Understanding Proprietary Blends in Supplements
Insider guidance from a 34-year supplement veteran
Bruce Brightman
Founder, LifeSource Vitamins • Since 1992
Proprietary blends are one of the most common — and often confusing — features on supplement labels. Many consumers see them but don’t fully understand what they mean or why they matter.
Key Insight: Proprietary blends allow companies to combine ingredients without listing exact amounts. While some blends can be useful, they often make it difficult for consumers to know exactly what — and how much — they are actually getting.
After more than 34 years in the supplement industry, I’ve seen how proprietary blends can be used responsibly — and sometimes used in ways that reduce transparency. Here’s what consumers should understand.
What Is a Proprietary Blend?
A proprietary blend is a unique combination of ingredients listed under a single name on a supplement label. Instead of showing the exact amount of each ingredient, the label only shows the total weight of the entire blend.
This practice is legal, but it makes it difficult for consumers to evaluate the actual strength or effectiveness of the product.
Why Companies Use Proprietary Blends
Companies may use proprietary blends for several reasons:
What Consumers Should Look For
When evaluating supplements with proprietary blends, it’s helpful to ask:
In some cases, consumers may assume a product contains meaningful amounts of key ingredients when the actual dosages may be relatively small.
How LifeSource Vitamins Approaches Formulations
At LifeSource Vitamins, we prefer clear, transparent labeling that lists individual ingredient amounts whenever possible. We also utilize independent third-party testing as part of our long-standing commitment to consistency and accountability.
Learn more about our third-party testing standards →
Key Takeaways
Final Thoughts
After more than 34 years in this industry, I believe transparency builds trust. Understanding how proprietary blends work helps consumers make more informed decisions about their supplements.
At LifeSource Vitamins, we’ve always chosen clear labeling and honest formulations. I invite you to explore our products with confidence.
Have questions? Feel free to call us at 800.567.8122. We’re happy to help you find the right solutions for your health journey.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Always consult with your healthcare provider before starting any new supplement regimen, especially if you are pregnant, nursing, taking medication, or have a medical condition.