You can spend day after day in the gym lifting weights, but you won’t reach your true muscle potential without eating the right food.

While bicep curls and bench presses will give you the stimulus to build strength, you need proper nutrition – especially protein, carbs and fat – to fuel recovery and muscle growth.

Now, you wouldn’t go to the gym – or at least you shouldn’t – without a plan in place about how you’re going to train.

It’s the exact same with food. Eating the right nutrients while training will maximise your results, giving your muscles the fuel they need for maximum gains. 

1. Tuna. A true protein powerhouse that should be included in any balanced diet where muscle gain is the main goal. Tuna is packed with high-quality protein (about 25g per 100g serving) and is rich in omega-3 fatty acids, which help reduce inflammation and support muscle repair.

2. Salmon. Staying with fish, and salmon is another ‘must have’ food where strength training is concerned. That combination again – high-quality protein and omega-3 fatty acids – is definitely muscle growth’s best friend.

3. Eggs. A large egg contains around 6g of protein, which provides the essential amino acids needed for muscle repair and growth. Their versatility makes them easy to incorporate into various meals as well.

4. Chicken breast. Chicken breast and rice may not be the most exciting of meals, but it’s a go-to combo for many gym-goers. And that’s no surprise considering a regular chicken breast contains a similar amount of protein to tuna.

5. Lean beef. Lean beef’s high-quality protein (roughly 25g per 100g) along with all that creatine goodness make it a ‘must have’ on any muscle menu. Additional benefits come in the form of iron and zinc.

6. Turkey breast. Not just reserved for Christmas, turkey breast is an excellent year-round protein source that’s low in fat and rich in vitamin B. It supports muscle repair and growth while providing essential nutrients to keep energy levels up.

7. Cod. High-quality protein that supports muscle recovery without excess fat. Also, just like tuna and salmon, it provides a healthy dose of omega-3 fatty acids for heart health.

8. Pork tenderloin. Pork tenderloin is a very lean cut of meat, offering between 22 to 26g of protein per 100g. This, like tuna, chicken and beef, makes it an excellent source for muscle repair and growth. It’s also relatively low in fat when compared to other cuts of pork. 
   
   
9. Spinach. A muscle-building must. Superfood spinach is packed with nutrients – like iron and magnesium – that aid muscle repair and recovery. Blend with fruits in a smoothie for a mid-morning green boost.
   
   
10. Kale. Make that smoothie even greener with a healthy handful of kale. Bringing a wealth of vitamin k, vitamin c, calcium and iron to the nutrient table, kale’s a worthy addition to any muscle-building training plan.

11. Almonds. Whether you eat them raw, add to oatmeal, or throw into a smoothie; almonds are a nutrient-dense snack that carry a surprising amount of protein – around 20g per 100g.

12. Chia seeds. These tiny nutrient-dense seeds may be small, but they pack a big protein punch. Popular in smoothies or sprinkled on salads, they’re an easy way to boost your meals with extra fibre, omega-3s, and essential nutrients. 
    
    
13. Flaxseeds. Flaxseeds share a similar nutritional profile to chia seeds. They’re rich in protein (18g per 100g serving), healthy fats, and fibre – and just like their chia compatriots, they can be eaten with almost anything.

14. Oatmeal. A common breakfast dish enjoyed by families across the globe, oatmeal may not contain as much protein as many of the items on this list – typically 2.5g per 100g – but what it lacks in protein power it makes up for in complex carbs. These offer more sustained energy than simple carbs, making them ideal for fuelling workouts and recovery.

15. Milk. Milk contains both fast and slow-digesting proteins that when consumed post workout can aid in muscle recovery.  The carbs in milk also help replenish energy stores following exercise, while the calcium present supports strong bones.  
    
    
16. Chickpeas. A plant-based protein source (approximately 8.2g per 100g) that also contains complex carbs. You can add chickpeas to salads, houmous, soups, stews – pretty much anything – and their mild flavour means you’ll barely even notice them.

