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L-Leucine Powder

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Price From: FROM $10.96

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L-Leucine Powder

Key Features

  • 100% Pure L-Leucine Powder
  • BulkSupplements Natural Amino Series from Fermentation Process of Plants
  • Non-GMO
  • Taste

  • Mixability

L-Leucine is a type of amino acid that is derived from reactions taking place between pancreatic enzymes and protein.


Serving Size & Timing

It is suggested that this supplement be taken in serving sizes of 2500mg two times per day. However, it is important to remember to take Valine and Isoleucine with it, or else the proportions of amino acids in the body will be off, potentially leading to adverse effects.

Nutritional Information

Supplement Facts

Serving size: 2500 milligrams
Serving per container: *
Amount Per Serving % Daily Value**
L-Leucine 2500mg *
* Daily Value not established.
** Based on 2,000 calorie diet


Sugar, soy, dairy, yeast, gluten, corn and additives.

As a dietary supplement, take 2500mg (rounded 1 tsp) twice a daily, or as directed by physician.

US Standard Measuring Spoons
Spoon Size(level) milligrams
1 teaspoon 2135
1/2 tablespoon 3202
1 tablespoon 6404



This supplement is considered food grade and has no fillers of any kind present in it.


Leucine is safe as long as suggested serving sizes are adhered to. However, anyone that has ever been diagnosed with problems affecting the liver or kidneys should not take Leucine without asking for a doctor’s opinion beforehand. Those who are nursing or pregnant should not take this supplement.


This supplement is easily dissolved in water, but it is best to combine with a protein shake and to take an hour before exercise. It should be stored in an area that is free from light, heat, and moisture in order to preserve potency and effectiveness.

Customer Reviews

Quality Product - Great Price
Been using this for over a year now, delivery is always on time, quality of the product is great. Mixes easily, taste of L- Leucine is what it is, not a issue to me. Price is great, I have saved a lot of money.*

On 10/18/2016 Steve said...

L Leucine
Just started taking this product. I take 4 other bulk supplement products. Products all review well and are inexpensive. Have been very impressed with company and products. *

On 10/6/2016 Frank said...

I always add extra Leucine to my pre and post workout shake. This help me push harder and recover faster. Leucine is the big man of the big 3 bcaa. Bulksupplements Leucine is cheaper and top quality. Will buy again.*

On 10/3/2016 Christian said...

This is a great product and value. Definite recommend! *

On 9/19/2016 Todd said...

Great Price - Great Product
I bought this to blend my own amino complex. It is perfect for what I needed. Clean, pure, and cost-efficient. Way better value than what you would buy from anywhere else. Thank you bulk supplements!*

On 9/14/2016 Justin said...

Great Price - Great Product
I bought this to blend my own amino complex. It is perfect for what I needed. Clean, pure, and cost-efficient. Way better value than what you would buy from anywhere else. Thank you bulk supplements!*

On 9/14/2016 Justin said...

When I ordered 5kg of L-Leucine I messed up and didn't put in the 10% discount code I had and didn't select free shipping. I e-mailed right away and they fixed the order, no problem. Great customer service and it arrived quicker than expected. I make a pre and post workout mix of 5 parts each L-Leucine, Glutamine, Creatine, and 1 part beta Alanine by weight. I take 2T in a whey shake before and after a workout. I also add 1T to my breakfast shake. L-Leucine is the most anabolic of the amino acids.*

On 8/27/2016 Michael said...

Pure Powder and Worth While Supplement
This powder will maximize your protein-synthesis and it is a part of any serious gym goer's regimen. Great price and mixes with glutamine and creatine very well. Very nice vacuum sealed and resealable package. I'll be reordering for sure.*

On 6/29/2016 Jared said...

Product takes a while to dissolve in water. The end result is to hopefully slow the degradation of muscle mass. Product came in a easy to open resealable bag,*

On 6/29/2016 David said...

