Free Shipping from £50. Order by 1pm - Same Day Dispatch.

Free Shipping from £50. Order by 1pm - Same Day Dispatch.

FitCookie
Login / Register
0 Wishlist
0 Compare
1 item £9.99
Menu
FitCookie
1 item £9.99
  • Clearance
  • Sale
  • Supplements
    • Amino Acids
    • Creatine
    • Fat Burners
    • Intra Workout
    • Mass Gainer
    • Protein Powder
      • Vegan Protein Powder
      • Whey Protein Isolate Powder
      • Diet Protein Powder
      • Protein Drinks
    • Pre-Workout
      • Energy Drinks
      • High Stimulant
      • Pump & Nitric Oxide
      • Other Preworkout Products
    • Post Workout
    • Testosterone Boosters
  • Food & Drink
    • Free From
      • Dairy Free
      • Gluten Free
      • Lactose Free
    • High Protein Snacks
      • Protein Cookies
      • Protein Pancakes
      • Protein Bars
    • Nut Butter Spreads
    • Oats & Porridge
    • MCT Oils
    • Coconut Oils
    • Cooking Oils
    • Sugar Free Snacks
      • Chocolate Spreads
      • Cookies & Sweets
      • Flavour Drops
      • Jams
    • Sweeteners
    • Zero Calories Sauces
    • Zero Calories Syrups
    • Other Health Products
  • Vitamins & Minerals
    • Vitamins
    • Minerals
      • Calcium
      • Chromium
      • Magnesium
      • Iron
      • Selenium
      • Zinc
    • Multivits
    • Electrolytes
  • Herbs & Remedies
    • Detox & Antioxidants
    • Digestive Health
    • Fish Oil & Omega3
    • Glucose Disposal Agents
    • Joint & Bone Health
    • Liver & Heart Health
    • Mood Support
    • Nootropics
    • Probiotics & Prebiotics
    • Skin, Hair & Nails
    • Sleep & Relaxation
  • For Him & Her
    • For Her
    • For Him
  • Collagen
  • Vegan
    • Vegan Food
      • Vegan Baking
      • Vegan Chocolate
      • Vegan Sweets
    • Vegan Supplements
      • Vegan Protein
      • Vegan Protein Bars
      • Vegan Protein Cookies
      • Vegan Protein Powder
  • Accessories
    • Shakers & Bottles
    • Training Accessories
  • FitCookieOur products
  • Brands
Home Supplements Amino Acids Leucine 4K 180 Caps – Applied Nutrition
“Per4m Creatine 150g – Per4m Nutrition” has been added to your basket. View basket
New
Leucine 4k Applied Nutrition 180 Caps
Leucine 4k Applied Nutrition 180 Caps
Leucine 4k Applied Nutrition 180 Caps
Leucine 4k Applied Nutrition 180 Caps

Leucine 4K 180 Caps – Applied Nutrition

£15.99

  • Applied Nutrition Leucine 4K offers 4000mg pure L-Leucine to support muscle growth and recovery.

  • Essential amino acid ideal for pre- and post-workout supplementation.

  • Halal certified and perfect for stacking with other amino acid supplements.

14 Items sold in last 3 hours
Add £40.01 to cart and get FREE Shipping!

In stock

Compare
Add to wishlist
SKU: 5056555205396 Categories: Supplements, Amino Acids, BCAA Tags: applied nutrition, leucine
Close
You may also like…
  • Sex Bomb For Her Applied Nutrition Sex Bomb For Her 120 Caps - Applied Nutrition £19.99 Add to basket
  • Chocolate Wow Cookie Dough Protein Fa Fitness Authority 480g Wow Cookie Dough Protein 480g - Chocolate £14.99 Add to basket
  • Micronised Creatine 150g Per4m Nutrition Per4m Creatine 150g - Per4m Nutrition £9.99 Add to basket
  • Lab One Libido Him 90 Capsules.jpg Libido HIM 90 Veg Caps - Lab One £29.99 Add to basket
  • Slim Cookie Fat Burner Fitcookie 60 Caps Slim Cookie 60Caps - FitCookie £14.99 Add to basket
  • 4759228ec45475ad175ee233d71abff4.jpg Omega 3 Ultra Strong 90 Softgels - FitCookie £24.99 Add to basket
  • Vanilla Ice Cream Wow Cookie Dough Protein Fa Fitness Authority 480g Wow Cookie Dough Protein 480g - Vanilla Ice Cream £14.99 Add to basket
  • Cordyceps Swanson Cordyceps 120 Caps - Swanson £12.99 Add to basket
  • Description
  • Additional information
  • Reviews
  • Delivery
  • NUTRITIONAL INFORMATION
Description