17. Pumpkin seeds. A high-protein snack that’s easy to carry around, easy to digest, and easy to incorporate into various meals. They’re also rich in magnesium, zinc and iron, which all support muscle function and recovery.

18. Protein powders. Post-workout shakes are as common as cool downs these days. And with around 24g of protein in a 30g scoop, it’s easy to see why.

19. Lentils. High in plant-based protein and fibre, lentils are a fantastic way to give your strength training a lift, while also boosting your digestive health.

20. Beans. Black beans, kidney beans, pinto beans; adding any of these to your muscle-building diet can help take your training to the next level. They’re all rich in plant-based protein, all packed with fibre, and all loaded with energy-boosting complex carbs.

21. Greek yoghurt. Offers a combination of fast-digesting whey protein and slow-digesting casein protein, promoting muscle repair over time. Also provides calcium, which is important for bone health.

22. Quinoa. A complete plant-based protein source that contains all nine essential amino acids, As well as supporting muscle repair and growth, quinoa also offers complex carbs for sustained energy and fibre for digestive health, making it a nutritious addition to any muscle-building diet.

23. Peanut butter. Rich in protein, healthy fats, and essential nutrients like vitamin E and magnesium, peanut butter is, in moderation, a tasty, nutritious treat that can be spread on whole-grain bread, added to smoothies, or used as a dip for fruit and veggies.

24. Asparagus. Not a high-protein food compared to tuna, chicken or chickpeas, asparagus does still contribute to your overall protein intake (2.2g per 100g), and provides a variety of essential nutrients including vitamins A, C, E and K.

25. Brussel Sprouts. Another nutrient-dense veggie that may be more green than protein, but provides fibre, vitamins C and K, antioxidants that all contribute to muscle building and overall health.

26. Brown rice. Although cooked brown rice provides only 2.5g of protein per 100g, it supplies our bodies with the carbohydrates needed for physical activity. 
    
27. Bananas. Zero protein content, however, if you’re looking for a quick burst of energy following an intense session, bananas are definitely a gym-bag must. A high potassium count helps prevent muscle cramps, too.

28. Berries. Rich in antioxidants, berries can be a welcome addition to any diet plan. In terms of working out, antioxidants help reduce inflammation and soreness following workouts. They’re also low in calories and high in fibre, making them a satisfying snack that supports overall health.

29. Cottage cheese. Loaded with casein protein, which provides a slow release of amino acids, cottage cheese can help with overnight muscle recovery. It does come in varying fat contents, so be sure to choose the one that best fits your caloric and training needs.

30. Sweet potatoes. You might not normally associate potatoes with muscle building. The sweet variety, though, are rich in complex carbohydrates that give us the energy we need to complete intense workouts. They’re also high in fibre – aiding digestion – and rich in a variety of vitamins and minerals.

31. Tofu. Whether you’re a vegetarian, vegan, or you’re just looking for a lean protein source, tofu, with its 8g of protein per 100g, is an excellent choice.  Made from soybeans, it’s an incredibly adaptable, nutrient-rich food that can support muscle-building, while adding variety to a diet.

If lifting weights signals your muscles to grow, then diet is the fuel that drives that growth.

Without proper nutrition, you won’t get anywhere near the results all your hard work in the gym deserves. 

It’s not just a case of eating more, either. It’s about eating right.

A balanced diet filled with protein, carbohydrates, and healthy fats provides your body with the fuel it needs to power through workouts and help with recovery afterwards.

If there was a nutrient league table for building muscle then protein would be number one by some distance. 

Carbs, healthy fats, vitamins and minerals all play an important role in strength training – but protein’s position as ‘muscle gain must’ champion is undisputed. 

If you’re worried your diet is a little low on high-quality protein, tinned tuna is a quick and easy way to get your levels up. It’s nutritious, delicious, and can be thrown in a gym bag, ready to eat straight after a workout.