This can means that sudden ceasing curative measures on the onset of physical relief may lead to the recurrence and persistence of the infection. Each spray has a different purpose, Anti-Aging for cell renewal and heart health, Multi-Vitamin for core nutrition and immunity, Vitality for energy, stamina and libido and S.L.I.M. for healthy weight management. I've personally tried each one and I have to say they are very easy to use, simple to carry around and taste great, in fact the weight loss one is really delicious! You do have to hold the bottles upright as you spray, or they can dribble a bit, but once you know this you make sure you get it right.