Whey Protein
by Kirkland Signature
About This Product
Kirkland Signature Whey Protein is a premium concentrate whey protein powder designed to support your fitness and muscle-building goals. Each 43g serving delivers 26g of high-quality protein, representing an impressive 60% protein concentration by weight.
Protein Type: CONCENTRATE
As a whey concentrate, this product retains more of the beneficial nutrients found naturally in whey. It offers excellent value and is absorbed within 60-90 minutes.
Advanced Product Analytics
Comprehensive analysis comparing Whey Protein against industry standards and competing products
Basic protein supplement that meets minimum requirements for muscle building.
CONCENTRATE Absorption: Moderate absorption over 60-90 minutes, suitable for general supplementation.
Complete Amino Acid Profile
BCAA Breakdown
BCAA Distribution
Individual Amounts
This product is 0.1g below the optimal leucine threshold for maximum muscle protein synthesis.
About BCAAs
Branched-Chain Amino Acids (Leucine, Isoleucine, Valine) are the three most important amino acids for muscle protein synthesis. Leucine is the primary trigger, while isoleucine and valine support energy production and recovery.
Note: Complete amino acid profile not available from manufacturer. Showing BCAA data only.
How to read: Values show percentage of optimal levels. 100% represents ideal amino acid content for muscle protein synthesis. Higher values indicate superior amino acid profile.
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Complete Nutritional Analysis
Comprehensive breakdown of macro and micronutrients per 43g serving
Protein Efficiency
With 60.5% protein by weight, this product delivers 16.3% of its calories from protein, making it less efficient for lean muscle building.
Leucine Threshold
Contains 2.4g leucine. Consider taking 1.5 servings to reach optimal 2.5g threshold.
Caloric Density
At 160 calories per 26g of protein, this equals 6.15 calories per gram of protein - moderate for cutting phases.
Complete Product Analysis
- Established brand with quality control standards
- Protein concentration (60%) below premium isolate standards
- Leucine content (2.4g) below optimal threshold for MPS
- Concentrate form may cause digestive issues for lactose-sensitive individuals
- No third-party testing certification available
- Limited amino acid profile data from manufacturer
Take 1 serving upon waking to break the overnight fast and kickstart muscle protein synthesis. Mix with water for faster absorption or milk for additional calories.
Consume within 30-60 minutes after training to optimize recovery. The 2.4 leucine content helps trigger muscle repair and growth.
Consider mixing with casein or Greek yogurt for sustained amino acid release overnight.
The Science Behind CONCENTRATE Protein
Research-Backed Benefits
Scientific studies have consistently shown that whey protein supplementation, particularly concentrate, can significantly enhance muscle protein synthesis when combined with resistance training. The high biological value and rapid absorption rate make it superior to many other protein sources.
- Muscle Growth:Studies show 20-25g of whey protein maximally stimulates muscle protein synthesis in most adults.
- Recovery:Whey protein reduces muscle damage markers and accelerates recovery between training sessions.
- Body Composition:Regular supplementation supports lean mass gains while promoting fat loss when in a caloric deficit.
Optimal Dosing Strategy
Based on current research, consuming 26g of protein per serving from this product exceeds typical requirementsfor maximizing muscle protein synthesis. The leucine content of 2.4g approaches the threshold for optimal mTOR activation.
Detailed Product Comparison
Compare Whey Protein against similar concentrate proteins to find the best option for your goals. All products are ranked by protein content and leucine levels for muscle-building potential.
| Product | Protein | Purity | Calories | Carbs | Fat | Leucine | BCAAs | Action |
|---|---|---|---|---|---|---|---|---|
Whey ProteinKirkland SignatureCurrent Product | 26g | 60.5% | 160 | 9g | 3g | 2.4g | 4.9g | Buy Now |
| Super Advanced WheyBody Fortress | 30g | 60.0% | 180 | 8g | 3g | 2.3g | 4.8g | |
| Grass-Fed Whey ProteinTransparent Labs | 28g | 85.9% | 125 | 2g | 0.5g | 3g | 6.1g | |
| Kirkland Signature WheyCostco Kirkland | 26g | 60.5% | 160 | 9g | 3g | 2.4g | 4.9g | |
| Authentic WheyJacked Factory | 25g | 80.7% | 110 | 1g | 0.5g | 2.7g | 5.5g | |
| Naked WheyNaked Nutrition | 25g | 83.3% | 120 | 3g | 2g | 2.6g | 5.3g |
How to read this table: Higher protein percentage indicates purity. Leucine content above 2.5g optimally triggers muscle protein synthesis. Lower carbs and fat are preferable for lean muscle gains. Products are sorted by protein content and leucine levels.
Frequently Asked Questions
The recommended serving is 43g providing 26g of protein. Most adults benefit from 1-2 servings daily, depending on total protein requirements. Athletes may need 2-3 servings to meet their elevated protein needs of 1.6-2.2g per kg of body weight.
Whey concentrate is best consumed post-workout or between meals for sustained protein delivery.The 2.4 content makes it particularly effective for stimulating muscle protein synthesis.
Yes, with only 160 calories and 9g of carbs per serving, this protein can support weight loss goals when used as part of a calorie-controlled diet. The high protein content (26g) helps preserve muscle mass during caloric deficit and increases satiety, reducing overall calorie intake.
Whey Protein provides 60% protein by weight, which is comparable to quality protein sources. Chicken breast contains about 31% protein, while this product offers 2.0x the protein concentration. The rapid absorption and complete amino acid profile make it superior to plant-based proteins for muscle building.
Some individuals may experience bloating or gas due to lactose content in whey concentrate.Start with half a serving to assess tolerance. Stay hydrated and don't exceed recommended daily protein intake. Consult a healthcare provider if you have kidney concerns or allergies.
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