Why most supplements don't work and what we do differently.
BIOAVAILABILITY
The ingredient isn't enough.
It has to actually reach your cells. When you swallow a supplement capsule, your body doesn't absorb the ingredient as it appears on the label. It has to break it down, process it through the digestive system, and convert it into a form your cells can actually use. The amount that completes that journey and gets to work in your body is called its bioavailability.
This is where most supplement brands quietly cut corners because the most bioavailable forms of ingredients are typically the most expensive to source. The cheaper alternative can be listed on the label with an identical ingredient name but is absorbed at a fraction of the rate. Here's a concrete example most people find clarifying:
Magnesium Oxide vs Magnesium Glycinate
Magnesium oxide is one of the most commonly used forms of magnesium in supplements because it's inexpensive to manufacture. It contains a high percentage of elemental magnesium by weight, which looks excellent on a label.
Research shows the human body absorbs approximately 4% of magnesium oxide.Magnesium glycinate — magnesium bound to the amino acid glycine — costs significantly more to produce. Research shows the body absorbs it at rates substantially higher than oxide forms, with gentler effects on digestion.Same mineral. Same label. Completely different outcome in your body.
Every active ingredient in a Protiv formula is selected specifically in the form that clinical research demonstrates your body absorbs and uses most effectively. This applies across every category: vitamins, minerals, botanicals, and amino acids.
Some specific examples of the forms we prioritise and why:
• Vitamin D3 (cholecalciferol) rather than D2 (ergocalciferol) — research consistently shows D3 raises blood levels more effectively and maintains them for longer.
• Folate as methylfolate (5-MTHF) rather than folic acid — methylfolate is the active form the body uses directly. A significant portion of the population carries a genetic variation (MTHFR) that reduces their ability to convert folic acid to the active form — methylfolate bypasses this conversion entirely.
• Zinc as zinc bisglycinate rather than zinc oxide — bisglycinate forms of minerals are generally better tolerated and better absorbed than oxide forms.
• Marine collagen peptides rather than whole collagen protein — collagen peptides are pre-hydrolysed, meaning they've already been broken down into the smaller chains that the body absorbs and uses for skin, joint, and connective tissue support.The principle is consistent across our entire range: the ingredient on the label is the ingredient your body can actually use.
CLINICAL DOSING
The dose is where most supplement brands lose you.Including an ingredient at a sub-clinical dose is one of the most widespread and least discussed problems in the supplement industry. An ingredient can appear prominently on a product label at an amount so small that no study has ever demonstrated any effect at that level in a human being.This practice is sometimes called "fairy dusting" sprinkling in an impressive-sounding ingredient at a dose that's too low to do anything, purely so it can be listed on the pack.
How do we know what dose actually works? Clinical research. Peer-reviewed studies in which a specific ingredient was given to human subjects at a specific dose, and the results were measured and published. This body of research tells us the dose at which ingredients produce measurable effects.
At Protiv, our published doses are either at or above the doses used in the peer-reviewed clinical literature for each ingredient. This is one of the reasons our formulas are sometimes more expensive to manufacture than cheaper alternatives we don't put an ingredient in a formula at a dose that can't do what the label implies.
How to check a supplement dose yourselfWhen you're evaluating any supplement not just ours look up the ingredient on Examine.com, which aggregates peer-reviewed research on nutrition supplements. Search for your ingredient, find the section on dosage, and compare what the research uses to what's on the label.If the label lists 50mg of an ingredient that research uses at 500mg, that's a meaningful gap worth understanding.
DELIVERY SYSTEMS
How we get ingredients into your body and why it varies by product.
Not every supplement should come in a capsule. The delivery system the form in which you take the supplement affects how well your body absorbs the active ingredients and how practical the supplement is to use consistently.
At Protiv we use several delivery systems across our range, and the choice is always determined by what the science says is most effective for the specific ingredients in that product.
TABLETS
Our most common format for multi-ingredient formulas. Tablets allow us to combine multiple active ingredients in precise doses in a single product. The tablet is compressed without the synthetic binders that cheaper manufacturers use, we use only natural binding agents where binding is necessary.
CAPSULES
Used where the ingredient profile or dose requires it, or where faster dissolution is beneficial. We use capsule formats where the science supports faster uptake, for example, certain fat-soluble vitamins that benefit from rapid release.
SOLUBLE POWDERS
Some ingredients are better absorbed in liquid form, or are simply more practical for people who struggle with capsules or tablets. Soluble formats also allow for higher doses in a single serving without requiring multiple capsules.
