practitioners use it during extended fasts for electrolytes and gut support.
Medications: Always take prescribed medications as directed by your doctor, regardless of your fasting schedule. Your health comes first.

How to Break Your Fast Properly

What you eat first after a fast matters more than most people realize. After hours of fasting, your digestive system is in a rested state and your body is in a heightened state of insulin sensitivity. Breaking your fast with the wrong food can cause bloating, cramping, blood sugar spikes, and energy crashes. The longer your fast, the more important this becomes.

Best Foods to Break a Fast (Start Here)

Bone broth or vegetable soup: Warm, easy to digest, provides electrolytes and amino acids. Ideal for fasts longer than 18 hours.
Eggs (scrambled or soft-boiled): Gentle on the stomach, high in protein, easy to digest.
Avocado: Healthy fats slow glucose absorption, preventing a spike. Rich in potassium.
Greek yogurt with berries: Probiotics support digestive re-activation, protein keeps you satisfied.
Small salad with olive oil: Fiber and healthy fats gently wake up the digestive system.
Banana or soft fruit: Easy to digest, provides quick natural energy and potassium.

Foods to Avoid as Your First Meal

Large, heavy meals with 1,000+ calories — overwhelms the digestive system
Sugary foods, pastries, or candy — causes a massive blood sugar spike followed by a crash
Fried or greasy foods — difficult to digest on an empty stomach
Raw cruciferous vegetables in large quantities — can cause gas and bloating
Dairy in large amounts (if sensitive) — many people experience bloating when breaking a fast with milk or cheese

The 15-Minute Rule

A practical approach: eat a small, gentle "pre-meal" (200-300 calories) to break your fast, wait 15-20 minutes, then eat your full meal. This gives your digestive enzymes time to activate and prevents the discomfort of going from zero to a large meal instantly.

Sample Intermittent Fasting Meal Plans

Here are complete meal plans for the three most popular intermittent fasting schedules. Each plan targets approximately 1,500-1,800 calories for moderate weight loss. Adjust portions based on your TDEE (total daily energy expenditure) and use our calorie calculator to find your ideal daily intake.

16:8 Meal Plan (Eating Window: 12:00 PM - 8:00 PM)

The most popular 16:8 schedule gives you a comfortable 8-hour eating window for 2-3 meals and a snack.

Meal 1 — Break the fast (12:00 PM): 2 scrambled eggs with sauteed spinach and half an avocado on one slice of whole grain toast. Side of mixed berries (1/2 cup). ~500 calories, 30g protein, 28g fat, 35g carbs.

Snack (3:00 PM): Handful of almonds (1 oz) and a medium apple. ~250 calories, 7g protein, 14g fat, 28g carbs.

Meal 2 — Main meal (6:30 PM): Grilled salmon fillet (6 oz) with roasted sweet potato (1 medium) and steamed broccoli (1 cup). Drizzle of extra-virgin olive oil. ~650 calories, 42g protein, 25g fat, 55g carbs.

Light snack (7:30 PM, optional): Greek yogurt (3/4 cup) with a teaspoon of honey and a sprinkle of chia seeds. ~180 calories, 15g protein, 3g fat, 22g carbs.

Daily total: ~1,580 calories | 94g protein | 70g fat | 140g carbs

18:6 Meal Plan (Eating Window: 1:00 PM - 7:00 PM)

The 18:6 schedule compresses your window to 6 hours — ideal for 2 larger meals.

Meal 1 — Break the fast (1:00 PM): Large salad with grilled chicken breast (6 oz), mixed greens, cherry tomatoes, cucumber, red onion, feta cheese (1 oz), and olive oil + lemon dressing. Side of hummus (2 tbsp) with carrot sticks. ~650 calories, 48g protein, 30g fat, 40g carbs.

Meal 2 — Main meal (6:00 PM): Lean ground turkey stir-fry (6 oz) with bell peppers, zucchini, mushrooms, and snap peas over brown rice (3/4 cup cooked). Sauce: soy sauce, garlic, ginger. Side of edamame (1/2 cup). ~750 calories, 52g protein, 22g fat, 75g carbs.

