Lean MassBuild the physique
Build the physique
you've earned.
Muscle growth isn't random. It's the product of progressive overload, adequate protein, and precise nutrient timing. Our muscle-building range is engineered to maximise every rep.
The Growth Equation.
Muscle protein synthesis is the engine of growth. Without sufficient amino acids, the right hormonal environment, and adequate recovery substrates, your training stimulus goes to waste.
We formulate for the demands of hypertrophy. Clinical doses of protein, creatine, and anabolic support compounds designed to maximise every training session.
GrowthHypertrophy
SynthesisProtein
FuelNutrition
RepairRecovery
Growth Stack
Engineered for Growth
Clinical-dose protein, creatine, and anabolic support compounds designed to maximise muscle protein synthesis.
Testesterone Support
✓
Natural Testosterone | Stress Relief
✓
190 kcal per bottle
$41.52
Muscle Builder
✓
2.4g PeptiStrong
✓
Natural Muscle Builder
$41.52
BESTSELLER
Strength & Performance
✓
5g Creatine Monohydrate
✓
3rd Party Tested
$20.75
NEW
BESTSELLER
Muscle Science
The Science of Growth
Each pillar targets a distinct anabolic pathway with clinically validated compounds at effective dosages.
fitness_center
Protein Synthesis
Muscle growth is driven by the rate of muscle protein synthesis exceeding breakdown. We deliver high-quality amino acid profiles to maximise the anabolic response to training.
- ✓ Whey Protein Isolate (30g)
- ✓ L-Leucine (3g threshold)
labs
Cell Volumisation
Muscle cells that are hydrated and saturated with creatine phosphate have a greater capacity for work and send stronger anabolic signals.
- ✓ Creatine Monohydrate (5g)
- ✓ Senactiv® (50mg)
bedtime
Recovery
Growth happens during recovery, not during training. We support the hormonal and structural repair processes that turn training stress into new tissue.
- ✓ L-Gycine (3g)
- ✓ DL185™ Dileucine
Training Split
Your training blueprint.
Different splits demand different recovery and nutrition strategies. Select your programme to see the optimal supplement timing for each training day.
Weekly Schedule
Push / Pull / Legs
MonPush
TuePull
WedLegs
ThuRest
FriPush
SatPull
SunRest
Supplement Strategy
Training Days: Pre-Workout (45min before) + Whey Isolate (post) + Creatine (5g daily)
Rest Days: Creatine (5g) + EAAs + Casein before bed
Anabolic Compounds
The Growth Stack
Every ingredient is selected for its proven ability to support muscle protein synthesis, cell volumisation, or recovery. Clinical doses, zero fillers.
verified
Ingredient Spotlight
Whey Protein Isolate
Cross-flow micro-filtered for maximum purity and bioavailability. Delivers a complete amino acid profile with over 3g of leucine per serving to maximally stimulate muscle protein synthesis.
90%
Protein Content
3.2g
Leucine / Serve
Whey Protein Isolate
Cross-flow micro-filtered for maximum purity and bioavailability. Delivers a complete amino acid profile with over 3g of leucine per serving to maximally stimulate muscle protein synthesis.
90%
Protein Content
3.2g
Leucine / Serve
Creatine Monohydrate
The most researched ergogenic aid in sports science. Saturates phosphocreatine stores to support greater training volume, cell hydration, and lean mass accrual over time.
+8%
Lean Mass
5g
Clinical Dose
DL-185™ (dileucine peptide)
A dipeptide made of two leucine molecules bonded together. Targets muscle protein synthesis (MPS) via the mTOR pathway (same pathway leucine uses, but uses peptide transporters for stronger signalling)
+60%
More anabolic than leucine
2.4g
Effective Dose
PeptiStrong®
A plant-derived (fava bean) bioactive peptide complex, discovered via AI screening. Activates muscle growth signalling pathways (mTOR, Phospho-S6).
+130%
Power Output
2g
Daily Dose
L-Leucine
The master switch for muscle protein synthesis. Directly activates the mTOR signalling pathway responsible for turning on the muscle-building machinery.
