Quick answer
New Zealand regulates dietary supplements under the Dietary Supplements Regulations 1985, administered by Medsafe. There is no pre-market approval — Medsafe does not test or approve products before sale. Legal responsibility sits with the sponsor, the company placing the product on the market, to ensure it is safe and compliant with labelling and dose rules.
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Dietary supplements are regulated under the Dietary Supplements Regulations 1985 (under the Food Act 2014), administered by Medsafe.
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There is no pre-approval or pre-market testing process — a supplement being legally for sale does not mean it has been independently verified.
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The "sponsor" (the company or person placing the product on the market) carries legal responsibility for its safety, quality and compliance, including label claims.
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This is different from medicines, which go through a separate approval pathway and cannot claim to treat or prevent disease unless registered as such.
What law actually covers supplements in New Zealand?
Dietary supplements are defined and regulated under the Dietary Supplements Regulations 1985, a set of rules that sits under the Food Act 2014. Medsafe (part of the Ministry of Health) administers the dietary supplements regulations specifically, while the Ministry for Primary Industries oversees the broader Food Act.
These regulations set out matters such as labelling requirements and maximum permitted daily doses for a number of vitamins and minerals. They are deliberately more limited than the regime that applies to medicines.
What does "no pre-approval" actually mean for shoppers?
Medsafe is explicit that there is no pre-approval process for dietary supplements in New Zealand: products are not assessed for compliance before they can be sold. This is a meaningful difference from how prescription and many over-the-counter medicines are regulated, where a product must be approved before it reaches shelves.
In practice, this means a supplement being legally available in a New Zealand shop, pharmacy or online store tells you it has not been banned or recalled — it does not tell you that a government body has independently verified its ingredients, dose accuracy or health claims.
Who is actually responsible if something goes wrong?
Responsibility sits with the "sponsor" — the person or company legally responsible for placing the product on the New Zealand market. Medsafe requires sponsors to declare that their product complies with dietary supplements law, but does not independently verify every declaration before sale; audits and compliance checks can happen after the fact.
This is why reputable brands, transparent labelling and, where relevant, independent batch testing (see our guide on drug-tested supplements and Informed Sport) can matter more than marketing claims when comparing similar products.
How is this different from a medicine?
A dietary supplement is intended to supplement the diet and cannot lawfully make a stated or implied therapeutic claim to treat, cure or prevent a disease — doing so would move a product into medicine regulation under the Medicines Act 1981, which requires a formal approval (consent) process before sale.
If a supplement label or seller claims it can diagnose, treat or cure a medical condition, that is a signal worth questioning rather than a sign of stronger evidence.
People also ask
Frequently asked questions
Does the New Zealand government test supplements before they go on sale?
No. Medsafe states there is no pre-approval or pre-market testing process for dietary supplements in New Zealand. Legal responsibility for safety and quality sits with the sponsor placing the product on the market.
Who is legally responsible if a supplement is unsafe or mislabelled?
The "sponsor" — the company or person who places the product on the New Zealand market — carries legal responsibility for its safety, quality and compliance with the Dietary Supplements Regulations 1985.
How is a supplement different from a medicine under New Zealand law?
Supplements are regulated more lightly than medicines and cannot lawfully claim to treat, cure or prevent disease. Medicines go through a separate approval (consent) process under the Medicines Act 1981 before they can make such claims.
Evidence and further reading
This guide provides general education, not diagnosis or individual medical advice. Follow product labels and speak with an appropriately qualified health professional when you are pregnant, nursing, taking medication or managing a health condition.
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