Allmax Nutrition Leucine 400g – Bulldog Nutrition Canada
Allmax Nutrition

Allmax Leucine, 400g

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Allmax Leucine 400g is pure, pharmaceutical-grade L-Leucine powder — the most critical of the three branched-chain amino acids and the key trigger of muscle protein synthesis via the mTOR signaling pathway. Unlike a full BCAA supplement that dilutes the leucine dose with isoleucine and valine, this product delivers 5g of pure leucine per scoop for athletes who want to specifically maximize the leucine threshold that activates MPS — without extra amino acids taking up scoop space. 80 servings per 400g container, unflavored, and micronized for complete water solubility.

Spec Per Serving
L-Leucine 5,000mg (5g)
Purity Pharmaceutical-grade L-Leucine
Servings per Container 80 servings (400g)
Form Micronized powder (unflavored)
Other Ingredients None
  • The primary MPS trigger in muscle — Leucine activates the mTOR/p70S6K signaling pathway in skeletal muscle, the master regulator of muscle protein synthesis; without sufficient leucine, the anabolic signal doesn't fire regardless of how much total protein you consume
  • Leucine threshold supplementation — research identifies a leucine threshold (~2.5–3.5g) needed to fully activate MPS; adding pure leucine to a meal or protein dose that's close to but below this threshold can switch on the anabolic response that a sub-threshold dose can't
  • Enhances protein quality of lower-leucine protein sources — plant proteins and collagen are low in leucine; adding 2–3g of leucine to a plant protein shake can significantly improve its anabolic potential by bringing leucine content above the threshold
  • Unflavored — mixes into anything — dissolves in water, protein shakes, or any beverage; no bitter taste or grittiness when mixed at standard doses
  • 80 servings at 5g per container — or 160 servings at 2.5g for threshold-level additions to existing meals and protein shakes

Best for: Athletes on plant-based protein who want to boost the anabolic response of each protein dose; those in caloric restriction who want to maximize MPS per gram of protein; advanced athletes who want to split BCAA intake and control leucine separately.

Not ideal for: Beginners who would be better served by a complete protein supplement; those already hitting 25–35g complete protein per meal (sufficient leucine is already present).

Ingredients: 100% L-Leucine (pharmaceutical grade). No other ingredients. Allergen Info: Vegan, gluten-free, dairy-free, soy-free. GMP-certified. Suggested Use: Mix 1 scoop (5g) with water or add to protein shake post-workout or with meals. For leucine threshold use, 2–3g (half scoop) added to a plant protein shake is common practice.

Who Is This For?

Allmax Nutrition amino acid supplement is ideal for athletes and gym-goers looking to support specific performance and recovery goals. It works well as part of a stack alongside protein, pre-workout, or as a targeted recovery supplement on training days.

Who Is This NOT For?

Not a standalone supplement for muscle building — specific amino acids work best as part of a comprehensive nutrition plan. Consult a healthcare professional before use if you have pre-existing medical conditions.

Why Buy From Bulldog Nutrition?

Bulldog Nutrition is an authorized Canadian and US retailer of Allmax Nutrition products. We source directly from the brand — never from grey market or unauthorized distributors — so every order is genuine and fresh.

  • ✓ Authorized Allmax Nutrition retailer — authentic products only, never grey market or counterfeit
  • ✓ Ships across Canada and the US — fast, reliable delivery to your door
  • ✓ 10+ years in business — a track record you can rely on
  • ✓ 4.7/5 stars from 2,400+ verified customer reviews
  • ✓ Ongoing support available — reach us anytime via email or live chat

Shipping Information

Bulldog Nutrition ships across Canada and the United States. Most orders are processed within 1 to 2 business days.

Free shipping is available on eligible orders over $100. Please note that drink cases are excluded from free shipping due to size and weight.

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Need Help?

For the fastest assistance, please use Live Chat on our website. You can also text SUPPORT to 1-833-497-3885 or use our Contact Us page for order, shipping, returns, and general support questions.

Customers rate us 4.7/5 based on 2740 reviews.

Frequently Asked Questions

What is L-Leucine used for as a supplement?
L-Leucine is the primary amino acid that activates the mTOR signaling pathway in skeletal muscle — the pathway that triggers muscle protein synthesis (MPS). Research shows a leucine threshold of approximately 2.5–3.5g is needed to maximally stimulate MPS. Supplementing pure leucine is used to: ensure each protein dose surpasses this threshold; boost the anabolic potential of low-leucine protein sources like plant proteins; and maximize MPS when total protein intake is constrained.
Is pure leucine better than a BCAA supplement?
They serve different purposes. A standard BCAA supplement (2:1:1) provides leucine alongside isoleucine and valine for endurance support, muscle sparing, and glucose metabolism. Pure leucine is used specifically for maximizing the mTOR/MPS signaling trigger — particularly valuable when adding to low-leucine protein sources (plant proteins, collagen) or to fine-tune the leucine content of individual meals. Advanced athletes sometimes use both: BCAAs intra-workout and pure leucine to optimize post-workout protein doses.
How much leucine do I need to trigger muscle protein synthesis?
Research identifies a leucine threshold of approximately 2.5–3.5g per meal or dose to maximally activate the mTOR/p70S6K pathway that triggers muscle protein synthesis. A typical serving of 25g whey protein provides approximately 2.5–3g of leucine — close to but not always over the threshold. Adding 1–2g of pure leucine to a protein dose ensures threshold activation regardless of the protein source's natural leucine content.
How many servings are in Allmax Leucine 400g?
At the 5g scoop, the 400g container provides 80 servings. At 2.5g per dose (half scoop, for leucine threshold supplementation on top of existing protein), it provides 160 uses.
Is Allmax L-Leucine available from an authorized retailer in Canada?
Yes. Bulldog Nutrition is an authorized Canadian and US retailer of Allmax Nutrition. Allmax is a Canadian brand manufactured to Health Canada NHP standards — all products sourced directly, shipped fast across Canada and the United States.

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