If you're prepared to - or are preparing to - fork out the extra cash and go organic in your eating, it may be what you're not paying for that will do you the most good. Pesticides, for example.
Immunologist, restaurateur and organic food advocate Dr Robert Warlow is adamant that they are one of the big threats to our health.
"Pesticides by and large have extremely long half lives that are measured in years, not in days or even hours," Warlow says.
"Very few if any are biodegradable, and moreover most are finely lipid soluble [dissolve in fat] - one of the reason they're so effective as metabolic poisons. They invariably get deep inside cells to the point they get into and bond to or damage DNA. That's how they exert their toxicity."
