The Health Sciences Authority (HSA) has warned the public that it is illegal to purchase and use vitamin diffusers.They are classified as «imitation tobacco products» and banned in Singapore as a result, said the authority on Wednesday (Sept 24).It was responding to recent concerns over such diffusers being marketed online as «healthier alternatives» to e-vaporisers.Often promoted via influencers and online advertisements, these products claim to contain substances like caffeine, vitamin B12 and melatonin.A check by AsiaOne showed that some sites which sell such devices offer shipping to Singapore, stating that it is the consumers' responsibility to ensure they follow the laws of their country of residence.Despite looking harmless, such devices could contain substances that are not intended for consumption — which could lead to long-term health risks, said HSA, adding that such products may also serve as a gateway for users to experimenting with cigarettes or even hard drugs.Youths are particularly vulnerable to such risks, it said. Read more