The conclusion was made by scientists from the United States. They conducted a study in which they took a blood test from the finger at the volunteers. Each time got a different amount of biological material. Depending on the amount of collected blood were changed and the results of the overall analysis.
Scientists have found that reliable results can be obtained only on the level of sugar in the plasma. Viral and bacterial diseases as hemoglobin level, blood from the finger is very difficult to determine. This analysis provides only indicative information.
With the information gathered, the researchers came to the conclusion that the analysis requires at least six drops of blood, and all the research one drop should not claim for objectivity and accuracy.