Zoe Harcombe did a PhD on the evidence that eating saturated fat is bad for you and leads to heart attacks – she found no such evidence.
Peer reviewed literature suggests that meat and saturated fat are good for you – refined vegetable oils are bad

Malcolm Kendrick shows data was cherry picked and manipulated to suggest that eating saturated fat caused high cholesterol which caused arterial clogging which caused heart attacks.
The trouble is – none of these claims are true.

Ivor Cummins explains that vitamin D is helpful in preventing or curing almost all chronic illness – low fat diets will kill
See also Vitamin D Wiki

Dr James DiNicolantonio looked at the evidence that reducing salt intake has health benefits but found that the complete opposite was true