Small snack (6:45 PM, optional): Dark chocolate (1 square, 85% cacao) and a handful of walnuts. ~200 calories, 5g protein, 16g fat, 10g carbs.

Daily total: ~1,600 calories | 105g protein | 68g fat | 125g carbs

OMAD Meal Plan (One Meal a Day — Eating Window: ~1 hour)

OMAD requires careful planning to hit your nutritional targets in a single meal. This is an advanced approach — make sure you are comfortable with 18:6 before attempting it.

The Meal (6:00 PM): 8 oz grilled ribeye steak (or salmon) with compound herb butter (1 tbsp). Large baked potato with skin, topped with sour cream (2 tbsp) and chives. Massive side salad: mixed greens, avocado (whole), cherry tomatoes, red onion, pumpkin seeds (1 oz), olive oil dressing. Steamed asparagus (1 cup). Dessert: Greek yogurt (1 cup) with mixed berries, honey, and granola (2 tbsp). ~1,700 calories | 95g protein | 85g fat | 130g carbs

Pro tip: With OMAD, consider a multivitamin and electrolyte supplement to cover any micronutrient gaps. Eating your entire daily nutrition in one sitting is challenging — use FastFlow AI to scan your meal and verify you are hitting your protein and calorie targets.

Macronutrient Ratios for Different Goals

Your ideal macronutrient split during intermittent fasting depends on your primary goal. Use these as starting points and adjust based on how your body responds. Our calorie calculator can help you determine your baseline caloric needs.

For Weight Loss

Protein: 35-40% of calories — high protein preserves muscle during a deficit and keeps you satiated
Fat: 30-35% of calories — supports hormones and satiety
Carbs: 25-35% of calories — lower carbs can enhance fat oxidation, but don't go so low that you lose energy for workouts
Calorie deficit: 300-500 calories below your TDEE

For Muscle Gain

Protein: 30-35% of calories (minimum 1g per pound of body weight)
Fat: 25-30% of calories
Carbs: 35-45% of calories — you need carbs to fuel intense workouts and support muscle glycogen replenishment
Calorie surplus: 200-300 calories above your TDEE

For Maintenance

Protein: 25-30% of calories
Fat: 30-35% of calories
Carbs: 35-45% of calories
Calories: At or near your TDEE

Intermittent Fasting and Keto: Can You Combine Them?

Yes — and for many people, combining intermittent fasting and keto is one of the most effective strategies for rapid fat loss. Both approaches push your body toward the same metabolic state: fat-adapted ketosis, where your body preferentially burns fat (and ketones) for fuel instead of glucose.

During a standard fast, your liver glycogen stores deplete after roughly 12-16 hours, triggering ketone production. A ketogenic diet (very low carb, high fat) keeps you in ketosis even during your eating window. When you combine the two, you spend more total hours per day in a fat-burning state.

How to Do IF + Keto

Macros: 70-75% fat, 20-25% protein, 5-10% carbs (under 20-50g net carbs per day)
Schedule: 16:8 or 18:6 works best. OMAD can be difficult because getting enough fat and calories in one meal is challenging.
Keto staple foods: Avocado, fatty fish (salmon, sardines), eggs, cheese, nuts, olive oil, coconut oil, butter, leafy greens, cruciferous vegetables
Watch out for: "Keto flu" symptoms (headache, fatigue, irritability) during the first week — increase sodium, potassium, and magnesium intake

Who Should Avoid IF + Keto

This combination is intense. Avoid it if you are new to both IF and keto (start with one at a time), have a history of eating disorders, are pregnant or breastfeeding, or have kidney or liver conditions. Always consult a healthcare provider before starting.

Intermittent Fasting and Muscle Building

A common concern is that intermittent fasting causes muscle loss. The evidence suggests this is not the case — as long as you eat enough protein, train with resistance exercises, and manage your calorie intake properly. Several studies have shown that IF can preserve lean mass equally well as traditional meal timing, and some research indicates it may even improve body composition (lower fat, maintain muscle) when combined with strength training.

