Muscle Building Supplements

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110 products
XL Nutrition XTRA Whey Protein 2kg - Discount SupplementsXL Nutrition
XL Nutrition XTRA Whey Protein 2kg - Discount SupplementsXL Nutrition
£20.00 Off
12 Flavours Available
The Health Project Ultimate Whey Protein 2kg - Discount SupplementsThe Health Project
The Health Project Ultimate Whey Protein 2kg - Discount SupplementsThe Health Project
£15.00 Off
8 Flavours Available
Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg - Discount SupplementsOptimum NutritionSalted Caramel
Optimum Nutrition Gold Standard 100% Whey Protein 2.27kg - Discount Supplements Optimum NutritionBanana
£11.04 Off
13 Flavours Available
Efectiv Nutrition Whey Protein 2kg - Discount SupplementsEfectiv Nutrition
Efectiv Nutrition Whey Protein 2kg - Discount SupplementsEfectiv Nutrition
£10.00 Off
18 Flavours Available
Efectiv Nutrition Whey Protein
From £24.99 £34.99
Best Tasting Whey
XL Nutrition Creatine Monohydrate 250g
£8.00 Off
The Health Project Creatine 250g - Discount SupplementsThe Health Project
The Health Project Creatine 250g - Discount SupplementsThe Health Project
£7.00 Off
Optimum Nutrition Micronized Creatine 317g - Discount SupplementsOptimum Nutrition
Optimum Nutrition Micronized Creatine
£0.00 Off
4 Flavours Available
Efectiv Nutrition Performance Creatine 300g - Discount SupplementsEfectiv Nutrition
Efectiv Nutrition Performance Creatine 300g - Discount SupplementsEfectiv Nutrition
£6.00 Off
3 Flavours Available
XL Nutrition XTRA Mass Gainer 5.2kg - Discount SupplementsXL Nutrition
XL Nutrition XTRA Mass Gainer 5.2kg - Discount SupplementsXL Nutrition
£25.00 Off
3 Flavours Available
Optimum Nutrition Serious Mass Gainer 5.4kg - Discount SupplementsOptimum Nutrition
Optimum Nutrition Serious Mass Gainer 5.4kg - Discount SupplementsOptimum Nutrition
£7.00 Off
7 Flavours Available
XL Nutrition XTRA Protein & Carbs 5kg - Discount SupplementsXL Nutrition
XL Nutrition XTRA Protein & Carbs 5kg - Discount SupplementsXL Nutrition
£25.00 Off
3 Flavours Available

Support your fitness goals with a dynamic range of muscle building supplements. From creatine and protein powder to amino acids and mass gainers, our muscle growth supplements have been designed to accelerate strength, size, and recovery. Take alongside a healthy diet and with a proper training plan to start seeing results and reach your goals faster and more efficiently. Shop our best muscle building supplements now.

Supplements for muscle growth

Muscle building supplements offer a powerful way to support muscle growth, repair, and performance. To effectively build muscle you need to be in a positive protein balance, which is where muscle gain supplements come in. Your muscles are continuously going through a cycle of muscle protein breakdown and muscle protein synthesis or growth. When muscle protein synthesis exceeds muscle protein breakdown, muscle mass increases. Taking supplements for muscle growth makes this process easier and also allows your muscles to repair quickly between workouts. 

The best supplements for muscle gain

We’ve created our range of muscle growth supplements to target all the systems in the body necessary for gaining muscle, including:

  • Protein  - Our power-packed whey protein powders and plant based protein powders support muscle growth and repair after training

  • Creatine - Boost strength and power during high-intensity training with creatine tablets and powders including our superblend CreaMag supplement

  • BCAAs - BCAAs, or branched-chain amino acids, aid in reducing muscle fatigue and promoting recovery to push you through your workout

  • Casein - Delivering a sustained release of protein throughout the day, casein protein builds muscle even while you sleep

  • Mass gainers - Replenish the calories lost during training with mass gainers to ensure you’re in a calorie surplus for maximum muscle gain 


Discover the best supplements for muscle gain from industry-leading brands, including CNP, The Health Project and Efectiv Nutrition at Discount Supplements now. 

