Most men starting a fitness journey focus almost entirely on training and treat nutrition as an afterthought. This is backwards. Training provides the stimulus for change; nutrition provides the raw materials and energy to make that change happen. Getting both right is what produces results. Getting only one right produces frustration.
The Three Numbers That Matter
Nutrition for fitness comes down to three numbers. Everything else is detail.
1. Total calories
The master variable. Too many and you gain fat. Too few and you lose muscle alongside fat. The right amount depends on your goal — see the targets below.
2. Protein
The most important macronutrient for men training. Protein builds and repairs muscle tissue, blunts hunger, and has a higher thermic effect than carbohydrates or fat (your body burns more calories digesting it). Target: 1.8–2.2g per kg of bodyweight per day.
At 80kg: 144–176g protein per day. This is the non-negotiable variable.
3. Calorie timing relative to training
Less important than most people think, but having a protein-containing meal within 2 hours after training supports muscle protein synthesis. Don't overthink meal timing until calories and protein are consistently on target.
Calorie Targets for UK Men by Goal
To build muscle (lean bulk): Bodyweight in kg × 33–36, plus 200–400 calories.
- 80kg man: 80 × 35 = 2,800 + 300 = ~3,100 calories/day
To lose fat (cut): Bodyweight in kg × 30–33, minus 400–500 calories.
- 80kg man: 80 × 32 = 2,560 – 450 = ~2,110 calories/day
To maintain / body recompose: Bodyweight in kg × 30–33.
- 80kg man: 80 × 32 = ~2,560 calories/day
Protein target stays the same regardless of phase: 1.8–2.2g/kg.
The Best Protein Sources for UK Men
Ranked by protein per pound and practical usability in a UK context:
| Food | Protein per 100g | Approx UK cost | Notes |
|---|---|---|---|
| Chicken breast | 31g | £5–6/kg (Aldi/Lidl) | Versatile, lean, batch-cook well |
| Tuna (tinned) | 25g | £0.50/tin | Fastest high-protein option |
| Eggs | 13g | £1.89/12 (Aldi) | Cheap, calorie-dense, versatile |
| Cottage cheese | 11g | £1/300g | High protein, low calorie |
| Greek yoghurt | 9–10g | £1.25/500g | Good for breakfast/snacks |
| Turkey mince | 28g | £2.50/500g (Tesco) | Lean, works as mince substitute |
| Salmon fillet | 22g | £2/fillet (Aldi) | Good fats, high protein |
| Chicken thighs | 24g | £3.50/kg (Lidl) | Cheaper than breast, more flavourful |
| Whey protein | 80g per 100g | £25–35/kg | Supplement — useful not essential |
| Red lentils | 9g cooked | £0.85/500g dry | Plant-based, cheap, high fibre |
Hitting 160–180g protein per day from whole foods is achievable on £30–40 per week from UK supermarkets.
A Day of Eating at 2,800 Calories / 160g Protein
This example suits an 80kg man in a lean bulk phase. Adjust calories for your goal.
Breakfast (650 cal / 45g protein)
- 4 whole eggs scrambled
- 2 slices wholegrain toast
- 250ml whole milk
- 1 banana
Lunch (750 cal / 50g protein)
- 200g cooked chicken breast (batch cooked)
- 200g cooked rice
- Large mixed salad with olive oil dressing
- 1 apple
Pre/Post training snack (400 cal / 30g protein)
- 300g Greek yoghurt
- 40g oats
- 30g mixed nuts
Dinner (800 cal / 55g protein)
- 250g salmon fillet (oven baked)
- 250g sweet potato
- Large portion of broccoli and green beans
- 1 tbsp olive oil in cooking
Evening snack (200 cal / 25g protein)
- 200g cottage cheese
- Handful of cherry tomatoes
Total: ~2,800 calories, ~205g protein
Carbohydrates and Fats: The Supporting Cast
Once protein and calories are in place, the split between carbohydrates and fat is largely personal preference. Both are necessary — neither should be eliminated.
Carbohydrates are the primary fuel for resistance training. Low carb intake reduces training performance and recovery. Good UK sources: oats, rice, sweet potatoes, wholegrain bread, pasta, fruit.
Fats support testosterone production, joint health, and absorption of fat-soluble vitamins. Minimum 0.8–1g per kg bodyweight. Good UK sources: eggs, salmon, olive oil, nuts, avocado.
The British Nutrition Foundation guidance recommends a balanced macronutrient intake for active adults — avoiding fat or carbohydrate restriction unless medically indicated.
Supplements Worth Considering (And What to Skip)
Worth it:
- Creatine monohydrate — The most evidence-backed supplement for strength and muscle gain. 3–5g per day. Costs approximately £15–20 for a 3-month supply. Take it daily, timing doesn't matter.
- Whey protein — Useful if you struggle to hit protein from food. Not necessary if you can hit your target from meals.
- Vitamin D — Most UK adults are deficient, particularly October–April. The NHS recommends 10 micrograms (400 IU) daily for general population. Active men may benefit from higher amounts.
Skip:
- Pre-workouts beyond caffeine
- Testosterone boosters
- Fat burners
- BCAAs (redundant if protein intake is adequate)
- Most "mass gainer" products (expensive way to consume calories, usually low protein relative to carb content)
Making This Practical
Batch cook weekly. 500g chicken, a large pot of rice, 8 hard-boiled eggs, and chopped vegetables on Sunday covers most of the week's lunches in 90 minutes.
Keep protein sources visible. Stock the fridge at eye level with Greek yoghurt, cottage cheese, and cooked chicken. The path of least resistance determines what you eat when you're tired.
Track for 2–4 weeks, then estimate. You don't need to count calories forever. A few weeks of accurate tracking builds an intuition for portion sizes and food composition that you carry forward.
How Milo Handles Your Nutrition
Milo calculates your calorie and protein targets based on your stats and goal, then generates a weekly meal plan that hits those numbers using UK supermarket foods. No spreadsheets, no guesswork.
Start your 7-day free trial — from £7.99/month.
Frequently Asked Questions
How much protein does a man need to build muscle in the UK?
1.8–2.2g of protein per kg of bodyweight per day is the evidence-based range for men actively building muscle. For an 80kg man, this is 144–176g of protein per day from sources like chicken, eggs, Greek yoghurt, and tinned fish.
How many calories should a man eat to build muscle without getting fat?
Eat 200–400 calories above your Total Daily Energy Expenditure (TDEE). For a moderately active 80kg man this is approximately 3,000–3,100 calories per day. Aim to gain no more than 0.25–0.5kg per week.
Do men need supplements to build muscle?
No. Creatine monohydrate is the only supplement with strong evidence for strength and muscle gains, but it's an enhancement not a requirement. Whole food protein sources (chicken, eggs, fish, dairy) are sufficient to hit protein targets without protein powder.
What should men eat before and after the gym?
Eat a meal containing protein and carbohydrates 1–2 hours before training. Have a protein-containing meal or snack within 2 hours after. The specific timing matters less than hitting total daily protein and calorie targets.
Is meal prep necessary for men trying to build muscle?
Not strictly necessary, but significantly helpful. Batch cooking protein sources on Sundays removes the daily decision of what to eat and makes hitting calorie and protein targets much more consistent.
Related guides:
- Beginner Workout Plans for Men UK — The training programme to match your nutrition
- Bulking and Cutting UK — How to eat for each phase
- Men's Gym Guide UK — Starting and sticking at it
- About Men's Fitness Starter — How this site works