Nutrition Plan Generator
Generates a personalized weekly meal plan with calories, macros, shopping list, and prep tips.
Example run
Generated by Claude Opus 5.5 on September 23, 2026
Inputs used
- Age and gender
- 34-year-old male
- Height and weight
- 5'10" (178 cm), 190 lbs (86 kg)
- Activity level
- Moderately active — desk job plus strength training 4x/week (45-60 min sessions) and ~8,000 steps/day
- Primary goal
- Lose fat while preserving muscle — aiming for about 1 lb (0.45 kg) per week loss
- Dietary pattern
- Pescatarian (fish and seafood, no other meat or poultry)
- Allergies and restrictions
- Tree nut allergy (especially cashews and almonds); mild lactose intolerance (can tolerate small amounts of hard cheese and yogurt)
- Disliked foods
- Mushrooms, olives, and cilantro
- Cooking time
- About 30-40 minutes on weeknights; up to 90 minutes on weekends for batch cooking
- Budget level
- Moderate — roughly $90-110 per week for one adult
- Meals per day
- 3 meals plus 1-2 snacks
Your Pescatarian Fat-Loss Plan (Muscle-Preserving)
This plan targets about 1 lb per week of fat loss while keeping protein high enough to protect the muscle you're building 4x/week. It is tree-nut-free, low in lactose, and contains no mushrooms, olives, or cilantro.
1. Daily Targets
Energy Estimate
| Step | Calculation | Result |
|---|---|---|
| BMR (Mifflin-St Jeor, male) | (10 × 86 kg) + (6.25 × 178 cm) − (5 × 34) + 5 | ≈ 1,810 kcal |
| Maintenance (TDEE) | 1,810 × 1.55 (moderately active) | ≈ 2,800 kcal |
| Fat-loss deficit | −500 kcal/day (≈ 3,500 kcal/week ≈ 1 lb) | ≈ 2,300 kcal/day |
Assumptions:
- A 1.55 multiplier fits a desk job, 4 lifting sessions, and about 8k steps.
- The "3,500 kcal = 1 lb" rule is an approximation. Real loss varies with water, glycogen, and adaptation.
- Formula estimates can be off by ±10%. Your scale trend is the real test.
How to adjust:
- Track your weekly average weight.
- After 2–3 weeks, adjust by 150–200 kcal/day if you're losing less than 0.5 lb/week or more than 1.5 lb/week.
Macronutrient Targets
| Macro | Grams | Calories | % of Total | Rationale |
|---|---|---|---|---|
| Protein | 180 g | 720 | 31% | ~2.1 g/kg to preserve muscle in a deficit |
| Carbohydrate | 240 g | 960 | 42% | Fuels lifting and recovery |
| Fat | 70 g | 630 | 27% | Supports hormones; emphasizes fish, seeds, olive oil, avocado |
| Total | — | ~2,310 | 100% |
Also aim for:
- Fiber: 30–38 g/day
- Fatty fish: 2–3 servings/week for omega-3s
Timing tip: Put a protein-rich meal or snack within a few hours before or after training. Spread protein across 4–5 eating occasions (30–50 g each).
2. Recipe Key (Simple, Repeatable Meals)
Portions are for one serving. Calories and protein are approximate.
Breakfasts
B1 – Protein Overnight Oats — 600 kcal / 50 g P
- 60 g rolled oats
- 170 g plain nonfat Greek yogurt (lactose-free if needed)
- 1 scoop whey isolate
- 120 ml lactose-free milk
- 1 tbsp chia
- 1 cup berries
B2 – Veggie Egg Scramble — 560 kcal / 45 g P
- 2 eggs plus 1 cup liquid egg whites
- Spinach and bell pepper, cooked in 1 tsp olive oil
- 2 slices whole-grain toast
- 1 orange
B3 – Egg Muffins + English Muffin — 600 kcal / 36 g P
- 3 batch egg muffins (eggs, whites, spinach, peppers, parmesan)
- 1 whole-wheat English muffin with 1 tbsp peanut butter
- 1 banana
Lunches
L1 – Tuna, White Bean & Quinoa Bowl — 610 kcal / 44 g P
- 1 can (5 oz) light tuna
- ½ can cannellini beans
- 1 cup cooked quinoa
- Cucumber, tomato, and parsley
- Dressing: 1 tbsp olive oil plus lemon
L2 – Red Lentil & Spinach Soup — 580 kcal / 43 g P
- 2 cups batch soup
- Topped with 170 g Greek yogurt (or served on the side)
- 1 slice sourdough
L3 – Leftovers from the previous night's dinner.
L4 – Salmon Salad Wrap — 640 kcal / 42 g P
- 1 can salmon mixed with 2 tbsp Greek yogurt, mustard, and lemon
- 1 large whole-wheat wrap with greens
- Baby carrots with 2 tbsp hummus
Dinners
D1 – Sheet-Pan Salmon — 630 kcal / 42 g P
- 6 oz salmon
- 200 g sweet potato
- 2 cups broccoli
- 2 tsp olive oil
- Paprika, garlic, and lemon
D2 – Garlic-Ginger Shrimp Stir-Fry — 610 kcal / 42 g P
- 6 oz shrimp
- 2 cups frozen stir-fry vegetables
- 1 cup cooked brown rice
- Sauce: low-sodium soy sauce, ginger, garlic, and 1 tbsp sesame oil
- Cook 2 portions (one for lunch the next day).
