Health campaigners are calling for a loophole to be closed that allows a nicotine product to be sold over the counter and online to under-18s.
Nicotine pouches - small parcels of nicotine that fit under the lip - are sold in most UK supermarkets.
But while the sale of cigarettes and e-cigarettes is forbidden to under-18s, pouches are not regulated in the same way.
Action on Smoking and Health (Ash) says the lack of rules is a "Wild West".
Nicotine pouches are not regulated under rules that cover tobacco or vaping products, or as a medical product.