Essential Amino Acid
Re-ordered L-Leucine; this time direct from Bulk Supplements rather than going through Amazon, and I couldn't be happier. I started taking this product after I started noticing plateaus and decreases in my lifts despite working out consistently. I chalked it up to decreased energy from fasted training, and calorie deficit. L-Leucine was recommended to help preserve muscle mass and avoid catabolism. My bench press did NOT suddenly increase by 50 pounds, but I did notice small improvements, and I've been using it on my workout days ever since. I love Bulk Supplements from their wide variety of quality products, their ridiculously fast shipping, and great customer service. I have several products I order from Bulk Supplements, and the list seems to be constantly growing. *

On 6/12/2016 Andrew said...

Great Quality!
Bulksupplements luecine is definitely high quality and very pure! It mixes very well too and has helped me maintain lean mass going through contest prep. *

On 6/11/2016 Bryn said...

Fantastic bulk of amino acid that is arguable one of the most essential. Couldn't ask for anything more, its everything i needed!*

On 5/2/2016 Tanner Wagner said...

great product, the description was 100% accurate and the delivery quick \*

On 4/20/2016 alex said...

great product, the description was 100% accurate and the delivery quick \*

On 4/20/2016 alex said...

Worked just fine for Cycling
Mixed it with water and took it for a ride. Worked just fine. I like how quickly it came in the mail, and didn't have any extra wasted packaging. Just the simple bag in a simple envelope. Perfect!*

On 4/19/2016 Eric said...

Arrived very quickly and the quality is amazing. No weird taste and texture is just great for mixing with anything! Will order again!*

On 4/6/2016 John said...

Product arrived very quickly after my order. Powder is definitely a great consistency and mixes well. No odd taste or order. Great product and will order again when I run out; amazing bargain!*

On 4/6/2016 John said...

it often proves difficult finding amino acids in free form not mixed with other nonsense and unsweetened although bulksuppliments has done just that. Research supports the effects of L-Leaucine and just that, it's nice to be able to get a product without other add ins. Shipping was quick and easy and customer service was very well rounded. The only complaint I have is the packaging and resealable bag seem to be rather difficult to operate correctly and don't stay close. Other than the resealable bags the product is solid and so is the company. *

On 4/3/2016 Tyler said...

Good quality.
I started taking this product when my doctor suggested it. Seems to be working great. Bulk Supplements products are great and they are reliable and ship quickly. Will be shopping here again. *

On 3/21/2016 Jeff said...

L-Leucine is a great product. I would definetly recommend. As usual this product was shipped and received in a fast and timely matter. I will never shop at another website.*

On 3/17/2016 Nick said...


On 2/25/2016 David said...

Great for recovery
I take 4-6g a day of leucine and my recovery time between workouts has decreased noticeably which means I can have more frequent, intense workouts. L-leucine will remain a staple of my recovery process. *

On 2/14/2016 James said...

For mature muscle
Leucine is critical for masters class competitors. I have had excellent results with leucine from Bulk Supplements.*

On 1/9/2016 Kurt said...

Only TRUE protein synthesis booster
Need to supplement with 8gr a day of this to send the message to the muscle to GROW, what I take on food or complex BCAA's not enough to make a chage*

On 12/16/2015 Lizbeth said...

Great product, great price I always order from bulk supplements*

On 12/6/2015 david said...

Great product
L Leucine is one of man components to the Branch Chain Amino Acids; its a one of the key essential aminos for building muscle

This product is the best product I have tried so far; great results in the gym

Bulk Supplements have the best quality products with the best prices as well.*

On 12/5/2015 Andrew said...

Great product. delivers eveytime.*

On 11/22/2015 Carlos said...

L-Leucine & All Products Ordered
Bulk Supplements is our Number 1 Bulk supplier!
They are our go to when we need quality products in bulk!
We love the L-Leucine and the GREAT results!
We love the Great Service! We order they ship, literally that fast!
We love the Quality!
Thank you Bulk Supplements for being on our team!

Ty Bateman
Owner getFITwithTY Professional Fitness*

On 11/10/2015 Ty said...

Great product
Ordered multiple times and never disappointed. Great for training in a fasted state. Mixes great with some flavored water. Shipping is fast and a great value.*

On 11/4/2015 Todd said...