D3 – Cod Tacos — 560 kcal / 40 g P
- 6 oz cod with chili-lime seasoning
- 3 corn tortillas
- Cabbage slaw with a Greek yogurt–lime sauce
- ½ cup black beans
- ¼ avocado
D4 – Tofu-Chickpea Tomato Curry — 690 kcal / 42 g P
- 200 g extra-firm tofu
- ½ cup chickpeas
- Crushed tomatoes, spinach, and curry spices
- ¾ cup cooked rice
- Cook 2 portions.
D5 – Shrimp Marinara Pasta — 560 kcal / 46 g P
- 4 oz shrimp
- 85 g dry chickpea or lentil pasta
- Marinara and spinach
- 10 g parmesan
D6 – Lemon Baked Cod — 560 kcal / 45 g P
- 6 oz cod
- 250 g roasted potatoes
- Green beans
- Yogurt-dill sauce
- 2 tsp olive oil
Snacks
| Code | Snack | kcal | Protein |
|---|---|---|---|
| S1 | Greek yogurt (170 g), berries, 1 tbsp pumpkin seeds | 200 | 21 g |
| S2 | Apple with 2 tbsp peanut butter | 290 | 8 g |
| S3 | 1 cup shelled edamame (microwaved, salted) | 190 | 17 g |
| S4 | Shake: whey isolate, banana, 1 cup lactose-free milk | 315 | 34 g |
| S5 | 2 hard-boiled eggs, baby carrots, 2 tbsp hummus | 250 | 14 g |
3. 7-Day Meal Plan
| Day | Breakfast | Snack 1 | Lunch | Snack 2 | Dinner | ≈ kcal / Protein |
|---|---|---|---|---|---|---|
| Mon | B1 Protein Overnight Oats | S5 Eggs, carrots & hummus | L1 Tuna-Bean-Quinoa Bowl | S1 Yogurt & berries | D1 Sheet-Pan Salmon | 2,290 / 171 g |
| Tue | B2 Veggie Egg Scramble | S3 Edamame | L2 Red Lentil Soup | S4 Protein shake (post-workout) | D2 Shrimp Stir-Fry (make 2) | 2,255 / 181 g |
| Wed | B1 Protein Overnight Oats | S3 Edamame | L3 Leftover Shrimp Stir-Fry | S1 Yogurt & berries | D3 Cod Tacos | 2,160 / 170 g |
| Thu | B3 Egg Muffins + English Muffin | S1 Yogurt & berries | L2 Red Lentil Soup | S4 Protein shake (post-workout) | D4 Tofu-Chickpea Curry (make 2) | 2,385 / 176 g |
| Fri | B2 Veggie Egg Scramble | S3 Edamame | L3 Leftover Tofu Curry | S1 Yogurt & berries | D5 Shrimp Marinara Pasta | 2,200 / 171 g |
| Sat | B3 Egg Muffins + English Muffin | S1 Yogurt & berries | L4 Salmon Salad Wrap | S4 Protein shake (post-workout) | D1 Sheet-Pan Salmon | 2,385 / 175 g |
| Sun | B1 Protein Overnight Oats | S2 Apple & peanut butter | L1 Tuna-Bean-Quinoa Bowl | S1 Yogurt & berries | D6 Lemon Baked Cod | 2,260 / 168 g |
Weekly average: ~2,275 kcal and ~173 g protein per day.
- This is on target, and the small day-to-day swings are normal.
- On training days, you can move the shake (S4) to directly after your session.
- If you're hungrier on lifting days, add a piece of fruit.
4. Shopping List
Estimated cost is ~$95–110 in week 1. Long-lasting staples (protein powder, spices, oils, seeds) will make later weeks cheaper, often around $80–95.
