At first sign of illness I started with the B-12 and B Complex 1 amp every other day. For the first 5 days then. Then after was a maintance dose of 2 amps of B, 1 of complex a week. Couple this with one shot of E every week and my illness didnt keep me down.
The B12 gives a almost immediate and noticable uplift in energy , mental alertness, and overall well being.
As for the Complex and E. I used them to cover the bases and Im glad I did and I truly feel my recovery was aided tremendous by utlizing these injectable vitamins. Also worthy to note that while B can be taken in adbundance, one has to be very careful with E not to take too much or risk damaging your health.