Lemsip if people afford to purchase these expensive so-called vitament supplements, then they can afford to eat properly. If, due to age or infirmity, they find it difficult to cook, etc,. then there are many good companies out there from whom they buy in their meals. Cheaper and better than these pills.
Anyway, there check-ups at GP's would pick up any vit.deficincies they really had and would then be prescribed appropiate treatment for this.
To me these over-the-coutner pills are similar to the homaepathic bottles of water - just a psychological sop to people. But these vit pills can be more dangerous - do hope anyone taking any of them informs their GP, as they can have serious side-effects and actions with their properly prescribed medications.