In 2013 new, tighter accuracy standards (ISO: 15197:2013) were drawn up, requiring that 95% of blood glucose results should reach the following standard.4.6 today. i am sure these test stips are not accurate sometimes. 3 different readings this morning. 5.3 then 4.4 and finaly 4.6. Bloods at 9.15 last night was 4.9 so went with the 4.6. Have a good one everybody