Nutricost L-Leucine is a single amino acid supplement. Each capsule has 500 mg of L-leucine, and the label serve is four capsules, which gives 2,000 mg. A bottle holds 120 capsules, so you get 30 serves. Leucine is one of the three branched-chain amino acids (BCAAs) and it is an essential amino acid, which means your body cannot make it and you get it from protein in food.
At a glance
| Detail | Nutricost L-Leucine |
|---|---|
| Brand | Nutricost |
| Type | Amino acid capsule (L-leucine) |
| Per capsule | 500 mg L-leucine |
| Serve size | 4 capsules (2,000 mg) |
| Size | 120 capsules, 30 serves |
| Label directions | 4 capsules daily with a large glass of water |
| Label notes | Third party tested, non-GMO, gluten free |
What is in it
The active ingredient is L-leucine and nothing else. There is no caffeine and no blend. Leucine is found in all complete proteins. Meat, eggs, dairy and whey protein are rich in it, and a typical scoop of whey already gives you roughly 2 to 3 g.
Do you need extra leucine? Leucine is the amino acid most linked to switching on muscle protein building after a meal. If you already eat enough protein across the day, extra leucine on top is unlikely to add much. It makes the most sense when a meal is low in protein, or when your protein comes mostly from plant sources that are lower in leucine.
Who it suits
- People who train and want to top up the leucine in lower protein meals.
- Vegetarians and vegans whose protein sources are lower in leucine. Check the capsule material on the label if you avoid gelatin.
- Anyone who wants leucine by itself in a capsule, without the taste of BCAA powder.
Who should check first
- Under 18: the label says it is for healthy adults 18 and older.
- Pregnant or breastfeeding: the label says to speak to a healthcare professional before use.
- Medical conditions or medication: check with your doctor first. This matters most for diabetes, and for kidney or liver conditions.
How to use it
The label says to take 4 capsules daily with 8 to 12 oz of water, which is about 240 to 350 mL, or as directed by your healthcare professional. Many people take it with a meal or after training. Do not take more than the label dose. Store it in a cool, dry place.
Where to buy Nutricost L-Leucine in Melbourne and Australia
Shop Nutricost L-Leucine online at Supps247 with Australia-wide delivery, or order online and use click and collect at Supps247 stores that offer online pickup. Stock varies by store, so check online or use the store locator before you travel. You can also browse more from Nutricost or our full amino acids range.
FAQs
How much leucine is in one serve?
2,000 mg from four capsules. Each capsule has 500 mg.
How long does a bottle last?
30 days at the label dose of four capsules a day.
Is leucine the same as BCAAs?
Leucine is one of the three BCAAs. The other two are isoleucine and valine. This product has leucine only.
Details checked against the bottle label on 12 November 2026. Formulas can change, so always read the label on the product you buy and follow the directions.
This article is general information, not medical advice.
