Since iherb have increased their shipping charges for those outside of the US, I have been looking for an alternative source and have found this one: http://uk.evitamins.com/magnesium-oxide-now-34058#.VMypQS6wEdU I have highlighted Now's magnesium oxide to compare the cost of buying it here: http://www.amazon.co.uk/Foods-Magnesium-Oxide-Powder-Ounce/dp/B00NR1T6F4/ref=sr_1_1?ie=UTF8&qid=1422698863&sr=8-1&keywords=now magnesium oxide powder Wow that's a steep increase! Look at the shipping cost! If you keep to under £15 you won't pay import tax and customs charges. I have just ordered 4 x magnesium oxide which was well under £15 and with shipping costs of £8 something it still came to half of what it would have cost here. No doubt it will take longer than iherb (which was 2 days last time). If you want to use a $5 off code it is 1024650.