Applied Nutrition Leucine 4K – Pure Essential Amino Acid Support

L-Leucine is a vital essential amino acid that the body cannot produce on its own, making dietary intake or supplementation necessary. As the most abundant and important of the three Branched Chain Amino Acids (BCAAs), L-Leucine plays a crucial role in muscle protein synthesis, supporting muscle growth and recovery after intense exercise.

Applied Nutrition Leucine 4K delivers a powerful 4000mg of pure L-Leucine per serving in convenient capsule form. Derived from high-quality sources, these capsules are perfect for athletes and active individuals seeking to maximize muscle repair and reduce fatigue. Commonly found in animal-based foods such as lean meats, poultry, and fish, supplementing with Leucine ensures you get a consistent supply, especially around workouts.

These capsules are ideal to take before or after training sessions and can be easily stacked with other amino acid supplements like BCAA Amino-Hydrate and EAA Amino Fuel to enhance your performance and recovery. Plus, the product is Halal certified, providing assurance for a wide range of users.

Why Choose Applied Nutrition Leucine 4K?

  • Essential Amino Acid: Supports muscle protein synthesis and recovery.

  • High Potency: Provides 4000mg of pure L-Leucine per serving for maximum effectiveness.

  • Workout Support: Ideal for use before and after intense physical activity.

  • Stackable: Works great combined with BCAA Amino-Hydrate and EAA Amino Fuel for comprehensive amino acid support.

  • Halal Certified: Suitable for diverse dietary requirements and preferences.

Recommended use:

Consume 1-2 servings daily preferably with food.  For optimal results on training days consume one serving 45 minutes prior to exercise and one serving post exercise.

Warnings:

Please read the product label carefully. Do not exceed the recommended daily intake. This product should not be consumed by individuals allergic to any of its ingredients. A balanced diet and a healthy lifestyle are recommended.
Keep out of reach of small children. Store in a dry place at room temperature in tightly closed containers.

Additional information
Weight 0.5 g
Dimensions 12 × 12 × 12 cm
Reviews
Delivery

Standard Delivery - £3.99

(2-4 working days, Mon-Fri. Orders placed after 2:00 pm will be processed the next working day)

Express Delivery - £5.99

(1-2 working days, Mon-Fri. Orders placed after 2:00 pm will be processed the next working day)

Free UK Express Delivery

Min. spend £50 (1-2 working days, Mon-Fri. Orders placed after 2:00 pm will be processed the next working day)

Collect In Store

Collect from FtiCookie Reading, RG1 1TT

NUTRITIONAL INFORMATION

Applied Nutrition Leucine 4K

  • Serving Size: 1/2 capsules
  • Servings Per Container: 180/90
Amount Per 1 Capsule
L-Leucine 4000mg

Ingredients: L-Leucine, Bulking Agent (Rice Flour), Capsule [Hydroxypropyl Methylcellulose, Colour (Brilliant Blue)].

Related products

-9%
Abe Pre Workout 315g
Add to wishlist

ABE Pre-workout 375g – Applied Nutrition

£21.99 Original price was: £21.99.£19.99Current price is: £19.99.
Select options
Compare
Plastic Shaker Blue Clear Applied Nutrition Front 700ml
Add to wishlist

Shaker Clear Blue Top 700ml – Applied Nutrition

£7.99
Add to basket
Compare
Taurine 500 Mg 100 Capsules Swanson.jpg
Add to wishlist

Taurine 500mg 100 Caps – Swanson

£9.99
Add to basket
Compare
Aakg Muscle Pump Allnutrition 300g
Add to wishlist

AAKG Muscle Pump 300g – ALLNutrition

£19.99
Select options
Compare
Fitcookie Eaa
Add to wishlist

EAA 300g – FitCookie

£24.99
Select options
Compare
Citrulline Allnutrition 200g
Add to wishlist

Citrulline 200g – ALLNutrition

£14.99
Select options
Compare
Strawberry Berry Post Workout Formula Ostrovit 500g
Add to wishlist