Protein Timing During IF

Total daily protein is king: Aim for 0.8-1.2g per pound of body weight. Distribute it relatively evenly across your meals during the eating window (e.g., 40-50g per meal for a 180-pound person eating 2-3 meals).
Post-workout meal: If you train fasted (during your fasting window), schedule your eating window to start soon after your workout. Your first meal should be protein-rich (40-50g).
Pre-sleep protein: If your eating window allows it, a casein-rich food (cottage cheese, Greek yogurt) before your last meal can provide slow-digesting protein overnight.

Workout Nutrition Strategies

Fasted training (morning): Black coffee 30 minutes before, break fast immediately after with a high-protein meal.
Fed training (afternoon): Train 2-3 hours after your first meal, then eat a large protein-rich second meal after training.
Creatine: 3-5g daily — take it with your first meal. Creatine does not break a fast, but it absorbs better with food.

Supplements During Intermittent Fasting

Navigating supplements during fasting can be confusing. Here is a clear breakdown of what is safe during your fasting window and what should wait until your eating window.

Safe During a Fast (Won't Break It)

Electrolytes: Sodium, potassium, magnesium — zero calories, essential during longer fasts
Water-soluble vitamins: Vitamin C, B-complex — zero calories, though some people experience nausea on an empty stomach
Creatine monohydrate: Zero calories, does not trigger insulin (but absorbs better with food)
Black coffee / caffeine pills: May enhance fasting benefits
Probiotics: Most are calorie-free and may actually work better on an empty stomach

Take During Your Eating Window (Will Break a Fast)

Fat-soluble vitamins (A, D, E, K): Need dietary fat for absorption — always take with a meal
Fish oil / omega-3 capsules: Contain fat and calories
Protein powder / BCAAs: Contain calories and amino acids that trigger insulin and mTOR
Gummy vitamins: Contain sugar and calories
Iron supplements: Absorb better with food and vitamin C, and can cause nausea on an empty stomach
Collagen peptides: Protein-based, will break a fast
Multivitamins: Many contain fat-soluble vitamins and fillers — best with food

Common Nutrition Mistakes During Intermittent Fasting

Even experienced fasters make these nutrition errors. Avoiding them can be the difference between stalling and seeing consistent results.

Mistake #1: Overeating during your eating window. The most common mistake by far. Fasting does not give you a license to eat whatever you want in unlimited quantities. A caloric surplus is a caloric surplus — whether you eat it in 8 hours or 16. Track your calories, at least initially, to build awareness.
Mistake #2: Not eating enough protein. Many fasters fill up on carbs and fats and neglect protein. This leads to muscle loss, reduced metabolism, and poor satiety. Aim for at least 30g of protein per meal.
Mistake #3: Breaking your fast with junk food. After hours of fasting, your body is primed to absorb nutrients efficiently. Feeding it processed food, sugar, or refined carbs first is a wasted opportunity — and causes bigger blood sugar spikes than if you ate the same food in a fed state.
Mistake #4: Not drinking enough water. Dehydration is often mistaken for hunger. Many people undereat water during fasting windows because they are used to getting hydration from food. Aim for 2-3 liters minimum. See our fasting hydration guide for details.
Mistake #5: Ignoring micronutrients and electrolytes. With a compressed eating window, it is easy to miss out on key vitamins and minerals. Eat a variety of colorful vegetables, consider a multivitamin, and supplement electrolytes (especially sodium, potassium, and magnesium) during longer fasts.
Mistake #6: Drinking calories during the fast. A "small" latte with milk has 100-200 calories. A smoothie has 300+. Many people unknowingly break their fast with drinks. Stick to water, black coffee, and unsweetened tea.
Mistake #7: Eating too little (extreme restriction). Some people combine intermittent fasting with severe calorie restriction (under 1,000 calories). This tanks your metabolism, causes muscle loss, leads to nutrient deficiencies, and is unsustainable. IF should complement a reasonable caloric deficit, not amplify an extreme one.
Mistake #8: Not planning meals in advance. If you do not have food prepared when your eating window opens, you are far more likely to grab whatever is convenient — which is usually processed food. Meal prep is your best friend.

Frequently Asked Questions

What can I eat during intermittent fasting?

You can eat anything during your eating window, but for best results, focus on nutrient-dense whole foods: lean proteins (chicken, fish, eggs), healthy fats (avocado, olive oil, nuts), complex carbohydrates (sweet potatoes, brown rice, oats), and plenty of vegetables and fruits. The key is to prioritize food quality and hit your protein targets.

