Key points from article :
Slim people may be lean as the result of genetic advantage.
We may be able to target genes to find new weight loss strategies.
74% of lean cohort had a family history of being thin.
We have far less control over our weight than we might wish to think.
Though external factors can impact on a person's weight.
These include easy access to high calorie foods and sedentary lifestyles.
Cambridge University examined DNA of 14,000 volunteers.
The study was published in the journal PLOS Genetics.
