UK Supplement Trends — September 2026: back to basics

Part of The Formulation Index, Supplement Factory’s monthly read on what UK brands are actually briefing us to make. Written by Lee Smith, Group CEO.

There is a particular kind of British September that I have come to think of as the month of the sensible shoe. The holidays are over, the evenings start closing in with indecent haste, and the whole country decides, more or less at once, that it is time to get a grip.

This year the mood had plenty to work with. The war with Iran had turned the Strait of Hormuz, which carries roughly a fifth of the world’s oil in peacetime, into the most nervously watched stretch of water on Earth. On 7 September Brent crude was hovering around $97 a barrel. A week later it had gone through $100 and carried on to almost $108. At home we had a new Prime Minister, Andy Burnham, still working out which drawer the teaspoons live in, and a Budget pencilled in for 28 October that every business owner I know was busily pretending not to think about.

So what did Britain’s supplement brands ask us to make while all this was going on? Zinc. Magnesium. A great deal of vitamin B. Nothing, in short, that you would ever see advertised on the side of a bus, and everything you would want in the cupboard if the buses stopped running.

September 2026 at a glance: the base came back

We raised 559 formulation quotes for 181 companies in September, a shade under our three-month average of 581. After August’s cooling, the classic vitamin-and-mineral base returned with the air of someone who had only popped out for milk. Zinc appeared in 56.7% of all quotes, up 6.9 points on August and 6.4 points above its own three-month average. Magnesium and Vitamin B6 tied on 55.3%. Vitamin B1 reached 52.8%, Vitamin B12 51.9% and Vitamin C 51.2%.

That is six ingredients in more than half of everything brands asked us to price, a level of national agreement you rarely see about anything, including how to make a cup of tea. The B vitamins did most of the lifting: B6 jumped 12.5 points in a single month, B1 10.8 and B12 10.7.

Behind the headliners came the minerals you would cast as the dependable supporting actors. Calcium leapt 8.3 points to 17.4%. Iodine rose 5.0 points to 12.7%, Copper 4.0 points to 19.1% and Selenium 3.7 points to 21.5%. Folate rose for the fifth month running, 16.7 points in all, to 24.0% of quotes.

Ingredient in focus: Calcium

I want to single out Calcium, because it is the least glamorous ingredient in the building and it had the best month. Nobody photographs their calcium. It has no influencer, no limited-edition flavour and, as far as I am aware, no fan club. Yet in September it was in 17.4% of quotes, 97 of them, more than twice its three-month average of 8.4%, after rising 10.4 points over two months. When calcium, iodine, copper and selenium all climb in the same month as zinc and magnesium, what you are usually looking at is brands building fuller, more complete everyday formulas rather than one-ingredient wonders.

What fell

Not everything joined the party. Taurine fell 8.5 points to 13.1%. L-Tyrosine dropped 5.8 points to 5.7%, and Black Pepper extract, the usual travelling companion of turmeric, slipped 3.2 points to 4.5%. L-Theanine, August’s record-breaker, eased 2.8 points to 23.8%, but it is still above its three-month average of 21.5%, so call it a breather rather than a fall from grace. Vitamin B3 went backwards by 5.1 points to 19.1%, and Collagen fell for a third month in a row, to 13.6% of quotes.

Formats: the great powder migration

The format story is now four months old, and it is the clearest trend in the Index. In May, powder and capsules were dead level, each in 36.3% of quotes. Since then they have gone their separate ways like a couple who met on holiday. Powder took 58.0% of September’s quotes (324 quotes), its fourth consecutive monthly rise and 21.7 points in all. Capsules fell for the fourth month running, down 19.8 points in all to 16.5%. Stick packs held at 22.9%, and liquids were a rounding error at 0.7%.

Some of this is practical. A powder gives a brand room to play with dose and flavour, it suits exactly the mineral-heavy formulas that dominated the month, and it can go into tubs, pouches or stick packs without enormous minimum orders. Some of it, I suspect, is simply that a scoop of something stirred into a glass of water feels like a ritual, and people like a ritual.

Categories: protein and energy above their averages

Beauty stayed the biggest category at 25.8% of quotes, steady against its average. Gut health took 19.9%. Protein, at 19.1%, and Energy, at 16.1%, both sat comfortably above their three-month averages, by 4.1 and 4.7 points. Sports recovery rose for a fifth straight month to 8.6%, and Pea Protein, up three months running, reached 13.2% of quotes. Collagen as a category slipped for a third month, also to 13.6%.

What it means for brands

Here is my reading, and it is only a reading: the Index measures what brands ask us to make, not why they ask. But I notice that when the world outside is expensive and alarming, briefs often come home to the things that have always worked. Cause or coincidence, September’s brands were not chasing novelty. They were building dependable, broad formulas in the format that gives them the most room to manoeuvre.

If you are planning a launch for the new year, that is worth knowing. A well-made essentials range is not a dull product. In a nervous market it is the product. And whatever the Chancellor decides on 28 October, people are still going to need their magnesium.

The numbers: September 2026

Behind the numbers: the Hive

Every figure in this edition comes out of the Hive, the platform we built to run Supplement Factory, which is also where our customers’ projects live. Each product we make has its own project there, from quote and brief through samples, approval and release, with the paperwork filed to the brand’s own Vault. The October edition has the full tour and how it is going. See what the Hive does →

Sources for the news in this edition

• Al Jazeera: Oil prices surge as US-Iran strikes intensify in Strait of Hormuz (7 September 2026)
• Al Jazeera: Why are oil futures beyond $100? (14 September 2026)
• Wikipedia: Premiership of Andy Burnham (from 20 July 2026)

The Formulation Index is built from Supplement Factory’s own formulation quotes, actives only, each counted once per quote. September 2026 figures are final, as at 31 October 2026. Explore the live Index → · August 2026 · October 2026