I have few questions that casts a shade of doubt on (studies of) using multivitamins.

- How many of those (multi)vitamins are thermally unstable?
- How are multivitamin pills and powder produced/processed?
- Are studies that prove inefficiency of taking vitamins in isolated form taken into consideration?

Many (if not all) micronutrients need their ‘counter’ (or paired) elements to be efficiently utilized. We can find them in such pairs in their bioactive form.
A good example is water. Water cannot be properly utilized without electrolytes. If we drink electrolyte-poor water, it will use up our body’s own electrolytes supplies to link and absorb water into cells.

Perhaps researching studies of differences between using, for example, Vitamin C in citrus fruits or its processed powder form would be interesting to consider.

I would also keep in mind that any statistical study can prove anything we want, if we are free to chose preferred sample and method. (not my statement but of professor of statistics)

I believe that Roy’s title is highly subjective and relative.
Are multivitamins any good? It’s relative to what form we refer to and good for what. Labelling something as good is always a subjective and relative decision.
Is it good to fall off a bike? It is, if it’s vital to understand and master the skill. You can’t master riding a bike until you fall off a few times.