As advertised.
Mixing 4g into ~30g of whey protein isolate is supposed to facilitate protein synthesis or whatnot. That's great and all, but it takes my unflavored whey from bland to gross. Definitely make sure you have a flavoring plan.

As usual from Bulk Supplements, it's high-quality, it mixes okay, and arrived quickly. Love the company. Not the taste.*

On 11/2/2015 Jed said...

Leucine is the most anabolic BCAA helping stimulate protein synthesis. This is a great addition to any cut to help preserve muscle mass or on a bulk to help build muscle. *

On 11/2/2015 Athanasios said...

Time to grow.
This is the first time I have purchased L-Leucine from, but not my first order from these guys. This time around I decided to make my own 10 ingredient Pre workout mixture. No doubt this is the place to do it. Valine and Isoleucine need to be consumed with this in around a 2:1:1 or ratio. Package came safely and fast. This is a pure, lone, Amino Acid, so taste by itself isn't very desirable of course. I ordered a 1kg size bag and once I received it I noticed that the Manufacturing date was 11/14 and and the expiration date is 10/16. I wish I received a fresher product but in the end this bag will be consumed way before then. I'm looking forward to purchasing more items in the future as their customer service, products, and shipping are top notch.*

On 10/11/2015 Chaz said...

Great quality and value, perfect for fasted training
I train fasted in the morning (weightlifting), and this l-leucine is the perfect thing to take beforehand to limit the catabolism that results from training in a fasted state. Five grams mixed with my pre-workout and I'm ready to go. Cheaper and more customize-able than many name-brand amino acid products; I do recommend taking it with something that has a flavor since it's somewhat bitter on its own. Overall a great product for those who want to train fasted/boost protein synthesis while staying within a budget. *

On 10/1/2015 Jenna said...

L Leucine
Good product, high quality. Order shipped and received quickly.*

On 8/30/2015 Shawn said...

Awesome Product
The product does not have the best taste, but it does the job. Mixes great with some flavored water.

Bulk got me the products in a timely fashion. *

On 8/24/2015 HotRod said...

Great customer service
I ordered Leucine to help supplement my protein intake and it does just that. Mixes easily. Bulk supplements was extremely fast in getting it to me. Ordered it on a Saturday and got it on a Wednesday. Couldn't be happier.*

On 8/11/2015 Chris said...

weight loss
this product mixed with others have been a great help to loss weight . Help with recovery of the body during and after exercises. Have found the products very pure and helpfull.*

On 7/25/2015 alex said...

Love this place
I love getting my supps in pure powder form! This is the place to get premium quality for a great price. *

On 7/25/2015 Joshua said...

Good Product
Faster recovery, fast shipping, good quality product and excellent price. It has a not so pleasant smell but mixed in my post workout shake I don't even notice it. Good product overall. *

On 7/22/2015 Arturo said...

is a great addition to any protein shake to increase protein synthesis to a greater degree or to take by its self before a training session and can be added to oats as well*

On 7/18/2015 Rich said...

Have been mixing 1 teaspoon with my protein shake. I take it before and after workouts.*

On 7/9/2015 Mark said...

Great product and fast shipping
I have only used this product a few times so far but results are already there. I'm using it mixed with post workout shake (whey, maltodextrine, leucine.) I received this product the very same week I ordered it. I love that kind of service.*

On 6/27/2015 Monte said...

L Leusine
love this product. Fast recovery over any other product I've tried.*

On 6/14/2015 john said...

Best Price!!!!
Quality powder at the best price on the net!!!!!*

On 6/9/2015 Robert said...

Just started using it and mix with my regular protein (1 tsp). I take (1 tsp)
everyday with my protein and before and after on work out days. Feel the energy since taking product.*

On 6/7/2015 David Palafox said...

Pure Leucine
I already have Bulk supps BCAA's 2-1-1 ratio. I bought extra Leucine to spike my pre and post shakes with extra muscle building protein synthesis. I wanted equal amounts of isoleucine and valine so I didn't buy the 3-1-2 ratio bcaa's that bulk supps sells. This way I have a 3-1-1 ratio or I can add even more leucine and get a 4-1-1 ratio and still maintain 1.25grams of isoleucine and valine. I hated the fillers in other companies "pure" bcaa's. Happy to find products without any filler of any kind. Will continue buying again and again.*

On 6/6/2015 Matthew said...