What is the best intermittent fasting food list?

The ideal intermittent fasting food list includes: eggs, chicken breast, salmon, Greek yogurt, avocado, olive oil, nuts and seeds, sweet potatoes, brown rice, quinoa, leafy greens, broccoli, berries, and legumes. These foods are nutrient-dense, high in protein and fiber, and keep you feeling full throughout your fasting window.

Will coffee break my fast?

Black coffee will not break your fast. It has virtually zero calories and may actually enhance fasting benefits by boosting autophagy, increasing fat oxidation, and suppressing appetite. However, adding cream, milk, sugar, or flavored syrups will break your fast. Even a small splash of cream (15-30 calories) triggers an insulin response.

What are the best foods to break a fast?

The best foods to break a fast are gentle, easy-to-digest options: bone broth, scrambled eggs, avocado, Greek yogurt with berries, a small salad with olive oil dressing, or a banana. Avoid heavy, greasy, or sugary foods as your first meal. After eating a small break-fast snack, wait 15-20 minutes before consuming your full meal.

Can I do intermittent fasting and keto at the same time?

Yes, intermittent fasting and keto complement each other well. Both promote fat adaptation and ketone production. Combining them can accelerate fat loss and deepen ketosis. Start with one approach first, get comfortable, then add the other. A 16:8 or 18:6 schedule works best with keto. Focus on high-fat, moderate-protein, very low-carb foods during your eating window.

How much protein do I need during intermittent fasting?

Aim for 0.7-1.2 grams of protein per pound of body weight daily, depending on your activity level and goals. For a 160-pound person, that is 112-192 grams per day. Distribute protein relatively evenly across your meals (30-50g per meal). Protein is essential for preserving muscle mass, especially when eating at a caloric deficit.

Do supplements break a fast?

It depends on the supplement. Zero-calorie supplements like electrolytes, water-soluble vitamins (B, C), creatine, and probiotics generally do not break a fast. Supplements that contain calories — protein powder, BCAAs, fish oil, gummy vitamins, and collagen peptides — will break your fast and should be taken during your eating window. Fat-soluble vitamins (A, D, E, K) should always be taken with food for proper absorption.

What is the best intermittent fasting meal plan for weight loss?

For weight loss, the 16:8 method with 2-3 meals during your eating window is the most sustainable approach. Focus on high protein (35-40% of calories), moderate healthy fats (30-35%), and complex carbs (25-35%). Create a 300-500 calorie deficit below your TDEE. A typical day might look like: eggs with avocado and vegetables for meal one, a lean protein with complex carbs and greens for meal two, and a protein-rich snack to end the window.

How many calories should I eat during intermittent fasting?

Intermittent fasting does not change your caloric needs — it changes when you eat those calories. Use our calorie calculator to determine your baseline needs. For weight loss, eat 300-500 calories below your TDEE. For muscle gain, eat 200-300 above. The eating window simply compresses when you consume those calories. Track your intake with an app like FastFlow AI to ensure you are hitting your targets.

How FastFlow AI Tracks Your Nutrition

Knowing what to eat during intermittent fasting is only half the battle — consistently tracking it is the other half. That is exactly what FastFlow AI was built for.

FastFlow AI combines fasting tracking, calorie and macro logging, and hydration monitoring into a single, free app. Its standout feature is the AI-powered food scanner — simply take a photo of your meal, and the AI instantly estimates calories, protein, carbs, and fat. No manual entry, no searching through databases, no guessing portion sizes.

The app also includes an AI nutrition coach that can answer your questions about what to eat, suggest meals based on your goals, and help you stay on track with personalized advice. Whether you are following 16:8, 18:6, or OMAD, FastFlow AI tracks your fasting zones in real-time and shows you exactly when you enter fat-burning and autophagy states.

Combined with water tracking (so you never forget to hydrate during your fast) and weight trend analysis, FastFlow AI gives you a complete picture of your intermittent fasting journey — from timing to nutrition to results.

Download FastFlow AI free on Google Play and take the guesswork out of your intermittent fasting diet.