2.5g
MPS Threshold
+33%
MPS Rate
EAAs
All 9 essential amino acids in the optimal ratio for muscle growth. Unlike BCAAs, EAAs provide the complete building blocks needed for new muscle tissue construction.
9
Essential Aminos
+50%
vs BCAA alone
Growth Protocol
The Anabolic Day.
Nutrient timing is the difference between training hard and growing. Here's how to structure your supplementation for maximum muscle protein synthesis.
Morning
AM
Prime
Creatine (5g) + EAAs with breakfast to elevate muscle creatine stores and amino acid availability.
Creatine
Pre-Workout
PRE
Activate
Pre-Workout 30-45min before training to maximise blood flow, focus, and training intensity.
Pre-Workout
Post-Workout
POST
Build
Whey Isolate (40g) within 30 minutes to spike muscle protein synthesis during the anabolic window.
Whey Isolate
Before Bed
PM
Repair
L-Glycine (3g) for improved sleep quality and recovery.
SleepGrowth Intelligence Hub
Use our interactive tools to calculate your optimal protein intake, calorie surplus, and genetic muscle-building potential.
Your Details person
Research: 1.6-2.2g/kg/day maximises muscle protein synthesis. Higher intakes show no additional benefit for most individuals.
DAILY PROTEIN TARGET
160g
40PER MEAL (4 MEALS)
4.8LEUCINE / MEAL (g)
2SHAKES NEEDED
2.0g / kg BODYWEIGHT
Your Stats calculate
LEAN GAIN CALORIES
2860kcal
2560MAINTENANCE (TDEE)
+300SURPLUS
160gPROTEIN
375gCARBS
Your Frame straighten
Berkhan Formula: Max lean body mass at ~5-6% body fat = Height (cm) - 100. This provides a realistic ceiling for natural lifters.
GENETIC CEILING
78kg lean
88STAGE WEIGHT (KG)
93OFF-SEASON (KG, ~15%BF)
2.5KG MUSCLE / YEAR NOW
68%OF GENETIC POTENTIAL
PRODUCT SPOTLIGHT
Maximum growth.
Shop Build Muscle
Maximum growth.
Zero compromise.
Essential amino acids are a group of nine amino acids that the human body cannot produce on its own and must obtain through diet. They are crucial for protein synthesis, muscle repair, hormone production, and overall metabolic function.
EFECTIV® EAA is formulated with a full-spectrum 8g dose of essential amino acids (EAAs), including 3g of the most anabolic amino acid - leucine.
With 3 g of leucine per serving to trigger muscle protein synthesis, support muscle retention and enhance lower quality protein intake.
Frequently Asked Questions
Research consistently shows 1.6-2.2g of protein per kilogram of body weight per day for optimal muscle protein synthesis. Spread intake across 4-5 meals with at least 30g per serving to hit the leucine threshold.
Creatine is the most researched and proven supplement for increasing lean mass. It works by saturating muscle creatine phosphate stores, allowing you to train with greater volume and intensity — the primary drivers of hypertrophy.
Total daily protein intake matters more than timing. However, consuming 30-40g of high-quality protein within 2 hours of training and before bed (casein) provides an additional MPS advantage.
Approximately 2.5-3g of leucine per meal is required to maximally stimulate muscle protein synthesis via the mTOR pathway. Whey protein isolate naturally exceeds this threshold in a standard 30g serving.
Science-Backed Muscle Building
Building quality muscle requires more than just lifting weights and eating protein. At EFECTIV, our Build Muscle range delivers the precise nutritional substrates your body needs to maximise muscle protein synthesis, accelerate recovery, and support lean mass gain. Our products feature cross-flow micro-filtered whey isolate, clinical-dose creatine monohydrate, and advanced anabolic support compounds like HMB and EAAs — all Informed Sport certified. Whether you are a natural bodybuilder pursuing progressive hypertrophy, a strength athlete looking to add lean mass, or anyone serious about body composition, our muscle-building line provides the amino acid availability, recovery support, and cell volumisation your physiology demands.