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A growing share of supplements are bought from retailers in another country. The prices can be lower, the range is wider, and a product that is not stocked locally may be a few clicks away. The trade-off is that the bottle arriving at your door was labelled, formulated and priced for a different market, under different rules, and the things you would check in a local shop need checking differently.
This article covers what actually changes when a supplement crosses a border: labelling, formulation, price comparison, import rules in general terms, and the physical journey of the product. It is not a recommendation to buy from any retailer, and it makes no claim about any product. It assumes you can already read a Supplement Facts panel; if not, How to Read a Supplement Label comes first.
The label follows the seller’s country, not yours
A product sold by a retailer based in the United States carries a U.S.-format label: a “Supplement Facts” panel, amounts in the units U.S. law requires, and percentages against the U.S. Daily Value. The identical brand sold in the European Union carries a “food supplement” label with amounts in micrograms and percentages against the EU Nutrient Reference Value. Sold in Australia, it carries an AUST L number issued by the Therapeutic Goods Administration and follows Australian labelling rules.
The percentages differ even when the amount does not. Vitamin D at 10 µg is 50% DV on a U.S. label and 200% NRV on an EU label. Vitamin D on the label works through that example in detail. The rule that carries across every category: read the amount per serve in grams, milligrams or micrograms, never the percentage, and convert units yourself where two labels use different ones.
The formulation can differ too
It is common for a brand to sell products under the same name in different markets with different formulations, because ingredients permitted in one country are restricted or require a different status in another. The differences you are most likely to meet:
- Maximum strengths. Some countries cap the amount of a vitamin or mineral that may be sold as a supplement rather than a medicine. A brand’s 5,000 IU vitamin D or 100 mg zinc product may exist only in markets where that strength is permitted over the counter.
- Permitted ingredients. Certain botanicals, amino acids and novel ingredients are on sale as supplements in one jurisdiction and not in another. The international version may contain something the local version omits, or vice versa.
- Sweeteners, colours and preservatives. Additive rules differ. A flavoured powder’s ingredient list can be noticeably different between the U.S. and EU versions.
- Serving size and pack size. The same brand may sell a 60-count locally and a 120- or 240-count internationally, at a per-unit price that is not obvious until you calculate it.
None of this means the international version is better or worse. It means the label on the product you receive is the one to read, and a review or comparison written about the local version may not describe it.
Comparing prices across retailers and currencies
International retailers display prices in your currency, usually converted at their own rate, sometimes with a currency-conversion margin built in. Add shipping, any handling fee, and — above a threshold that varies by country — import duty and sales tax collected either by the retailer at checkout or by the carrier on delivery. The advertised unit price is the start of the calculation, not the end.
The comparison that works is the same one used across this site: cost per unit of the active ingredient, delivered.
- Total the order: product price, shipping, and any tax or duty shown at checkout.
- Divide by the number of servings in the pack (from the label, not the marketing).
- Divide again by the amount per serving of the ingredient you are actually buying — grams of protein, micrograms of vitamin D, grams of creatine.
- Do the same for the local product, and compare the two numbers.
Bulk sizes and multi-buy discounts change the answer, as does a shipping cost that is spread over one bottle versus five. A larger international retailer such as iHerb typically lists the label panel, the pack count and the shipping estimate on the product page, which is what makes this arithmetic possible before you buy; smaller sellers and marketplace listings often do not, and a listing that hides the panel is a reason to look elsewhere.
Personal-import rules, in general terms only
Most countries allow individuals to import a limited quantity of supplements for personal use without a licence, and most set conditions: a maximum quantity (often expressed as a supply period), a prohibition on resale, and a list of ingredients that cannot be imported at all or require a prescription. Some countries require that the product not contain a substance scheduled as a medicine locally, regardless of how it is classified where it was sold.
The specific limits, thresholds and prohibited-ingredient lists change and are set by your own country’s customs and medicines authorities. This article does not reproduce them because a summary would be out of date the moment a schedule changed. The authorities to check are your national medicines regulator (the TGA in Australia, the MHRA in the UK, the FDA in the U.S., Health Canada, the EMA and national agencies in the EU) and your customs service. A large retailer’s help pages will also usually state which products it will not ship to your country, which is a fast first filter.
A product held at the border is usually either returned or destroyed, and the retailer’s refund policy for that event is worth reading before ordering anything unusual.
The journey: heat, time and packaging
A bottle that spends two to four weeks in transit, part of it in an aircraft hold and part of it in a delivery van, is exposed to conditions a shop shelf is not.
- Heat. Softgels can soften and stick; probiotics and some oils are labelled for refrigeration and may be shipped with a cold pack or not at all. Read the storage instruction on the product page before ordering in summer.
- Expiry. International retailers generally state a minimum remaining shelf life on arrival; check it, because a bulk pack with eight months left may not be finished in time. The best-before date on the bottle is the one to trust.
- Seals. Every supplement should arrive with an intact outer seal and, usually, an inner foil or induction seal. A broken seal is a reason to contact the retailer, not to use the product.
- Packaging. Glass bottles and large tubs travel less well than plastic bottles and pouches. Retailers usually pack well; the point is to inspect on arrival rather than weeks later.
Reading the retailer’s page like a label
A well-run international retailer’s product page does most of the work of the physical label, and a few things beyond it.
- The Supplement Facts image. Should be legible and should match the product name and count. If the image shows a different pack size or an older formulation, the page is stale.
- Ingredient list and allergens. As printed on the label.
- Country of manufacture and brand address. Tells you which labelling regime the product follows.
- Expiry policy. Usually a stated minimum on arrival.
- Third-party testing. Some retailers run their own product testing programmes and mark tested items; some brands carry Informed Sport, NSF or USP seals. What supplement seals actually certify explains what each seal does and does not check. A retailer’s own testing badge is a separate programme with its own scope, and the retailer’s description of it is where to read what it covers.
- Reviews. Useful for shipping experience and taste; not a source of information about what a product does.
What this site links to, and why
Where an article on this site links to a product at a retailer, the link may be an affiliate link, disclosed at the top of the article and explained on the Affiliate Disclosure page. The link is there so that you can see the label panel and the current price on the retailer’s page; it is not a recommendation that the product is right for you, and this site has no financial interest in which retailer or which product you choose beyond that disclosed commission.
Checklist before ordering from another country
- Read the label panel on the product page, in absolute amounts, and convert units if needed.
- Check the formulation against the local version if you have used it before — it may differ.
- Total the delivered cost, then compute cost per unit of the active ingredient.
- Check your own country’s personal-import rules and the retailer’s ship-to list for that product.
- Read the storage instruction and the retailer’s minimum-expiry policy.
- Inspect seals and the best-before date on arrival.
- If you take medication or have a medical condition, check the ingredient list with a pharmacist before ordering, not after.
Sources
- U.S. Food and Drug Administration, Dietary Supplement Labeling Guide — for the Supplement Facts panel format.
- European Union Regulation 1169/2011 and Directive 2002/46/EC — for EU food supplement labelling and Nutrient Reference Values.
- Therapeutic Goods Administration (Australia) — for the listed-medicine (AUST L) framework and personal importation scheme, which readers should consult directly for current limits.
- Retailer policies referred to in general terms are those published on the retailers’ own help pages at the time of writing and should be checked before ordering.
This article is a guide to reading packaging and comparing products. It is general information only and is not medical advice. It makes no claim that any supplement benefits any condition, it recommends no dose, and it does not diagnose, treat, or cure any condition. Speak with a qualified healthcare professional before starting any supplement.