Filters
10 products
Strength & Performance

Join the Movement.
Get exclusive access to new drops, training plans, and 10% off your first order.
Testesterone Support
Muscle Builder
Frequently Asked Questions
What is the best protein for lean muscle?
Whey protein, whey isolate, and clear whey are popular options for supporting lean muscle due to their high protein content and low fat and sugar levels.
How can supplements support lean muscle growth?
Supplements like protein, amino acids, and creatine help support muscle repair, recovery, and growth, making it easier to build and maintain lean muscle.
What does lean muscle mean?
Lean muscle refers to building muscle while minimising fat gain, focusing on strength, definition, and overall body composition.
Can I build lean muscle while losing fat?
Yes, with the right training, nutrition, and supplementation, it’s possible to support muscle growth while managing body fat levels.
The Efectiv Promise
Service You Can Trust.
Lightning Fast Delivery
We know you need your fuel fast. Order before 4pm for same-day dispatch. Free UK delivery over £50.
30-Day Money Back
Train with confidence. If you don't feel the difference, return the unused portion for a full refund.
Gold Standard Quality
Every batch is third-party tested (ISO 17025) for banned substances and label accuracy.










