How to read a sleep supplement label in New Zealand
The front of a supplement bottle is marketing. The back is the contract. Most people choose sleep formulas from the front, which is like choosing a house from the letterbox, so here are the five checks that take you around the back. None of them needs any chemistry.
1. Find the serving size before you read any number
Every dose on the panel is per serving, and a serving might be one capsule, two, or three. A bottle boasting twice the magnesium of its neighbour may simply be asking you to swallow twice as much. Sixty capsules at two per night is a month, not two. Do this arithmetic first; every other number on the label depends on it.
2. Minerals: demand a form
"Magnesium" tells you almost nothing. Magnesium oxide, citrate and glycinate behave differently enough that the form is most of the purchase decision, and the label number should be elemental mineral, not the weight of the whole compound. A label that names its form is showing its working. A label that just says magnesium is hoping you will not ask.
3. Herbs: look for the ratio
Herbal ingredients often carry a ratio like 10:1. It means the stated weight is an extract concentrated from roughly ten times that weight of raw herb, so 300 mg of a 10:1 passionflower extract represents about 3,000 mg of plant. This cuts both ways when comparing: 300 mg of a 10:1 extract and 300 mg of plain dried herb are not remotely the same thing, though the two panels look identical at a glance.
4. Beware the blend that will not show its working
Some labels list a proprietary blend: a poetic name, a total weight, and no individual doses. This is legal in much of the supplement world, and it tells you the one thing you most need to know is being withheld. A blend can be 95 percent of its cheapest ingredient and still wear the total weight proudly. Stated per-ingredient doses are the transparent alternative, and any brand confident in its formula has no reason to hide them.
5. Read the warnings box like a review
Counterintuitive but true: the warnings are where a formula tells you it expects to do something. Who should not take it, what it should not be combined with, when to check with a health professional first. In New Zealand, dietary supplements may not claim to treat any condition, which is why careful labels speak in the language of support rather than promises. A label with plain warnings and modest claims is usually the work of people playing a long game.
Run those five checks on any shelf in the country and most bottles will sort themselves quickly. To take one example from this series: Koru Sleep prints all seven of its ingredients with per-serving doses, names its magnesium form (glycinate), and states its herbal extract ratios, which is the back-of-bottle behaviour the checklist is asking for. Wherever you land, the habit is the point. Front labels are written for the person the brand hopes you are. Back labels are written for the person who checks, and that person gets better bottles. If you are still deciding what should be in the bottle at all, start with our honest guide to choosing a sleep supplement in New Zealand.