From Chris Evans
Your article on “superfoods” refers to some fatty acids as “omega 3s” (6 August, p 27). The correct name is “omega-3”, the “-” being a minus sign. In these fatty acids there is a double bond between the third and fourth carbon atoms from the “omega” carbon at the end of the chain. Correct terminology might even prevent any misconception that omega-6 fatty acids are twice as good for you.
Earby, Lancashire, UK
