Next Day Delivery on orders made before 3pm (Mon-Fri)
FREE Next Day Delivery on orders over £100
10% off your first order with code WELCOME10
Shop. Earn. Save. With The Box loyalty

Next Day Delivery on orders made before 3pm (Mon-Fri)
FREE Next Day Delivery on orders over £100
10% off your first order with code WELCOME10
Shop. Earn. Save. With The Box loyalty
Next Day Delivery on orders made before 3pm (Mon-Fri)
FREE Next Day Delivery on orders over £100
10% off your first order with code WELCOME10
Shop. Earn. Save. With The Box loyalty
Next Day Delivery on orders made before 3pm (Mon-Fri)
FREE Next Day Delivery on orders over £100
10% off your first order with code WELCOME10
Shop. Earn. Save. With The Box loyalty

Next Day Delivery on orders made before 3pm (Mon-Fri)
FREE Next Day Delivery on orders over £100
10% off your first order with code WELCOME10
Shop. Earn. Save. With The Box loyalty
Next Day Delivery on orders made before 3pm (Mon-Fri)
FREE Next Day Delivery on orders over £100
10% off your first order with code WELCOME10
Shop. Earn. Save. With The Box loyalty
Next Day Delivery on orders made before 3pm (Mon-Fri)
FREE Next Day Delivery on orders over £100
10% off your first order with code WELCOME10
Shop. Earn. Save. With The Box loyalty

Muscle Gain

Collection: Muscle Gain

Build size, strength and lean muscle with our premium muscle gain supplements at The Box Supplements. Whether you're looking for high-quality whey protein, mass gainers, creatine or intra-workout support, we stock trusted brands to help maximise muscle growth and recovery. Ideal for beginners and advanced lifters alike, our muscle-building range is designed to support progressive overload, improved recovery and consistent results. Shop muscle gain supplements in the UK with fast delivery and outstanding customer service.

FAQ's

How long will delivery take?

We ship via DPD Next Working Day for orders placed before 3pm. Please allow 1 working day for order handling and dispatch, plus 1 working day transit.

How long do I have to return an item?

You have 30 days from the date you receive your order to return any items.

What happens if I order after the 3pm cut-off?

Orders placed after 3pm will enter our handling queue the next working day, and you’ll then need 1 working day for processing plus the usual 1 working day for DPD delivery.

How do I start a return?

Simply fill out the Customer Returns Form and we’ll send you the return instructions.

Secure global checkout

Free delivery on orders over £100

30 day return policy

Next day delivery available