MICRO-ENCAPSULATION
A more advanced delivery technology used for certain sensitive ingredients. Micro-encapsulation involves coating active ingredients in a protective layer that prevents degradation in the stomach and releases the ingredient at the optimal point in the digestive process. This is particularly relevant for probiotics and certain plant-derived compounds that would otherwise be partially destroyed by stomach acid before reaching the intestine where they're needed.
The delivery system for every Protiv product is chosen based on what the formulation science says is most effective for that specific ingredient combination, not on what's cheapest to produce.
MANUFACTURING STANDARDS
Where and how our supplements are made.
A formula is only as good as the conditions it's manufactured in. The cleanest, most bioavailable ingredients in the world can be compromised by poor manufacturing practices, cross-contamination, inaccurate dosing, inadequate quality controls, or poor raw material testing.
Every Protiv product is manufactured in the United Kingdom in facilities that hold the following certifications: ISO 22000 CERTIFICATION ISO 22000 is the international standard for food safety management systems. A certified facility has demonstrated robust systems for identifying, managing, and controlling food safety hazards across the entire production process — from raw material intake to finished product dispatch. It covers traceability, hygiene controls, equipment maintenance, staff training, and corrective action procedures.
GMP CERTIFICATION (GOOD MANUFACTURING PRACTICE)
GMP standards are the baseline quality framework for pharmaceutical and supplement manufacturing. A GMP-certified facility operates with documented procedures for every step of the manufacturing process, validated equipment, environmental controls, and systematic quality testing at multiple stages. GMP certification means the product in the bottle reliably matches what's on the label — in terms of ingredients, doses, purity, and stability.
BRCG CERTIFICATION
Our product packaging partners hold BRCG (Brand Reputation through Compliance Global) certification, one of the most rigorous third-party standards for food and consumer product packaging safety.
THIRD-PARTY TESTING
Most Protiv products with single or dual active ingredients are independently tested by third-party laboratories, with analysis certificates available on request. For products with complex multi-ingredient formulas, the technical complexity of definitively testing every component simultaneously makes comprehensive third-party testing scientifically impractical. However, manufacturing to ISO 22000 and GMP standards provides robust quality assurance throughout production.
If you'd like to request an analysis report for a specific product, contact us directly and we'll provide what's available.
TRANSPARENCY
We publish everything. Here's why that matters.
Label transparency in the supplement industry is rarer than it should be.The most common form of opacity is the proprietary blend, a group of ingredients listed as a combined amount without disclosing how much of each individual ingredient is present. The justification given is usually intellectual property protection. The more honest explanation is that it allows brands to list impressive ingredients on the label at amounts too small to justify the claim.
We don't use proprietary blends. Every ingredient in every Protiv product has its individual quantity published on the label. You know exactly what you're taking and at exactly what dose. You can cross-reference every ingredient against the clinical literature yourself. We actively encourage that.
This transparency extends to what we don't put in our products:
✗ No synthetic fillers — no bulking agents added to increase capsule volume without adding nutritional value.
✗ No chemical binders — no synthetic compounds used to hold tablets together. Where binding agents are needed, we use natural alternatives.
✗ No artificial colourings — no synthetic dyes added to make products look more appealing.
✗ No artificial flavourings — no synthetic flavour compounds in any format.
✗ No artificial preservatives — our products use only natural preservation methods where required.
✗ No proprietary blends — every ingredient quantity is published.This isn't a marketing checklist. It's a formulation standard that we hold ourselves to across every product in our range. If an ingredient can't justify its presence in the formula, either as an active ingredient at a meaningful dose or as a necessary processing aid with a natural alternative, it doesn't go in.
THE BOTTOM LINE
What this means for you, practically.
The science behind supplement formulation is genuinely complex. But the question you need answered when you're deciding whether to buy a supplement is simple: will this actually do something for me?
The honest answer depends on four things working together:
1. The ingredients are in a form your body can absorb.
2. They're present at doses that clinical research shows produce an effect.
3. They're manufactured in conditions that ensure what's on the label is what's in the bottle.
4. There's nothing else in the product that undermines the formula or your health.That's the standard we hold ourselves to across every product we make. Not because it makes for good marketing, because it's the only standard that makes a supplement worth taking. If you have specific questions about any ingredient in any Protiv product, contact us. We have the formulation expertise to answer them properly.