you can buy them in most chemists (although some wont sell them if its for use whilst on a diet) or ebay/amazon. I personally dont use them. For me if i stick to it i will get in ketosis and i dont need a stick to tell me that lol. I get the same as above....mornin breath that lasts ALL DAY haha, metallic taste in my mouth but on the up side i get more energy and less hunger pangs. You usually can tell instantly when youve went into ketosis cos the difference is great