I first used this product when recovering from pneumonia. My energy was completely depleted and Oxylift really helped in my recovery. I was also concerned that this winter I would be very vulnerable to colds etc and (fingers crossed) so far I have stood strong whilst watching those around me all fall ill! Finally now having been taking it for a few months I can say I have more clarity of thinking and think that it is a great all round product. Thanks for the recommendation!