Protein Supplements
Protein is the fundamental building block of muscle, connective tissue, enzymes, hormones, and immune factors. Adequate protein intake is essential for muscle maintenance and growth, recovery from physical activity, metabolic function, and overall body composition. While whole food sources remain the foundation of a healthy diet, protein supplements offer a convenient and efficient way to meet daily protein targets — particularly for athletes, active individuals, older adults, and those following plant-based diets.
At Best Vitamins Online, we carry protein supplements from professional-grade brands including Sunwarrior, Klean Athlete, NOW Foods, and more. From whey and casein to pea, rice, and multi-source plant blends, we offer clean, high-quality protein options across a range of dietary preferences.
Protein Types & Sources
- Whey Protein Concentrate — The most popular protein supplement; derived from dairy; contains a full amino acid profile including branched-chain amino acids (BCAAs); retains some lactose and fat
- Whey Protein Isolate — Further processed to remove most lactose and fat; higher protein content per serving; a good option for those with mild lactose sensitivity
- Casein Protein — A slow-digesting dairy protein; often used before sleep to provide a sustained release of amino acids overnight
- Pea Protein — A highly digestible plant-based protein with a strong amino acid profile; naturally free from dairy, gluten, and soy
- Brown Rice Protein — A plant-based option often combined with pea protein to create a more complete amino acid profile
- Multi-Source Plant Protein Blends — Combine pea, rice, hemp, and other plant proteins for a complete amino acid profile in a single formula
- Hemp Protein — Provides protein alongside omega-3 fatty acids and fiber; lower protein content per serving than isolates
Top Protein Brands
- Sunwarrior — Plant-based protein powders including pea, rice, and multi-source blends
- Klean Athlete — NSF Certified for Sport whey and plant-based protein formulas for athletes
- NOW Foods — Wide range of whey, pea, and plant protein options at accessible price points
- Thorne — Professional-grade whey and plant protein formulas
- Douglas Laboratories — Practitioner-trusted protein and meal replacement formulas
Related Categories
- Collagen Supplements — A specialized protein source focused on connective tissue amino acids
- Magnesium Supplements — Supports muscle function and recovery alongside protein intake
- B Vitamins — B vitamins play a key role in amino acid metabolism and energy production
- Multivitamin Supplements — Comprehensive nutrient support to complement a high-protein diet
Frequently Asked Questions
What is the difference between whey concentrate and whey isolate?
Whey concentrate is less processed and retains more of the naturally occurring fats, carbohydrates, and lactose found in whey. It typically contains 70–80% protein by weight. Whey isolate undergoes additional filtration to remove most lactose and fat, resulting in 90%+ protein by weight. Isolate is a better choice for those with lactose sensitivity or those prioritizing maximum protein per calorie.
Is plant-based protein as effective as whey?
High-quality plant protein blends — particularly pea and rice combinations — can provide a complete amino acid profile comparable to whey. Research shows that well-formulated plant protein supplements can support muscle protein synthesis effectively when consumed in adequate amounts. Individual digestibility and amino acid scoring should be considered when comparing options.
How much protein do I need per day?
General recommendations for sedentary adults start at 0.8 g of protein per kg of body weight per day. Active individuals, athletes, and older adults typically benefit from higher intakes — commonly cited ranges are 1.2–2.0 g per kg of body weight. A registered dietitian or healthcare provider can help determine the right target for your individual needs and goals.
When is the best time to take protein supplements?
Protein can be consumed at any time of day to contribute to total daily intake. Post-exercise consumption within a few hours of training is commonly recommended to support muscle recovery. Casein protein is often taken before sleep due to its slow-digesting properties. Overall daily protein intake is more important than precise timing for most people.
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