By Rebuilt Performance Team · May 7, 2026 · 7 minutes reading time
If you have ever bought a greens powder or another all-in-one supplement, you may have noticed that many labels lack exact amounts of individual ingredients. Instead, you find formulations like “Proprietary Blend” or “Premium Mix” with a total amount – but without a breakdown of how much of each component is actually included. This practice is widespread in the supplement industry, but it raises an important question: What is really in your daily shake?
In this article, you will learn what proprietary blends are, why manufacturers use them, and what to watch out for when choosing a product to support your health and well-being. We will also show you why full transparency – like with Pure Greens™ from Rebuilt Performance – is the better way.
What are Proprietary Blends?
A “Proprietary Blend” is a combination of ingredients where the manufacturer only states the total amount of the blend but does not disclose the exact amounts of the individual ingredients. On the label, you might see, for example:
“Antioxidant Complex (3000 mg): Spirulina, Chlorella, Kale, Matcha, Acai”
So you know that a total of 3000 mg of this blend is included, but not whether 2900 mg is cheap kale and only 100 mg valuable spirulina – or vice versa. This lack of transparency makes it impossible to assess the actual effectiveness of the product.
While manufacturers argue that proprietary blends protect their “secret formulas,” there are deeper reasons for this practice – and not all of them are in the consumer’s interest.
Why do manufacturers hide their dosages?
There are several reasons why companies use proprietary blends. Some are legitimate, others less so:
Cost savings through cheap fillers
The most common reason is financial. High-quality ingredients like fermented vitamins, organic spirulina, or standardized plant extracts are expensive. If a manufacturer doesn’t have to disclose how much of each ingredient is included, they can add expensive ingredients in tiny amounts and mainly fill the blend with cheap fillers.
The label then looks impressive – 20 different “green” ingredients! – but in reality, you only get symbolic amounts of the valuable components, far below effective dosages.
Flexibility in production
Proprietary blends allow manufacturers to change their formulas between batches without having to adjust the label. If the price of an ingredient rises, they can simply reduce it and replace it with a cheaper alternative – the consumer doesn’t notice.
Concealing ineffective dosages
Many plant ingredients require certain minimum amounts to have any effect at all. Scientific studies show, for example, that spirulina in amounts under 1000 mg per serving offers hardly any measurable benefits. With a proprietary blend, a manufacturer can prominently place spirulina on the label without admitting that only 50 mg is included.
Protection against imitation
The only legitimate reason: Some companies actually want to prevent competitors from copying their carefully developed formulations. But even this reason is questionable, because truly innovative recipes can be protected by patents – so transparent information is possible here as well.
What does an ingredient list really reveal?
To understand whether a greens product is worth your money, you need to learn to read between the lines. Here are some warning signs:
The order of ingredients
Ingredients must be listed in descending order by weight. If the most valuable ingredients in a proprietary blend are listed at the very end, they are probably present only in trace amounts.
Unrealistically many ingredients
A product with 40 different ingredients in a 5-gram serving sounds impressive but is mathematically impossible if each ingredient is to be present in an effective amount. Do the math: 5000 mg divided by 40 ingredients equals an average of only 125 mg per ingredient – far too little for most plant compounds.
Missing information on extraction ratios
With plant extracts, it makes a huge difference whether it is pure powder or a concentrated extract. A "4:1 extract" means that 4 kg of raw material were processed into 1 kg of extract. Without this information, you don’t know what you’re really getting.
Pure Greens: Complete transparency instead of secrecy
At Rebuilt Performance, we have deliberately chosen not to use proprietary blends. Pure Greens™ contains no hidden mixes – every single ingredient is listed on the label with its exact dosage.
Developed at Dr. Graner Lab
Pure Greens™ was developed in the renowned Dr. Graner Lab, where nutritionists and biochemists create evidence-based formulations. Each ingredient was chosen in a dosage based on scientific findings – not marketing promises or cost calculations.
EFSA-compliant active ingredients in effective amounts
We use only ingredients whose benefits are scientifically proven:
- Spirulina in sufficient quantity to help you feel more energetic*
- Ginger in a dosage that can support digestion*
- Zinc, which contributes to normal immune system function*
All these claims are reviewed and approved by the European Food Safety Authority (EFSA).