Protein
- Frozen salmon fillets, 12 oz (2 × 6 oz)
- Frozen cod fillets, 12 oz
- Frozen raw shrimp, peeled, 2 lb bag
- Canned light tuna, 2 × 5 oz (lower mercury than albacore)
- Canned salmon, 1 × 5–6 oz
- Eggs, 18-count
- Liquid egg whites, 32 oz carton
- Extra-firm tofu, 1 block (14–16 oz)
- Frozen shelled edamame, 12–16 oz bag
Dairy / Alternatives
- Plain nonfat Greek yogurt, ~64 oz total (lactose-free versions are widely available)
- Lactose-free milk, ½ gallon
- Parmesan, small wedge (aged hard cheese is naturally very low in lactose)
- Whey protein isolate, 1 tub (lower in lactose than concentrate; lasts several weeks)
Produce
- Frozen mixed berries (large bag)
- 3 bananas, 1–2 apples, 2 oranges
- 2 lemons, 2 limes
- Spinach (large tub)
- 3 bell peppers
- 2 onions, 1 head garlic, fresh ginger
- Broccoli, 2 heads (or frozen)
- 2 sweet potatoes, 1 lb potatoes
- Green beans
- 1 cucumber, 2 tomatoes
- Baby carrots
- Coleslaw mix or ½ cabbage
- 1 avocado
- 1 bunch parsley
- Fresh dill (optional)
- Frozen stir-fry vegetables, 2 bags
Pantry
- Rolled oats
- Chia seeds
- Pumpkin seeds
- Peanut butter
- Quinoa
- Brown rice
- Red lentils, 1 lb
- Canned beans: cannellini, chickpeas, black beans
- Crushed tomatoes, 2 × 28 oz
- Marinara, 1 jar (check that it's pesto-free)
- Chickpea or lentil pasta
- Low-sodium vegetable broth
- Low-sodium soy sauce
- Olive oil, sesame oil, mustard
Bread & Grains
- Whole-grain bread (or sourdough)
- Whole-wheat English muffins
- Large whole-wheat wraps
- Corn tortillas
Other
- Hummus (small tub)
- Spices: cumin, curry powder or garam masala, smoked paprika, chili powder, garlic powder, dried dill
Tree-nut label check: Read labels on granola, protein powder, bread, crackers, energy bars, and sauces. Watch for "may contain tree nuts" or "processed in a facility with" warnings. Avoid pesto (pine nuts, often cashews or almonds), almond milk, and "mixed nut" products. Peanuts are legumes, but cross-contact is common, so confirm with your allergist that peanut butter is safe for you.
5. Meal Prep Plan
Sunday Batch Session (~90 min)
Work on several items at once:
- Grains: Cook 3 cups dry brown rice and 1 cup dry quinoa at the same time. Portion them into containers.
- Soup: Make 4 servings of red lentil soup (onion, garlic, cumin, crushed tomatoes, red lentils, broth, and spinach stirred in at the end). Refrigerate 2 portions for Tue and Thu, and freeze 2 for next week.
- Egg muffins: Bake 12 (enough for 2 weeks). Refrigerate 6 and freeze 6.
- Hard-boiled eggs: Boil 4.
- Prep for later: Chop peppers, onions, and cucumber, and shred the slaw.
Tips to Save Time
- Overnight oats in rotation. Make 2 jars on Sunday night (Mon, Wed) and 1 on Saturday night (Sun). They keep 3–4 days refrigerated.
- Cook once, eat twice. The stir-fry (Tue) and curry (Thu) are doubled on purpose. Pack the lunch portion right away, before serving dinner.
- Thaw fish the night before. Move salmon or cod from the freezer to the fridge the evening before. With that done, weeknight dinners take 20–30 minutes.
- Know your storage limits:
- Cooked fish: 2–3 days
- Rice, quinoa, and soup: 4 days in the fridge, or 2–3 months frozen
- Egg muffins: 4 days in the fridge, or 2 months frozen
6. Hydration & Swaps
Hydration
- Baseline: About 3 liters/day of fluids (water, tea, coffee, lactose-free milk). Food provides additional water.
- Training days: Add 500–750 ml per hour of lifting, sipped before, during, and after.
- Easy check: Aim for pale-yellow urine and minimal thirst.
- Why it helps: Good hydration makes the deficit easier, since thirst often feels like hunger.
Easy Swaps
Pescatarian swaps
- Fresh salmon → canned salmon, sardines, or frozen trout. These are cheaper and still rich in omega-3s.
- Fish or shrimp → tofu, tempeh, or eggs on any night. Keep the portion around 30–40 g protein.
Tree-nut-free swaps
- Almond milk → lactose-free milk, soy milk, or oat milk. Soy has the most protein.
- Nut snacks → pumpkin seeds, sunflower seeds, or roasted chickpeas.
- Store-bought pesto → homemade basil-sunflower-seed pesto with parmesan, garlic, lemon, and olive oil.
Lactose-friendly swaps
- Regular milk or yogurt → lactose-free versions or soy yogurt.
- Soft cheeses → aged cheeses such as parmesan or aged cheddar.
- Lactase tablets can help on meals out.
Dislike-proofing: Parsley or basil replaces cilantro in tacos and bowls. None of the recipes use mushrooms or olives.
7. Optional Add-ons (General Information Only)
These are commonly considered supplements. None are required, and none replace food.
- Protein powder (whey isolate, or pea/soy if dairy bothers you): a convenient way to reach 180 g of protein.
- Creatine monohydrate: One of the most researched supplements for strength training. It's commonly used at 3–5 g/day.
- Vitamin D: Often considered if sun exposure is limited. A blood test can show whether you need it.
- Omega-3 (fish oil or algae oil): Only relevant on weeks with fewer than 2 fatty-fish meals.
- Calcium: Worth considering if total dairy or fortified foods are low. Yogurt, lactose-free milk, tofu, and canned salmon with bones already help here.
Keys to success: Consistent protein at every meal, progressive overload in the gym, 7–9 hours of sleep, and patience with the weekly trend. You've got this! 💪
Please consult a doctor or registered dietitian before making major dietary changes, especially if you have medical conditions, are pregnant, or take medications — and confirm your food-allergy precautions with your allergist.
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