non gm source,easy to take pure soluble powder,add to drinks for a sharp refreshing taste,great value at less than 4p/graml-ascorbic acid powder is the scientific name for vitamin c and this pure powdered crystal form is the most economical way to buy vitamin c. it is also the easiest to use as it can be added to drinks where it is fast dissolving. this non-gmo product has a refreshing sharp taste similar to acidic fruits such as lemons and limes, and can be used to sharpen the taste of drinks such as squashes.this product is a great way to take a lot of vitamin c without having to swallow loads of tablets. we always recommend that any one taking high daily intakes of vitamin c should divide their intake in to several small doses throughout the day. this minimises the risk of gastric upset, and importantly helps to ensure that blood levels are kept constantly high.