Lead: don't think it is enough for anti aging after choosing good essence. The best using of essence will double its efficacy comply with five golden rules as follow:
Rule1: read the instruction carefully
The manual is telling you the most appropriate dosage and even precise to "drop". So, we should read the manual carefully before using that reach the most effective result. Due to the excessive nutrition of essence will lead allergies.
Rule2: do skin test before mix using
Due to the concentration of essence is higher than other products. So, we have to do the skin test by applying ear before mix using, Otherwise, it is easy to have allergic phenomenon.
Rule3: the special essence should be distinguish using
The anti-aging essence contains high concentration of pure vitamin A which can promote the generation of cell. But, it must be used in the evening and avoid the light.
Rule4: household apparatus
The household apparatus will magnify the efficacy of essence to maximum due to its titanium guide head and ultrasound can place essence into deep skin quickly. 
Rule5: learn use the import EX
Possess the function of "IONTOPHORESIS-TYPE" that make essence more effectively to be placed into skin, increasing micro-circulation.