Why Do Supplements Have 20 Ingredients? Proprietary Blends & Fairy Dusting Explained (2026 Guide)
When did supplements start having twenty ingredients?
Pick up almost any botanical supplement in Australia now and the front of the pack announces a number: 9-in-1, 12-in-1, 18-in-1, 20-in-1, 25-in-1.
It is a genuine shift. A decade ago most products were one or two ingredients. The question worth asking is whether more ingredients means a better product, and the honest answer is: sometimes, and the label tells you which.
Why manufacturers do it
Three reasons, and only one of them is about you.
Convenience. The legitimate one. If you were going to take magnesium, B6, zinc and D3 separately, one capsule containing all four is cheaper and simpler than four bottles.
Search terms. A product containing twelve botanicals can be found by people searching for any of the twelve. That is a commercial advantage regardless of how much of each is in there.
Perceived value. "20-in-1" sounds like more for your money than "contains chromium." Whether it is depends entirely on the amounts.
The one thing that separates a real formula from a decorated one
There is a finite amount of material that fits in a capsule or a 2mL dropper serving. Roughly 500–800mg in a typical vegetable capsule. That total gets divided among however many ingredients are on the label.
So a 20-in-1 formula is dividing the same space twenty ways. Some of those ingredients are going to be present in amounts that do very little.
This is only a problem when the label hides which ones.
A good multi-ingredient label
Lists every ingredient with its own milligram figure. You can see 250mg of this, 100mg of that, 50mg of the other, and judge for yourself.
A weaker one
Gives a proprietary blend total: "Botanical Complex 600mg" followed by a list of eighteen plants. The split is undisclosed. It could be 550mg of the cheapest ingredient and 50mg across the remaining seventeen.
The trade term for including something in a quantity too small to matter is fairy dusting. Proprietary blends are what make it invisible.
How to spot fairy dusting in thirty seconds
- Is each ingredient itemised? If yes, you can assess it. If it is a blend total, you cannot
- Check the units column. An ingredient at 80mcg sitting among others at 100mg is a thousand times smaller — it is there for the list, not for the formula
- Compare against a standalone product. If a dedicated turmeric capsule contains 500mg and your 20-in-1 contains 50mg of it, you are getting a tenth
- Count the ingredients against the serving weight. Twenty ingredients inside a 600mg serving averages 30mg each
When a multi-ingredient formula genuinely is better
Not all of them are padding. Blends earn their place when:
The ingredients are cheap and the amounts are honest. A B-complex containing all eight B vitamins at full amounts works because B vitamins are needed in small quantities. Twelve B vitamins at proper amounts fit in one capsule comfortably.
One ingredient supports another's absorption. Black pepper extract with turmeric is the classic example — 5mg of piperine is a meaningful inclusion, not a token one.
The formula is built around one lead ingredient. A magnesium complex with 250mg of magnesium plus small supporting amounts of B6 and D3 is coherent. A formula with twenty ingredients and no clear lead is usually not.
Minerals: the elemental trap
Worth knowing for any mineral blend.
"700mg Magnesium Complex" is the weight of the whole compound — magnesium plus whatever it is bound to. The elemental magnesium is a fraction of that, varying by form.
Good labels state elemental content separately. Where they do not, the big number on the front is the compound weight, and the mineral itself is considerably less.
The same applies to zinc, iron, calcium and chromium.
More ingredients, more to check
A practical point that gets lost in the value discussion.
Every botanical brings its own considerations. In a typical multi-botanical formula you might find:
- Ashwagandha — not recommended in pregnancy
- Licorice root — affects blood pressure and potassium with prolonged use
- Sea moss or kelp — carries iodine, relevant to thyroid conditions
- Dandelion — in the daisy family, relevant to ragweed allergies
- Black walnut — a tree nut allergen
A single-ingredient product has one set of things to check. A twenty-ingredient formula has twenty. That is a real reason to prefer simpler products if you take medication or manage a condition.
The practical rule
The number on the front tells you how many ingredients. It tells you nothing about how much of each.
An itemised label with five ingredients beats a proprietary blend with twenty, every time. Turn the pack over, and if the amounts are not broken out, treat the headline number as marketing rather than information.
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Always read the label and follow the directions for use. This article is general information about supplement labelling, not health advice. Supplements should not replace a varied, balanced diet. If symptoms persist, talk to your health professional.