India, Aug. 1 -- If you're a true beer head, 'wasting' a can on your scalp may sound blasphemous. But then again, there's maybe a reason why the beer shampoo wave never really crashed.

'Because it works' should be the expected answer but then again, does it really?

Yes of course you can Blink It one of those sleek looking beer shampoo bottles right away, but a cup or so of beer - doesn't even have to be fresh, stale apparently works just as good - mixed in with your regular shampoo is the only trick you really need. Feeling a little extra gunky on the scalp? Add a splash of apple cider vinegar to the mix and watch the magic happen.

But that's the thing. Where is the magic behind this pretty strong reputation the pub staple choice of (d...