



EFECTIV® MPS185 (with DL-185®) | 30 Servings | Muscle Builder
Tax included.
EFECTIV® DiLeucine
DL185™, or L-Leucyl-L-Leucine Monohydrate, consists of two L-leucine molecules that are enzymatically bonded together. Leucine is well-established as a key regulator of muscle protein synthesis (MPS). It activates the mTOR pathway, which is critical for initiating protein translation and muscle growth[1]. However, research suggests that leucine alone may not be sufficient to maximally stimulate MPS[2].
This is where DL185™ comes in, harnessing the highly established anabolic power of leucine, resulting in meaningful performance benefits when combined with training.
Dileucine is a natural dietary component that can be found in all animal and plant protein sources. Animal protein contains higher amounts of dileucine compared to plant protein. However, protein alone cannot provide the clinically validated amounts of dileucine, as one would have to consume 159 grams of Whey Protein Concentrate or even 219 grams of pea protein to get the L-leucyl-L-leucine found in one 2g serving of DL185™[3].
[1] Anthony, J. C., et al. (2001). J Nutr, 131(3), 856S-860S.
[2] Churchward-Venne, T. A., et al. (2012). J Physiol, 590(11), 2751-2765.
[3] Paulussen, K. J. M., et al. (2021). J Appl Physiol, 131(3), 1111-1122.
Key Benefits
Boosts Muscle Protein Synthesis – Powered by DL-185®, clinically shown to stimulate MPS for faster, more efficient muscle growth.
Enhances Strength & Performance – Supports greater training output and improved power over time.
Accelerates Recovery – Reduces muscle breakdown and promotes quicker recovery between workouts.
Supports Lean Muscle Development – Helps build quality, lean muscle mass without excess calories or bloating.
Nutritional Information
Ingredient | Per 4 Cap Serving |
DL185™ Dileucine (L-Leucyl-L-Leucine Monohydrate) | 2000 mg |
Other Ingredients: Brown Rice Flour (Gluten Free), Silicon Dioxide, Magnesium Stearate, HPMC (hydroxypropyl methylcellulose) Vegetarian Capsule Shell.
Allergen Advice: No known allergens. Manufactured in a GMP accredited manufacturing facility that handles milk, egg, soya, nuts, wheat and gluten.
This product is suitable for vegans.
How To Use
Take one serving (four capsules) daily.
For best results take one serving with your pre or post-workout meal.
Do not exceed the recommended daily intake.
Shipping & Returns
We offer FREE UK next working day delivery on every order.
Orders placed before 4pm Monday to Friday will be delivered the next working day. Any orders placed after 4pm will be delivered within 2 working days.
We have a 14-day return policy, which means you have 14 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unopened and unused. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at sales@efectivnutrition.com
Certificate of Analysis

EFECTIV® DiLeucine
DL185™, or L-Leucyl-L-Leucine Monohydrate, consists of two L-leucine molecules that are enzymatically bonded together. Leucine is well-established as a key regulator of muscle protein synthesis (MPS). It activates the mTOR pathway, which is critical for initiating protein translation and muscle growth[1]. However, research suggests that leucine alone may not be sufficient to maximally stimulate MPS[2].
This is where DL185™ comes in, harnessing the highly established anabolic power of leucine, resulting in meaningful performance benefits when combined with training.
Dileucine is a natural dietary component that can be found in all animal and plant protein sources. Animal protein contains higher amounts of dileucine compared to plant protein. However, protein alone cannot provide the clinically validated amounts of dileucine, as one would have to consume 159 grams of Whey Protein Concentrate or even 219 grams of pea protein to get the L-leucyl-L-leucine found in one 2g serving of DL185™[3].
[1] Anthony, J. C., et al. (2001). J Nutr, 131(3), 856S-860S.
[2] Churchward-Venne, T. A., et al. (2012). J Physiol, 590(11), 2751-2765.
[3] Paulussen, K. J. M., et al. (2021). J Appl Physiol, 131(3), 1111-1122.
Key Benefits
Boosts Muscle Protein Synthesis – Powered by DL-185®, clinically shown to stimulate MPS for faster, more efficient muscle growth.
Enhances Strength & Performance – Supports greater training output and improved power over time.
Accelerates Recovery – Reduces muscle breakdown and promotes quicker recovery between workouts.
Supports Lean Muscle Development – Helps build quality, lean muscle mass without excess calories or bloating.
Nutritional Information
Ingredient | Per 4 Cap Serving |
DL185™ Dileucine (L-Leucyl-L-Leucine Monohydrate) | 2000 mg |
Other Ingredients: Brown Rice Flour (Gluten Free), Silicon Dioxide, Magnesium Stearate, HPMC (hydroxypropyl methylcellulose) Vegetarian Capsule Shell.
Allergen Advice: No known allergens. Manufactured in a GMP accredited manufacturing facility that handles milk, egg, soya, nuts, wheat and gluten.
This product is suitable for vegans.
How To Use
Take one serving (four capsules) daily.
For best results take one serving with your pre or post-workout meal.
Do not exceed the recommended daily intake.
Shipping & Returns
We offer FREE UK next working day delivery on every order.
Orders placed before 4pm Monday to Friday will be delivered the next working day. Any orders placed after 4pm will be delivered within 2 working days.
We have a 14-day return policy, which means you have 14 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unopened and unused. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at sales@efectivnutrition.com
Certificate of Analysis