 

Frequently Asked Questions

How do I safely grow muscle?

To safely grow muscle you need a combination of the right training, nutrition, and recovery habits. Muscle growth supplements can also help support your fitness journey. To build muscle, your body needs to go through a process of hypertrophy; this happens when you challenge your muscles through resistance or weight training, and give them the fuel they need to grow back stronger. Muscle protein synthesis (MPS) is your body’s way of repairing and building new muscle fibres after a workout.

To support this process, eat protein-rich foods, get plenty of rest, and consider adding muscle building supplements like whey protein, creatine, and BCAAs to your routine. These can help speed up recovery, boost performance, and give your body the nutrients it needs for consistent progress. Stick to a smart training plan, eat well, and stay consistent—safe muscle growth takes time, but it will be worth it.

Do muscle gain supplements work?

Muscle gain supplements absolutely work, especially when you’re training hard and eating right. The key is using the best muscle building supplements for your needs. Whey protein is a fast-absorbing source of protein that helps kickstart muscle recovery and growth after workouts, creatine is one of the most effective supplements for boosting strength, power, and muscle mass, and BCAAs are great at reducing muscle soreness and supporting recovery between workouts. Mass gainers are also ideal if you struggle to get enough calories in your diet to support muscle growth. Combined with a consistent workout plan and a balanced diet, they can really help maximise your results. Let the gains begin.

Should you just eat protein to build muscle?

Protein is incredibly important for building muscle, but it’s not the only thing your body needs. Protein is the foundation for muscle growth, especially after workouts when your body is repairing and growing. But to really reach your goals, you need the full package: protein, carbs, fats, strength training, and recovery.

Carbs give you energy to crush your workouts, healthy fats support hormone balance (which plays a role in muscle growth), and of course, strength training is what actually triggers your muscles to grow in the first place. Supplements like whey protein, creatine, and BCAAs can help you stay on top of your game, and will work best as part of a well-rounded plan.

Eating protein bars and drinking protein shakes all helps, but to grow muscle and see long-lasing results, think balance, consistency, and fueling your body the smart way. 

When is the best time to take muscle building supplements?

The best time really depends on which supplement you're taking and what your training routine looks like.

  • Whey protein - Best taken right after your workout to kickstart recovery and muscle growth when your body needs it most
  • Creatine - You can take it before or after your workout as long as you take it consistently each day. Some people like it post-workout with their protein shake
  • BCAAs - Great before or during your workout to help reduce muscle breakdown and support endurance
  • Mass gainers - These are flexible and perfect as a meal replacement or post-workout shake to help hit your calorie goals

Are muscle growth supplements safe?

Muscle growth supplements are safe as long as you’re using them the right way and choosing quality products. Supplements like whey protein, creatine, BCAAs, and pre-workouts have been widely researched with the vast majority of healthy adults reporting no problems.

Stick to the recommended dosages, and always check the label. If you have any allergies, medical conditions, or are taking other medications it’s a good idea to talk to your doctor or a healthcare professional before starting something new.

Taking supplements to build muscle should be done in line with adequate nutrition and training. So focus on eating well, training smart, staying hydrated, and getting enough sleep. When you’ve got all that dialed in, muscle growth supplements can safely give you that extra edge.

How long before I see results from muscle building supplements?

For example, creatine can give you a boost in strength and performance within the first couple of weeks. Whey protein supports muscle recovery and growth, but you’ll see the best results when it’s part of a solid routine over time. Mass gainers and BCAAs also help support progress, but they’re not overnight fixes. All muscle gain supplements help amplify your hard work, but will work best when paired with good food, smart training, and quality rest.