We didn't get any vitamin pills either. Within 3 weeks, I had lost over 13Kgs in weight and my waist had dropped from 32 to 27 inches.
In addition to starvation, sleep deprivation, pressure positions, regular beatings, motion induced vomiting, waterboarding and a host of other daily activities, we were also made to run about 20-30km every day. We could literally see ourselves wasting away every time we looked at our reflection.
Toughest days of my life. But they give you a feeling of infallibility afterwards, I had a huge confidence boost after living through all that. I felt if I survived all that, I could survive anything. No hunger was debilitating after that, no fatigue was too tiresome. I also learnt how painful time could be, I used to often say "I don't have the time for X,Y,Z"; after undergoing my survival course however, I knew just how long 24 hours can be, an eternity can be brought to bear in that time.