South Africa, Feb. 3 -- At 18, holding hands with my first girlfriend, I was - I now realise - living at a time when there were much fewer temptations to become a 'couch potato' - no internet, no social media, and TV only ran for a limited time every day.

It was also a time before "Big Food" started mass producing the junk we consume on a daily basis.much of it containing sugar or cornstarch.

Big Food went hand-in-hand with fast food, and the super-sizing of these cheap convenience foods is what helped make America, and many other countries, obese societies.

When sugar stops being sweet

But sugar can also be a killer, or a crippler. That much is evident in the hard-hitting public service campaigns for heala.org.za - the Healthy Living...