Nutrition for Gym-Goers — The UK Guide
You can't out-train a bad diet. You also don't need to obsess over macro splits, meal timing, or whatever supplement TikTok is pushing this week. Here's what actually matters — evidence-based, UK-focused, and mercifully free of nonsense.
The Fundamentals
Before supplements, before meal prep, before anything else — nail these three things:
1. Calories
- Building muscle (surplus): Eat roughly 300–500 calories above your maintenance level
- Losing fat (deficit): Eat roughly 300–500 calories below maintenance
- Maintaining: Eat at maintenance — your bodyweight stays roughly stable
How to estimate maintenance: Multiply your bodyweight in kg by 28–33 (lower if sedentary, higher if very active). A 80kg person training 3–4 times per week: approximately 2,400–2,600 calories.
2. Protein
The single most important macronutrient for anyone who trains. Aim for:
- 1.6–2.2g per kg of bodyweight per day
- For an 80kg person: 128–176g protein daily
- Spread across 3–5 meals for optimal muscle protein synthesis
Good UK protein sources:
| Food | Protein per Serving | Approximate Cost |
|---|---|---|
| Chicken breast (150g) | 46g | £1.20 |
| Tinned tuna (145g) | 25g | £0.80 |
| Greek yoghurt (200g) | 20g | £0.90 |
| Eggs (3 large) | 18g | £0.45 |
| Whey protein (30g scoop) | 24g | £0.50 |
| Cottage cheese (150g) | 16g | £0.80 |
| Lean beef mince (150g) | 31g | £1.50 |
3. Consistency
Eating well 80% of the time beats eating perfectly 50% of the time. Don't let the pursuit of optimal ruin good enough.
Supplements — What's Worth Buying
The supplement industry is worth billions. Most of it is nonsense. Here's what's actually supported by evidence:
Worth It ✅
Whey Protein
Convenient, cost-effective, and well-researched. Not magic — just an easy way to hit your protein target.
- Best value: Myprotein Impact Whey (from £15.99/kg on sale) — the UK's go-to for good reason
- Premium: Optimum Nutrition Gold Standard (£29.99/kg) — consistently excellent taste and mixability
- Budget: Bulk Powders Pure Whey (from £13.99/kg) — solid quality at the lowest price point
Myprotein Impact Whey on Amazon UK
Creatine Monohydrate
The most researched supplement in existence. Improves strength, power output, and muscle recovery. Safe, cheap, effective.
- Dose: 3–5g daily. No loading phase needed.
- Best buy: Myprotein Creatine Monohydrate (£9.99 for 250g) or any unflavoured creatine mono — the brand barely matters.
Creatine Monohydrate on Amazon UK
Vitamin D
Most people in the UK are deficient, especially October–March. Public Health England recommends supplementing during autumn and winter.
- Dose: 10µg (400 IU) daily minimum. Many fitness professionals recommend 25–50µg (1,000–2,000 IU).
- Cost: £5–£10 for a year's supply
Probably Not Worth It ❌
- BCAAs — if you're eating enough protein, BCAAs are redundant. Save your money.
- Fat burners — caffeine works (have a coffee). Everything else in "fat burner" supplements is either underdosed or useless.
- Testosterone boosters — the legal ones don't work. Full stop.
- Pre-workout — a strong coffee achieves 90% of the effect for 5% of the cost. If you do buy pre-workout, check the caffeine content and avoid proprietary blends.
Meal Prep — Practical UK Guide
Meal prep doesn't need to be Instagram-worthy. It needs to be quick, cheap, and edible on day four.
The Formula
Each meal = protein + carbs + veg
- Protein: Chicken, turkey mince, lean beef mince, salmon, eggs, tofu
- Carbs: Rice (buy 5kg bags — £4 at most supermarkets), pasta, potatoes, sweet potatoes, oats
- Veg: Frozen veg bags from Aldi or Lidl (£1 for 1kg) — broccoli, peas, spinach, mixed veg
Sample Prep Day (Sunday, ~90 minutes)
Batch cook:
- 1kg chicken breast — seasoned, oven-baked at 190°C for 25 minutes
- 750g rice — rice cooker or stovetop
- 1kg frozen broccoli — steamed
- 500g lean turkey mince — seasoned with fajita spice, pan-fried
Result: 8–10 portioned meals for the week. Total cost: approximately £12–£15.
Where to Shop
| Supermarket | Best For |
|---|---|
| Aldi / Lidl | Best overall value — frozen veg, chicken, eggs, oats |
| Tesco | Good range, Clubcard prices on protein |
| Asda | Large pack sizes, competitive meat prices |
| Myprotein | Supplements, protein snacks, bulk whey |
UK-Specific Nutrition Notes
- NHS guidelines recommend 0.75g protein per kg bodyweight for the general population. For active individuals and gym-goers, the evidence supports significantly higher intakes (1.6–2.2g/kg).
- Myprotein runs major sales on Black Friday, Easter, and throughout January. Stock up during these periods — discounts of 40–60% are common.
- Protein bars and snacks are available everywhere now. Grenade Carb Killa (available at Tesco, Sainsbury's, most newsagents) is a convenient option at around £2.50 per bar.
Hydration
Drink water. Aim for 2–3 litres daily, more on training days. Carry a bottle. It's not glamorous advice, but dehydration tanks your performance faster than almost anything else.
This content is for informational purposes only and does not constitute medical or dietary advice. Always consult your GP or a registered dietitian before making significant changes to your diet, especially if you have pre-existing health conditions.