My skin tingles when I apply Nrj-Soin Serum. Is it normal?

Yes, light tingling is a normal reaction. Nrj-Soin Serum contains a high concentration of low molecular active ingredients, most of which have anti-oxidant properties and can quickly penetrate into the deeper skin layers forming a shield against free radicals and other toxic agents. The anti-oxidant cocktail saturates the skin with such speed and intensity, it that causes a bit of tingling which is sure to pass in less than a minute.