By Rebuilt Performance Team · May 7, 2026 · 7 min read
If you've ever bought a greens powder or any other all-in-one supplement, you might have noticed that many labels lack precise quantities of individual ingredients. Instead, you'll find formulations like "Proprietary Blend" or "Premium Blend" with a total quantity – but no 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's really in your daily shake?
In this article, you'll learn what proprietary blends are, why manufacturers use them, and what to look out for when choosing a product designed to support your health and well-being. We'll also show you why full transparency – as 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 quantities of individual ingredients. On the label, you might see, for example:
"Antioxidant Complex (3000 mg): Spirulina, Chlorella, Kale, Matcha, Acai"
So, you know there's a total of 3000 mg of this blend, but not whether 2900 mg of it is cheap kale and only 100 mg is valuable spirulina – or vice versa. This lack of transparency makes it impossible to assess the product's actual efficacy.
While manufacturers argue that proprietary blends are meant to protect their "secret formulas," there are deeper reasons for this practice – and not all of them are in the consumer's best interest.
Why do Manufacturers Hide Their Dosages?
There are several reasons why companies resort to proprietary blends. Some are legitimate, others less so:
Cost Savings through Cheap Fillers
The most common reason is financial. High-quality ingredients such as 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 tiny amounts of expensive ingredients and primarily fill the blend with cheap fillers.
The label then looks impressive – 20 different "green" ingredients! – but in reality, you're only getting symbolic amounts of the valuable components, far below effective dosages.
Flexibility in Production
Proprietary blends allow manufacturers to change their formulas between different batches without having to adjust the label. If the price of an ingredient increases, they can simply reduce it and replace it with a cheaper alternative – the consumer remains unaware.
Concealment of Ineffective Dosages
Many herbal ingredients require certain minimum amounts to have any effect at all. Scientific studies show, for example, that spirulina in amounts below 1000 mg per serving offers hardly measurable benefits. With a proprietary blend, a manufacturer can prominently feature spirulina on the label without having to admit that only 50 mg are included.
Protection from Imitation
The only legitimate reason: Some companies genuinely want to prevent competitors from copying their carefully developed formulations. However, even this reason is questionable, as truly innovative recipes can be protected by patents – transparent information is therefore also possible here.
What Does an Ingredient List Really Reveal?
To understand if a greens product is worth its money, you need to learn to read between the lines. Here are some red flags:
The Order of Ingredients
Ingredients must be listed in descending order by weight. If the most valuable ingredients in a proprietary blend are at the very end, they are likely only present 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 averages only 125 mg per ingredient – far too little for most botanicals.
Missing Information on Extraction Ratios
For plant extracts, it makes a huge difference whether it's 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: Full Transparency Instead of Secrecy
At Rebuilt Performance, we have deliberately decided against proprietary blends. Pure Greens™ contains no hidden mixtures – every single ingredient is listed on the label with its exact dosage.
Developed in the 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 at a dosage based on scientific findings – not on marketing promises or cost calculations.
EFSA-Compliant Active Ingredients in Effective Amounts
We exclusively use 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 the normal function of the immune system*
All these claims are verified 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 – proof that transparency and quality are appreciated.
Every Ingredient Has a Purpose
With Pure Greens™, you won't find any fillers or "pixie dust" dosages. Each ingredient is included in an amount that makes a real contribution. You can precisely track on the label what you're putting into your body – and why.
Overview: What You Should Know About Proprietary Blends
| Feature | Proprietary Blend | Transparent Formulation |
|---|---|---|
| Dosage Information | Only total amount of blend | Each ingredient listed individually |
| Traceability | Not verifiable | Fully verifiable |
| Value for Money | Often overpriced | Fair assessment possible |
| Efficacy |
The content on 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 with any 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) must not be exceeded. Keep out of reach of children under 3 years of age. Pregnant, breastfeeding women and individuals with known medical conditions should consult their doctor before consumption. Store in a cool, dry place.
The health claims used are approved by the EU/EFSA and refer to specific ingredients of the product: Vitamin A and Vitamin C contribute to the normal functioning of the immune system, 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 quantities and Vitamin C, A and Zinc, which contribute to normal immune function.
13 pure ingredients.
Fully declared. One Scoop.
Every ingredient openly listed – with Vitamin C, Vitamin A and Zinc, which contribute to the normal functioning of the immune system. No proprietary blends. No grassy 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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- ✓ 90 servings – the 3rd can for free
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Mild taste – no grassy flavor.
I always hated greens powder because of the taste. This one is mild and pleasant. My wife drinks it now too.
Finally one I enjoy drinking.
I tried several greens – they all tasted like lawn. This one is mild and fruity, I genuinely enjoy drinking it.
Tastes really good.
All vegetables in one glass – and it tastes really good too. 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 daily life. Plus truly personal service.
Fantastic taste, easy to mix.
Only positive experiences with the powder – great taste and it mixes effortlessly.
Very satisfied.
The taste is really good. I'm 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.
Delivered quickly.
Delivered quickly, 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 is great to incorporate into your morning routine.
Delicious.
Super delicious and really good taste – both Greens and Reds.
Fast delivery.
Fast delivery. Tastes good, and good instructions are included.
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 I look forward to it every morning. Tastes good.
Nice raspberry taste.
Pure Reds has become part of my morning routine – with its nice raspberry taste, it's a fresh start.
Fine taste, good delivery.
Fine taste, fast service. I've only been using it for a short time, but so far, it's great.
Testimonials in videos or other promotional material may include individuals who have received compensation, free products, or other incentives.
What our customers say
Fast delivery and really good taste
Fast delivery and really good taste 👌
Great taste, fast delivery
Great taste and fast service - completely satisfied so far.
Delicious and delivered quickly
Fast delivery and a delicious product.
True to taste
You need a moment to get used to the taste, but the delivery was fast and straightforward.
Customer service top-notch
There was a small error in my order, but customer service resolved it super fast.
Consistently good quality
Fast delivery and always the same good quality.
Trustworthy
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Smooth
Order arrived on time, updates by email - overall a smooth experience.
No subscription required
Nice that I can decide myself when the next delivery comes.
Great experience
Great experience from start to finish.
Excellent
An excellent product - and friendly service too.
Been a customer for a long time
Fantastic products. Have been using them for a long time and am still thrilled.
