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L Leucine

L Leucine is an essential amino acid that is also one of the three BCAAs. L Leucine is the strongest of all the BCAAs and is the limiting nutrient in that L Leucine levels determine the amount of other amino acids the body can absorb. From a training perspective, L Leucine maintains muscle glycogen to provide increased energy, helps to preserve lean muscle and can increase focus during intense training.

Data based on vanilla flavour ND Contour ND Hydroxyshred GARCINIA CAMBOGIA ACETYL L CARNITINE WHEATGRASS POWDER
Protein per serve (g) 18 25.9 0 0 0
Take For
Ingredients Whey & Casein Whey & Casein 100% garcinia cambogia 100% Acetyl Carnitine 100% Wheat grass
Carbs per serve (g) 2.1 3.1 0 0 0.5
Fat total per serve (g) 0.4 1.0 0 0 0.2
Sugars per serve (g) 1.7 2.6 0 0 0.2
Serving Size (g) 25 40   1 30
Serves per kilo 40 25 83 250 33
Additional Premium Ingredients Fat burners, fibre, colostrum Thermogenic whey protein blend to help build lean muscle and burn fat Hydroxy Citric Acid (HCA) is an ingredient found in the fruit rind of Garcinia cambogia 100% pharmaceutical grade Acetyl Carnitine 100% Wheat grass
Notes Female blend to build muscle and burn fat Fat burners, vitamins & minerals, colostrum Assists with appetite suppression and weight loss Releases stored body fats into the bloodstream Contains Chlorophy to help remove toxins
Flavours Chocolate, Vanilla, Coffee, Strawberry Choc, Vanilla Natural Natural  


  • Provides increased energy
  • Important for concentration and focus
  • Supports lean muscle growth

Discover the Anabolic Trigger Properties of L-Leucine!

There are numerous amino acids in our Australian online supplements range that could prevent your body from going into catabolism; this is the stage where the body starts to break down muscle. One of the amino acids in our Australian online supplements range that may provide this benefit is L-Leucine. To find out how this amino acid works and provides anabolic benefits, please read our information below.

Understanding Exercise and Catabolism

To understand the value of amino acids in our Australian online supplements range, we need to look a little closer at exercise and the effect it has on the human body. When we exercise, the type of exercise will have an impact on your muscle protein. For example, when you do endurance exercises, your skeletal muscle protein will be affected. There will be a decrease in skeletal muscle protein synthesis and an increase in protein degradation, also known as muscle breakdown or catabolism.

Most types of exercise will have a similar effect as the example we have given before. However, there is one exception to the rule and that is resistance training. Studies have shown that resistance training can increase skeletal muscle protein synthesis, but the body will still experience muscle protein breakdown.

Still, no matter what type of exercise you are doing, there is always going to be a breakdown of muscle protein. Therefore, it is important to keep fuelling our body with nutrients, so that the breakdown of muscle protein does not take place or can be stopped for some time. Stopping exercise is not an option, because we need long term exercise to build more muscle.

When the body needs energy to keep you going during your exercise, it will revert to catabolism. Catabolism is the state where the body will break down important molecules and use them to provide you with energy. Some of the molecules that can be broken down are muscle proteins. Subsequently, this could lead to the loss of muscle if the athlete does not provide the body will the necessary nutrients to stop catabolism from happening.

Some amino acids in our Australian online supplements range have anabolic properties, which means they will ensure the body gets into an anabolic state. The anabolic state is the opposite of the catabolic state, since this state is ideal for muscle building and repair. The use of amino acids and protein powders from our Australian online supplements range can therefore not be underestimated.

The Definition of Leucine

Leucine is one of the amino acids that can put the body in an anabolic state. Studies have shown that the use of a protein powder containing leucine, or a leucine supplement alone, can provide the body with the fuel it needs so it does not need to revert to catabolism.

