Even a Kids' Zinc Sunscreen Failed Its SPF Claim in 2025
An SPF number is a promise, not a guarantee, and a 2025 Australian test shows why even a trusted kids' zinc sunscreen can underperform, plus what that means for application.
In June 2025, Australian consumer group CHOICE tested 20 SPF 50/50+ sunscreens and found 16 did not meet their claimed SPF; among them, Cancer Council Clear Zinc Kids SPF50+ returned a measured SPF of 33, triggering a wider Therapeutic Goods Administration review.
Dermatology guidance notes that mineral filters like zinc oxide are effective but only when applied thickly and evenly, so a real-world reading below the label often reflects formulation or application factors rather than zinc being inherently weak.
Questions we get a lot
Are mineral or zinc sunscreens more reliable on SPF?
Not automatically. CHOICE's 2025 test found Cancer Council Clear Zinc Kids SPF50+ measured only SPF 33, showing mineral formulas can also fall short of their label. Zinc oxide is an effective filter, but performance depends on formulation and on applying a thick, even layer. The mineral label alone does not guarantee the printed SPF.
What did this test mean for regulators?
The shortfall in a popular kids' zinc sunscreen helped trigger a wider Therapeutic Goods Administration review, as reported by SBS News. That means the issue was treated as worth official investigation rather than a one-off. For parents, the practical takeaway is to apply generously and reapply often regardless of the SPF on the bottle.
r/SkincareAddiction: 'I switched my kid to a zinc sunscreen thinking it was the safe choice, now even that failed a test?'