I have put an extract below briefly explaining why Intellicig and myself chose to change nicotine levels in eliquid.
Research has indicated that when using lower strengths, users often take more frequent draws on an electronic cigarette than they would normally on a tobacco cigarette, resulting in a greater daily intake of Nicotine. When using the 'new' strength, there is more of a tendency to take just a few draws and then have a break of 40 to 60 minutes, which mimics more closely the Nicotine delivery from cigarettes.
Nicotine enters the bloodstream at a similar rate as cigarettes and the higher strength means that the 'Nicotine hit' is like that of a cigarette. Because Nicotine stays in the system for around 40 to 60 minutes then degrades quickly, the effect closely resembles cigarettes and reduces the overall daily intake.
Many users who were accustomed to using lower strength liquid indicated that although it satisfied the habitual requirement, it often didn't fully satisfy the Nicotine craving, so they would use it more often. Feedback gathered from experienced electronic cigarette users who have sampled the 'new' strength option has been extremely positive, with many confirming they have been taking less inhalations per day and have found the experience more similar to that of traditional smoking.
With just a little effort, it is quite easy to modify your habit to one that offers a more realistic sensation of smoking and Nicotine delivery.
Best wishes
John