Post Workout Formula 500g – OstroVit

£24.99
Select options
Compare
New
Bcaa G Force Trec Nutrition 90 Caps
Add to wishlist

BCAA G-Force 90 Caps – Trec Nutrition

£9.99
Add to basket
Compare
New
Super Bcaa System Trec Nutrition 150 Caps
Add to wishlist

Super BCAA System 150 Caps – Trec Nutrition

£14.99
Add to basket
Compare
New
Watermelon Bcaa Amino Hydrate Applied Nutrition 450g
Add to wishlist

BCAA Amino Hydrate 450g – Applied Nutrition

£19.99
Select options
Compare

    Unlock Your Wellness Potential!

    Join our newsletter to receive exclusive tips, recipes, and special discounts on our health supplements and nutritious foods!

    • Account
      • Dashboard
      • Profile
      • Order History
      • Addresses
      • Wishlist
      • Order Tracking
    • Info & Help
      • About Us
      • Careers Hiring
      • Trustpilot Reviews
      • Terms & Conditions
      • Privacy Policy
      • Shipping Policy
      • Voucher T&Cs
      • Delivery Options
      • Blog
    • Our Stores
      • FitCookie Banbury
      • FitCookie Bristol
      • FitCookie Harrogate
      • FitCookie Lemington Spa
      • FitCookie Newbury
      • FitCookie Oxford Central
      • FitCookie Oxford Templars
      • FitCookie Reading
    • Customer Service
      • Chat on WhatsApp
      • sales@fitcookie.co.uk
      • +44 7307 376199

    Visit us on:

    Facebook Instagram Tiktok Youtube
    © FitCookie™ 2025.
    • Clearance
    • Sale
    • Supplements
      • Back
      • Amino Acids
      • Creatine
      • Fat Burners
      • Intra Workout
      • Mass Gainer
      • Protein Powder
        • Back
        • Vegan Protein Powder
        • Whey Protein Isolate Powder
        • Diet Protein Powder
        • Protein Drinks
      • Pre-Workout
        • Back
        • Energy Drinks
        • High Stimulant
        • Pump & Nitric Oxide
        • Other Preworkout Products
      • Post Workout
      • Testosterone Boosters
    • Food & Drink
      • Back
      • Free From
        • Back
        • Dairy Free
        • Gluten Free
        • Lactose Free
      • High Protein Snacks
        • Back
        • Protein Cookies
        • Protein Pancakes
        • Protein Bars
      • Nut Butter Spreads
      • Oats & Porridge
      • MCT Oils
      • Coconut Oils
      • Cooking Oils
      • Sugar Free Snacks
        • Back
        • Chocolate Spreads
        • Cookies & Sweets
        • Flavour Drops
        • Jams
      • Sweeteners
      • Zero Calories Sauces
      • Zero Calories Syrups
      • Other Health Products
    • Vitamins & Minerals
      • Back
      • Vitamins
      • Minerals
        • Back
        • Calcium
        • Chromium
        • Magnesium
        • Iron
        • Selenium
        • Zinc
      • Multivits
      • Electrolytes
    • Herbs & Remedies
      • Back
      • Detox & Antioxidants
      • Digestive Health
      • Fish Oil & Omega3
      • Glucose Disposal Agents
      • Joint & Bone Health
      • Liver & Heart Health
      • Mood Support
      • Nootropics
      • Probiotics & Prebiotics
      • Skin, Hair & Nails
      • Sleep & Relaxation
    • For Him & Her
      • Back
      • For Her
      • For Him
    • Collagen
    • Vegan
      • Back
      • Vegan Food
        • Back
        • Vegan Baking
        • Vegan Chocolate
        • Vegan Sweets
      • Vegan Supplements
        • Back
        • Vegan Protein
        • Vegan Protein Bars
        • Vegan Protein Cookies
        • Vegan Protein Powder
    • Accessories
      • Back
      • Shakers & Bottles
      • Training Accessories
    • FitCookieOur products
    • Brands
    Shopping cart
    Close
    Sign in
    Close

    Lost your password?

    No account yet?

    Create an Account
    0 Wishlist
    0 Compare
    My account
    Menu