Effectiveness differs not just between brands yet also for flavorings of the very same brand. Firms like Flavourart as well as Inawera are well-known for their potent focuses, where 1-2% is sufficient to dominate a recipe-- however also some of theirs can be made use of in the 5-10% variety. A great indicator of potency is the "average mixing quantity" percent, which can be discovered on each taste's web page at ELR.
http://remingtonacsc620.yousher.com/low-cost-vape-juice