L leucine
Only been about a week but feel a quicker recovery time after workouts. Along with their d aspartic acid product which I love this is also a great buy.*

On 6/5/2015 Damian said...

Leucine powder
Great stuff and a tremendous price!!!!!*

On 5/24/2015 Robert said...

muscle build fat loss combo
need to be taken right but is great at the job everyone is talking about*

On 4/22/2015 tim said...

Great Product
Leucine is great for any body who trains in a fasted state especially when trying to lose body fat. I am very pleased with this product and would highly recommend it.*

On 4/7/2015 David said...

Great for fasted training
I love this product for fasted training. Just mix a little bit of sugar free lemonade mix in the water with it 20 minutes before workout. The lemonade makes it quite palatable. Great value for the price.*

On 4/7/2015 Marven said...

muscle building 101
Leucine is one of the most important amino acids to have enough of as an athlete of any kind. I started supplementing leucine (5g with every protein shake) and I've noticed that I've been getting stronger and adding mass more consistently.

The product itself is great, and I have no complaints. it came exactly as advertised.

Thanks bulk supplements!*

On 4/6/2015 Ryan said...

Like others have said this was it's difficult to find pure leucine! Thankfully bulksupplements carries it, and its of good quality. Shipping was fast too, I went with standard shipping and it was here in just a few days.
The product itself was excellent, no caking or discoloration. *

On 4/3/2015 scott said...

Great stuff
I've ordered this from other companies and it's come in the form of tiny little flakes. This stuff is a baby-fine powder and mixes up like a dream.*

On 3/31/2015 Sean said...

leucine is essential
i have been looking for a place to get pure leucine that wasnt overpriced and i found bulksupplements. They offer great prices with fast shipping. I am very pleased at the quality of the product. I supplement 5-10 grams of leucine per day since it is the most anabolic out of all the bcaas and i am very happy with the results. i will definitely order another batch soon.*

On 3/9/2015 Jacques said...

Most important BCAA (must have it)
I read a lot about L-Leucine and decided to order it from Bulk Supplements, which was one my greatest ideas. I can see the difference easily. I take about 4 grams in the morning, add it to my protein shake. I can easily say that this product does what it's supposed to do. I can see the muscle growth in the last week. I would recommend this product to anyone who wants to add lean muscle mass and burn the unwanted fat off.
Oh and the delivery was super fast, I got my package in 2 days.*

On 3/3/2015 Mehmet said...

Leucine for fasted training
After doing some research on fasted training, Leucine was recommended to limit increased muscle breakdown.. So I take 1 tablespoon 20 minutes before working out. Leucine is really all you need for your BCAAs if you eat enough protein throughout the day. It mixes well and the price is the best.*

On 1/12/2015 Tom said...

Make your own BCAAs!
After years of searching out overpriced, poorly ratio-ed BCAA blends, I turned to Bulksupplements to make my own. With Leucine being the primary driver of muscle synthesis in any protein source this helps me control just how much of it I'm getting, and makes a solid BCAA supplement much cheaper!*

On 1/8/2015 Jesse said...

Make your own BCAAs!
After years of searching out overpriced, poorly ratio-ed BCAA blends, I turned to Bulksupplements to make my own. With Leucine being the primary driver of muscle synthesis in any protein source this helps me control just how much of it I'm getting, and makes a solid BCAA supplement much cheaper!*

On 1/8/2015 Jesse said...

mass building
Great stuff! Can tell a big difference in energy at the gym.*

On 12/27/2014 boyce said...

super quality
I love leucine and used to order it from a competitor until I heard about Bulksupplements. I cannot get such good quality Product for this unbeatable price.*

On 9/27/2014 Alex Witrthoeft said...

Pure Leucine
I had a hard time finding this through my local health food store and through Whole Foods...this was the easiest and purest thing I found online.*

On 6/23/2014 Montana said...

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