L-Leucine: Fuel Your Muscles with Essential Amino Acid
At Bulk Nutrients, we understand the importance of fueling your body with the right nutrients to enhance your fitness journey. L-Leucine is one of the three branched-chain amino acids (BCAAs) and is classified as an essential amino acid, meaning it must be obtained through the diet. Found naturally in protein-rich foods, L-Leucine plays a role in muscle protein synthesis and is widely used in sports nutrition products.
Our L-Leucine is 100% pharmaceutical grade to deliver the highest quality and purity. With each serving, you'll experience the benefits of this essential amino acid without any unnecessary fillers or additives. We take pride in sourcing our ingredients from trusted suppliers to ensure the utmost efficacy and safety.
Product Description
Support muscle protein synthesis with L-Leucine
By incorporating L-Leucine into your routine, you're providing your muscles with an essential amino acid that plays a role in the formation of muscle proteins. Popular among heavy lifters, strength trainers and active individuals, L-Leucine is a convenient addition to a sports nutrition regimen.
Directions / Ingredients
L-Leucine Serving Size
Consume 2g (approximately 1 heaped standard teaspoon) of L-Leucine once or twice daily.
Directions
Combine powder with liquid and consume immediately.
Ingredients
100% Pharmaceutical Grade L-Leucine.
Storage
Keep package well sealed, store away from moisture, light and heat.
Further Reading
Do I Need BCAAs if I Take Protein?
The Best Sources of Plant Protein for Vegans
Will BCAAs Help Me Grow Muscle?
Getting Enough Protein as a Vegetarian
The Best Sources of Plant Protein for Vegans
BCAAs: What Are They and How Can They Help My Training?
What Are Macronutrients and Why Are They Important?
Product FAQs
How does it taste?
L-Leucine is unflavoured and is generally considered to be bitter.
What is L-Leucine made from?
This product is derived from starches.
How is Bulk Nutrients' L-Leucine packaged?
L-Leucine is packaged in resealable 250g pouches.
Where is this product made?
We blend and package all our products in our own manufacturing facility here in Australia. We source our pharmaceutical grade amino acids from China, as do 99% of all supplement companies. See here for further information.
What other products does Bulk Nutrients stock which contain L-Leucine?
Lots! Browse all the products which contain L-Leucine through our Shop by Ingredient page.
Nutrition Panels
| L-LEUCINE NUTRITION INFORMATION | ||
|---|---|---|
| Servings per 250g package: 125Servings size: 2000mg | ||
| Average Quantity Per Serving | Average Quantity Per 100g | |
| Energy (kj) | 34 | 1,700 |
| Protein (g) | 2 | 100 |
| Fats (g) | 0 | 0 |
| (saturated) (g) | 0 | 0 |
| Carbohydrates (g) | 0 | 0 |
| (sugars) (g) | 0 | 0 |
| Sodium (mg) | 0 | 0 |
| L-Leucine (mg) | 2,000 | 100,000 |
Reviews
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What Our Customers Are Saying
Customers generally rated this L-Leucine powder positively, highlighting its perceived quality, purity, value for money and prompt delivery. Many found it convenient to add to protein shakes, smoothies, juice, creatine or BCAA blends, and several described it as a useful addition to their training nutrition routine. The most common drawbacks were its bitter taste, strong smell and poor solubility, particularly in cold water; reviewers often suggested using flavoured drinks, a shaker, blender, warm water or capsules.
Excellent Product
Guy S on 22/10/2026Verified buyer
As usual a quality product from Bulk Nutrients. It seems to have assisted my recovery and endurance.
Best mixed with something flavoured
Sebastian A on 05/09/2026Verified buyer
The taste is pretty rough and very bitter, so it isn't the easiest supplement to get down on its own. Apparently that's pretty normal for unflavoured L Leucine, so I wouldn't necessarily blame this particular product. I'd definitely mix it into a flavoured shake or juice next time to make it more manageable.
product was good
Conor N on 26/08/2026Verified buyer
The results were effective, but the taste was hard to get used to. But I don't believe there's much that could be done to change that.
Great profuct
Zuzana M on 16/07/2026Verified buyer
Easy dissolve I'm water
Ewan Maxwell
Ewan M on 15/07/2026Verified buyer
Excellent product.
Effective
Stephen D on 20/06/2026Verified buyer
A bit hard to mix well, but it does the job!
Essential BCAA
Sattar S on 16/06/2026Verified buyer
I’ve been adding Bulk Nutrients L Leucine into my daily routine for a while now and the impact on my muscle building progress has been really noticeable. As someone who trains consistently and wants to get the most out of every session this stuff has genuinely supported my gains in a way I wasn’t expecting. It’s completely flavourless and disappears into water instantly which makes it so easy to take alongside everything else. The fact that it’s an essential BCAA at 100% pharmaceutical grade and backed by an Aussie owned company gives me total confidence in what I’m using. Incredible value at 250g and I won’t be going without it, highly recommend.
L-Leucine is a vital branched-chain amino acid (BCAA)
Gerd K on 04/05/2026Verified buyer
I like it because L-Leucine is a vital branched-chain amino acid (BCAA) that triggers muscle protein synthesis. I take at least \(2.5\text{g}\) of leucine per serving.
Post-workout Must
Coen ‘H’ H on 13/03/2026Verified buyer
Great addition to post-workout
Leucine
Nikki H on 30/01/2026Verified buyer
Great product Shipped quickly Great quality
L-Leucine
4.67 from 152
Product Overview
L-Leucine is one of the three branched-chain amino acids (BCAAs) and is classified as an essential amino acid, meaning it must be obtained through the diet.
Taste
Mixability
Effectiveness
Value for Money
Lactose Free
Gluten Free Ingredients
Vegetarian
Vegan
Rewards & Easy Instalments
Point Rewards
or register an account to earn 60 points when you purchase L-Leucine.
When you reach the Bronze tier, you'll earn 80 points, at the Silver tier earn 100, and 120 points on the Gold Tier. Find out more.
Pay in 4 Payments
For bigger orders over $100 AUD, choose to pay with AfterPay or PayPal Pay in 4. Find out more.
Availability & Shipping
Flat rate $9 shipping Australia-wide. Orders up to 3.5kg ship Express Post, over 3.5kg ship Parcel Post.
Multibuy Discounts
Save on L-Leucine with multibuy discounts. Add 2 or more bags to your cart and start saving.
Price Per Bag
- 250g = $20.00
- 500g (2 x 250g) bags = $18.00 each
- 1kg (4 x 250g) bags = $16.25 each