We spend millions of dollars each year on products we're told are good for us, but does the science behind this industry raking in multi-millions really back up the claims?
Documentary
51 minutes
2016
Paul Barnett
BBC

2017
0.0

1946
4.6

2017
0.0

2014
6.8
2010
0.0
2007
0.0

2011
8.0

1973
0.0

1895
5.5

1988
6.9

2012
6.3

2022
6.5

2015
0.0
2011
4.7

2013
6.7

2018
0.0

1987
6.0

2014
7.8

2019
0.0

2011
3.0