The B|Africa Instant Revitalise Gel can be applied as many times as needed. Use the gel on areas of concern only.
A small amount of gel can be applied on the temples and the sinus area when suffering from a headache - avoid eye contact at all times.
Not at all, both gels offer similar benefits and results. The reason that the B|Africa Instant Revitalise Gel is more affordable is that it is a South African product.