Daily Health Digest
Riboflavin on the Label: Why Vitamin B2 Deserves a Second Look
By Only Health Editorial Team
Vitamin B2 is often buried in a B-complex panel. This New Zealand label guide explains what riboflavin does, how to compare a daily dose with reference values, where food fits, and when symptoms or a high-dose plan need clinical advice.
Thiamin on the Label: Why Vitamin B1 Is More Than an Energy Claim
By Only Health Editorial Team
Vitamin B1 appears in multivitamins, B-complexes and energy products, often with a much larger dose than the daily reference value. This guide explains the forms on the label, food sources, New Zealand rules, who needs clinical advice and why a high number does not diagnose a deficiency.
Niacin on the Label: Why Vitamin B3’s Form and Dose Matter
By Only Health Editorial Team
Niacin can mean nicotinic acid or nicotinamide. They share a vitamin name but behave differently at supplement doses. This guide explains label terms, daily reference values, flushing, high-dose risks and the checks worth making before adding another B-complex.
Copper on the Label: The Mineral Zinc Supplements Can Quietly Deplete
By Only Health Editorial Team
Copper rarely gets its own bottle, but it sits in multivitamins, joint formulas and high-dose zinc regimens. This guide explains elemental copper, the zinc interaction that can drain it, who is genuinely at risk of too little or too much, and what New Zealand rules say about the numbers on the label.
Potassium on the Label: When a Small Number Needs a Second Look
By Only Health Editorial Team
Potassium is essential, but it can be hidden in electrolyte products, joint supplements and low-sodium salt substitutes. This guide explains elemental potassium, the label details that matter, and why kidney function and medicines can change a routine purchase decision.
Vitamin A: Why More Is Not Safer on This Label
By Only Health Editorial Team
Vitamin A supplements are sold for eyes, skin, and immunity, but this is the one vitamin where a large dose can be harmful within weeks. Two cancer-prevention trials stopped early after high-dose beta-carotene and retinol raised lung cancer deaths in smokers, and New Zealand caps supplement retinol at 3,000 mcg a day. Here is what the evidence supports and how to read a bottle before you buy one.
Chromium: What Blood Sugar Supplement Claims Get Wrong
By Only Health Editorial Team
Chromium picolinate is sold across New Zealand pharmacies and supermarkets on the promise of better blood sugar control, yet the American Diabetes Association does not recommend it, the mineral has no confirmed deficiency in healthy people, and regulators still track open genotoxicity questions about the picolinate form at high doses. Here is what the research actually supports, what New Zealand's label rules require, and how to read a chromium bottle before you buy one.
