from the FAQ: Serum apparently offer 3 alternative methods. They offer a similar method to Dr Gorgy and Dr Tsagaris using about 20mls of paternal blood, or they offer a 'double dose' of 40mls, or their preferred method is to start with 20mls, separate out the white blood cells and then culture them in the lab for 24-48 hours to increase the cell concentration and then give the LIT. They prefer to spread the injections out over your body as they say this gives less chance of scarring and a bigger effect on the immune system. Typically they inject in both upper outer arms and on the hip. They only offer paternal LIT.