Over 3 million satisfied customers
Rebuilt Performance has helped over 3 million customers worldwide optimize their nutrition. Pure Greens™ itself has a rating of 4.82 out of 5 stars from 553 verified reviews—a testament to the value placed on transparency and quality.
Every ingredient has a purpose
With Pure Greens™, you won’t find fillers or “pixie dust” dosages. Each ingredient is included in an amount that makes a real contribution. You can see exactly on the label what you are putting into your body—and why.
Overview note: What you should know about proprietary blends
| Feature | Proprietary blend | Transparent formulation |
|---|---|---|
| Dosage information | Only total blend amount | Each ingredient listed individually |
| Traceability | Not verifiable | Fully verifiable |
| Value for money | Often overpriced | Fair evaluation possible |
| Effectiveness |
The content of this page is for informational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always consult your doctor or qualified medical professional if you have questions about illnesses or health concerns.
Pure Greens is a dietary supplement. Dietary supplements are not a substitute for a balanced and varied diet and a healthy lifestyle. The recommended daily intake (1 scoop = 11 g) should not be exceeded. Keep out of reach of children under 3 years. Pregnant or breastfeeding women and people with known medical conditions should consult their doctor before use. Store in a cool, dry place.
The health claims used are approved by the EU/EFSA and refer to specific ingredients in the product: Vitamin A and Vitamin C contribute to normal immune system function, Zinc contributes to normal cognitive function, and inulin from chicory supports digestion. Allergens: contains wheat, barley (celiac disease), and naturally occurring sulfites from spirulina.
No proprietary blends. Full declaration.
You just read why proprietary blends are a problem. Pure Greens does it differently: 13 fully declared ingredients with clear amounts and Vitamin C, A, and Zinc, which contribute to normal immune function.
13 pure ingredients.
Fully declared. One scoop.
Every ingredient fully listed – with Vitamin C, Vitamin A, and Zinc that contribute to normal immune system function. No proprietary blends. No grass taste. No subscription.
- ✓ Vitamin C, A & Zinc contribute to normal immune function
- ✓ Zinc contributes to normal cognitive function
- ✓ 13 fully declared ingredients · no artificial flavors
declared
Ingredients
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Tastes mild – no grass flavor.
I always hated Greens powder because of the taste. This one is mild and pleasant. My wife now drinks it too.
Finally one I like to drink.
I had tried several Greens – all tasted like grass. This one is mild and fruity, I really enjoy drinking it.
Tastes really good.
All vegetables in one glass – and it tastes really good on top of that. Very satisfied.
Greens and Reds – both delicious.
I tried both, both are tasty and easy to drink. Reds in the morning, Greens in the evening.
Great product and personal service.
Tastes good and fits well into everyday life. Plus a truly personal service.
Fantastic taste, easy to stir.
Only positive experiences with the powder – great taste and it mixes effortlessly.
Very satisfied.
The taste is really good. I am generally a big fan of good supplements.
Fast delivery and great taste.
Fast delivery and really good taste. I've only been using it for a few days.
A delicious product.
Good taste, fast delivery, and good feedback. Overall a good experience.
Quickly delivered.
Quickly delivered so we could get started right away. Tastes good and is already a good habit.
Good product.
So far the product fully meets expectations. Good taste, easy to mix.
Pure Greens tastes really good.
Pure Greens tastes really good and fits perfectly into the morning.
Tasty.
Super tasty and really good flavor – both Greens and Reds.
Fast delivery.
Fast delivery. Tastes good, and it comes with good instructions.
Fast delivery, tastes good.
Super fast delivery and the product tastes really good.
Look forward to it every morning.
I've been taking Pure Greens and Pure Reds for a week and look forward to it every morning. Tastes good.
Lovely raspberry flavor.
Pure Reds has become part of my morning routine – with its lovely raspberry flavor, a fresh start.
Nice taste, good delivery.
Nice taste, fast service. I've only just started, but so far top.
Testimonials in videos or other promotional material may include people who have received compensation, free products, or other incentives.
What our customers say
Fast delivery and really good taste
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There was a small error in my order, but customer service fixed it super quickly.
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Order arrived on time, updates by email – overall a smooth experience.
No subscription obligation
Nice that I can decide when the next delivery arrives.
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