If you’re planning to launch your own line of protein powder, one of the first things you need is the right manufacturing partner. There are hundreds of companies out there — but not all are equipped to handle private label protein powder production at the level you need.
To help you narrow it down, we put together this list of the best protein powder manufacturers in the USA. These companies specialize in private label manufacturing and contract manufacturing and work with businesses of all sizes — from small startups to established supplement brands. Some focus on niche, clean-label production. Others are built for large-scale runs with full turnkey services.
Whether you’re looking for whey protein, plant-based blends, or custom formulas, these manufacturers have the experience, certifications, and flexibility to help you build your brand the right way.
List of Top 10 Protein Powder Manufacturers
1. Werke Health
Werke Health is a contract manufacturer focused on health and fitness supplements, including protein powders. They offer end-to-end private label services so businesses can create their own branded products with ease. This company emphasizes quality ingredients and flexible production runs, making them ideal for niche brands or startups. Werke Health’s hands-on approach and reliability have earned it a solid reputation as a protein powder producer.
2. NutriSport Pharmacal
NutriSport Pharmacal is a supplement manufacturer that caters to sports nutrition brands. They specialize in producing protein powders and related nutritional products under private label contracts. With a GMP-certified facility, NutriSport Pharmacal maintains high quality standards for each batch. They can fill bulk orders, making them one of the go-to wholesale protein powder manufacturers for sports nutrition brands. Businesses choose NutriSport for its focus on sports supplements and dependable service.
3. Naked Nutrition
Naked Nutrition – the company behind Naked Whey Protein – stands out for its “no additives” approach. This brand’s whey protein powder contains only pure protein with no sweeteners or fillers, highlighting an extreme commitment to clean ingredients. By keeping formulas simple and transparent, Naked Nutrition has become known as one of the best protein powder manufacturers for quality-focused products. For business owners, it’s a great example of how prioritizing purity and honesty in manufacturing can earn customer trust.
4. Optimum Nutrition
Optimum Nutrition is one of the largest and best-known protein powder manufacturers in the world. Based in Illinois, they’ve been producing their popular Gold Standard Whey for decades. This long track record means Optimum has perfected large-scale production with strict quality control and testing. They set an industry benchmark for consistency – every tub of protein is reliable. Optimum Nutrition’s success shows why it’s considered a gold standard for quality in protein powder manufacturing.
5. NuCare Nutrition
NuCare Nutrition is a US-based contract manufacturer offering private label services for nutritional supplements. They can produce protein powders along with vitamins and other health products, tailoring each formula to the client’s needs. NuCare focuses on quality control and works with both small and large batch sizes to accommodate different business requirements. This flexibility, paired with their attentive customer support, makes NuCare Nutrition a reliable partner for companies developing a protein powder line.
6. Vitakem Nutraceutical Inc
Vitakem Nutraceutical has over two decades of experience as a supplement manufacturer. They operate an FDA-registered, GMP-certified facility and produce a wide range of products, from vitamins to protein powders. Vitakem offers turnkey solutions including contract manufacturing and custom private labeling, even assisting with label design and fulfillment. Their long track record and comprehensive services make them a trusted choice among protein powder manufacturing companies in the USA.
7. Makers Nutrition
Makers Nutrition is a well-known supplement manufacturer based in New York. They provide turnkey manufacturing for private label brands, handling everything from formulation to packaging for protein powders and other nutraceuticals. The company prides itself on delivering high-quality products with a strong focus on customer satisfaction. Many businesses work with Makers Nutrition as a one-stop solution to develop and produce protein supplements, benefiting from the company’s experience and reliable service.
8. Capstone Nutrition
Capstone Nutrition is a top-tier contract manufacturer located in Utah. They are regarded as one of the nation’s highest-quality supplement manufacturers, with the capability to take products from concept to marketplace. Capstone can produce protein powders at very large scales and serves many major sports nutrition brands. They handle everything in-house – product formulation, flavoring, packaging, and rigorous testing – to ensure quality output. This high capacity and all-inclusive service make Capstone one of the best protein powder manufacturing companies in the country.
9. SMP Nutra
Supplement Manufacturing Partner Inc. (SMP Nutra) is a rising star in the supplement industry. Founded in 2019 and based in New York, it has rapidly emerged as a leading private label manufacturer. SMP Nutra produces a wide array of supplements, including custom protein powder formulations, with an emphasis on quality and innovation. Despite being newer, their fast growth and modern approach make SMP Nutra a strong option for businesses seeking a progressive protein powder manufacturer.
10. NutraCap Labs
NutraCap Labs is a full-service supplement manufacturer that caters to both large and small brands. They boast a 120,000 sq. ft. facility and can handle everything from formulation to bulk production of protein powders. Uniquely, NutraCap offers low minimum order quantities (around 500 units) for custom private label runs. This flexibility and hands-on support (including help with formulation and design) make NutraCap stand out for startups comparing wholesale protein powder manufacturers. It’s a solid choice for emerging brands that need quality production without enormous volume requirements.
Conclusion
Finding the right protein powder manufacturer is one of the most important steps in building a supplement brand. The companies listed here are all US-based, offer private label or contract manufacturing, and bring different strengths to the table — whether that’s small-batch flexibility, clean-ingredient sourcing, or large-scale fulfillment capabilities.
Before choosing a supplements manufacturing partner to produce your protein powder, consider your goals: Do you need low minimums? Custom flavor development? Fast turnaround times? There’s no one-size-fits-all answer, but this list gives you a solid starting point to compare your options.
At the end of the day, the best protein powder manufacturer is the one that understands your vision — and has the tools to bring it to life.