Why Your Supplements From Chemist or iHerb Might Not Be What You Think | Naturopath in Melbourne

As a naturopath Melbourne, one of the most common questions I get from patients is why the vitamins they bought at the chemist or ordered from iHerb don’t seem to be working.

In August, 2026, a piece of industry news quietly dropped that should make every supplement user pause: Procter & Gamble has agreed to acquire Thorne, the dietary supplement manufacturer, from private equity firm L Catterton for $3.8 billion. If you’ve never heard of Thorne, here’s why this matters more than you’d think, and why practitioner-guided supplementation looks so different from a chemist shelf.

Why Thorne Was Such a Prized Acquisition

At just over 40 years old, Thorne became the official supplement partner of the US Olympic teams and more than 100 professional sports clubs. That’s not a marketing gimmick, it’s because Thorne holds NSF Certified for Sport status, the only independent certification recognised by the US Anti-Doping Agency and major sports leagues. Achieving that level of certification requires rigorous testing for banned substances, heavy metals, and contaminants.

Thorne built its reputation on clean formulations, large-scale clinical research, and a long-standing collaboration with the Mayo Clinic. Back in the 1980s, when most supplement companies were focused on volume, Thorne made purity its core identity: no unnecessary fillers, allergens, or binding agents. The brand was taken private by L Catterton in 2023 for $680 million, and this new deal represents a return of more than $3 billion for that investment in just two years. That tells you how valuable a clean, trusted supplement brand has become in this market.

The Pattern We’ve Seen Before

This isn’t the first time a corporate giant has acquired a respected, practitioner-grade supplement company.

P&G previously bought New Chapter, an organic vitamin brand, and it now sits alongside Align Probiotic and Metamucil in P&G’s health portfolio. A few years after the New Chapter acquisition, the brand’s founders reportedly left the company amid sharp cost-cutting and lowered standards. Since then, New Chapter has faced multiple lawsuits over labelling, dosing accuracy, and misleading advertising claims.

Nestlé has followed a similar playbook, acquiring a long list of well-known supplement manufacturers, including:

• Pure Encapsulations
• Douglas Labs
• Garden of Life
• Wobenzym
• Nature’s Bounty
• Solgar
• Osteo Bi-Flex
• Vital Nutrients

If you’re familiar with Nestlé’s track record, including ongoing lawsuits, the global scandal involving toxins in infant formula, and allegations of forced labour in its supply chain, these acquisitions raise legitimate concerns about what happens to quality once a small, mission-driven brand becomes part of a massive corporate portfolio.

Why Quality Often Declines After Acquisition

Large corporations have enormous budgets, which in theory could fund more clinical research and better product development. But the reality tends to play out differently.

A family-run or mid-sized supplement company typically works hard on quality because that reputation is their entire business. They select ingredients carefully, test rigorously, and answer directly to practitioners and patients who notice when something changes.

A large corporation’s primary objective is profit growth, and the fastest way to increase margins is cutting production costs. That usually means changing ingredient sourcing, adjusting suppliers, and loosening quality control systems, often without any visible change to the label or packaging.

I’ve watched this happen firsthand. When Nestlé acquired Pure Encapsulations, I kept a close eye on their formulations for any red flags. So far, most core products have held steady, but “extra” ingredients have started creeping into some formulations, things like modified starch, maltodextrin, palmitate, and other processing aids. These additives place additional strain on the liver, detoxification pathways, and gut, which matters significantly if you’re already managing autoimmune or gastrointestinal conditions. For a brand that was once an ambassador of clean formulations, that shift is worth noting.

Garden of Life is another example. The quality decline there hasn’t gone unnoticed by practitioners across the industry, and it’s a brand I no longer recommend to my patients.

Why Self-Prescribing From a Chemist or iHerb Isn’t Ideal

This brings us to the bigger issue: buying supplements off the shelf at a chemist or ordering from iHerb without practitioner guidance.

It’s not just about picking the “right” vitamin for a symptom. It’s about:

• Knowing which brands maintain rigorous quality control and haven’t undergone concerning ownership changes
• Understanding therapeutic dosing, which is often far higher (or specifically formulated) compared to over-the-counter versions
• Avoiding hidden fillers or additives that can undermine gut health, liver function, or detoxification pathways
• Matching the right form and combination of nutrients to your actual pathology, not just a guess based on a label

This is exactly the kind of assessment a qualified naturopath Melbourne can walk you through, rather than relying on guesswork at the shelf or a generic online bestseller list.

The Case for Practitioner-Only Brands: A Remark From Naturopath Melbourne

This is exactly why I always recommend practitioner-only brands to my patients. These brands aren’t sold on general shelves precisely because they maintain a higher standard: guaranteed potency, therapeutic dosages, and manufacturing practices that are closely monitored and rarely subject to the same corporate pressure to cut costs.

When you work with a naturopath, you’re not just getting a supplement — you’re getting a product that’s been vetted for quality, matched to your specific health picture, and backed by someone actively watching the industry for changes like the ones happening at Thorne right now.

Is Your Supplement Regimen Still Serving You?

If you’re currently self-prescribing supplements from a chemist or online retailer, it might be worth a conversation about what’s actually in your regimen and whether it’s still serving your health goals the way it should. Understanding what’s really in your supplements, and who’s behind the brand making them, is part of getting the results you’re actually looking for.

Ready to Review Your Supplement Regimen With a Naturopath Melbourne?

If you’re tired of guessing which supplements are worth taking, or wondering whether your current brand still holds up, let’s take a closer look together. Book a consult with My Natural Clinic in Highett, Melbourne, or take advantage of my free 15-minute discovery call to see if naturopathic care is right for you. Your supplement regimen should be working as hard as you are. Let’s make sure it is.

Frequently Asked Questions (Melbourne Supplement Quality)

Can I bring in what I’m already taking to be reviewed?

Yes, and I’d encourage it. Bringing your current bottles to a consult lets us check ingredient lists, sourcing, and dosing together, rather than guessing at what’s actually in your regimen.

Is Telehealth available if we aren’t in Bayside?

Yes. While many see Olga at her Melbourne clinic, she offers naturopathic support via Telehealth to families across Australia, from regional Victoria to Perth and Far North Queensland.

Are chemist-brand supplements always low quality?

Not always, but chemist shelves prioritise fast turnover and broad appeal, not therapeutic dosing or practitioner-grade purity. Some chemist brands are perfectly fine for general maintenance, but they’re rarely formulated to address a specific pathology, deficiency, or clinical picture the way a practitioner-prescribed product is.

A Regimen That Actually Works With Your Body

Supplement quality isn’t a detail, it’s the difference between a bottle that sits in your cupboard doing very little and one that’s actually formulated to support your specific health picture. The Thorne acquisition is simply the latest reminder that even trusted, practitioner-favoured brands can shift under corporate ownership, and self-prescribing off a chemist shelf or a search result rarely accounts for that.

Working with a naturopath means someone is actively tracking these industry changes on your behalf, matching therapeutic-grade products to your actual pathology, and adjusting your regimen as new evidence or new ownership structures come to light.

“I used to just grab whatever looked good at the chemist. Once I understood what was actually in some of these formulations, and how often big companies buy out the good brands, I stopped guessing and started working with someone who actually tracks this stuff.” — My Natural Clinic Patient