Amino acid leucine falls under the category of BCAA’s (Branched Chain Amino Acids). However, leucine is unique compared to the other branched chain amino acids usually found in protein powders, since leucine is the only one that can stimulate skeletal muscle protein synthesis in a major way.

The Function of Leucine Regarding Skeletal Muscle Protein Synthesis

Leucine activates a specific pathway that is needed for the anabolic state. By activating a major complex called mTOR or Mammalian Target of Rapamycin, one of the regulators of protein synthesis. mTor is usually activated when the body has sufficient ATP levels and this mTor is needed for skeletal muscle protein synthesis.

The science behind leucine can be rather complicated, so let us take a closer look at some recent studies that have proven the efficiency of this amino acid. Please note that some of these studies were executed with protein powder, carbohydrates or an individual leucine supplement. Therefore, results can be different depending on the protein powder, carbohydrate or leucine supplement used.

One recent study compared the effects of supplementing with a carbohydrate supplement, a carbohydrate with a protein powder, or a carbohydrate with protein and leucine supplement. The results indicated that test subjects taking the last combination of supplements experienced a reduction in protein breakdown and an increase in skeletal muscle protein synthesis. While test subjects taking the carbohydrate and protein supplement also experienced an increase in skeletal muscle protein synthesis, the increase was greater in test subjects taking an additional leucine supplement.

Scientists believe that the effect of leucine can be explained by a spike of plasma leucine; this can only be achieved by using a free form of a leucine supplement. When you take a normal protein powder, it will take longer for your body to digest the amino acids and get them in your circulation. Therefore, plasma levels will increase more slowly than with a leucine supplement, which is digested rapidly.


Since leucine is the most powerful amino acid where protein synthesis is concerned, it is evident that athletes could get a greater benefit from a single leucine supplement than from a protein-rich meal when trying to build muscle. However, supplements should still be combined with healthy nutrition, because our body still needs other nutrients to function properly.

When you are starting a new training program after a period of inactivity, be sure to consult a licensed health professional before you choose to supplement with leucine or start your new training routine. A health professional can make sure it is safe for you to undergo a training program and if supplementing with certain amino acid supplements could be a good idea.

While health professionals and nutritionist can give you expert advice on health-related issues, sometimes you may need some additional advice from an experienced personal trainer to get the results you wish to obtain. A personal trainer can also help you to create a training program that matches your fitness goals as well.

Looking for more supplements that could help you achieve your fitness goals? Be sure to have a look at the other fitness supplements and Nutrients Direct and take advantage of our extensive range today.



Serving size: 490mg
Servings per package: 250g – 510, 1kg - 2040, 2kg - 4081


Average Quantity Per Serving

Average Quantity Per 100g
Energy 0 kJ 0 kJ
(0 Cal) (0 Cal)
Protein (dry basis) 0.0 g 0.0 g
Fat, total 0.0 g 0.0 g
- Saturated 0.0 g 0.0 g
Carbohydrate 0.0 g 0.0 g
- Sugars 0.0 g 0.0 g
Sodium 0 mg 0 mg
Potassium 0 mg 0 mg
L-leucine 490 mg 100 g

Ingredients: 100% pharmaceutical grade L Leucine
May contain traces of milk, soybeans, cereals containing gluten, tree nuts, sesame seeds and their products.

Formulated Supplementary Sports Food.
This product is not a sole source of nutrition and should be consumed in conjunction with a nutritious diet and an appropriate physical training or exercise program.

Not suitable for children under 15 years of age or pregnant women. Should only be used under medical or dietetic supervision.

Made in Australia from local and imported ingredients.


Directions for use:

As a dietary supplement consume 5g (1 heaped teaspoon) with your preferred amount of water or fruit juice twice daily.

Serving suggestion:

L Leucine should be taken 20-30 minutes before a workout to assist with energy and focus and also directly after a workout to assist with recovery.


100% pharmaceutical grade L Leucine.

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