Yes, absolutely nuts are fatty. You are quite right. And here is how fatty (yet healthy) food works to reduce weight:
They found that people who ate an extra portion of yoghurt daily, compared to the study group as a whole, lost on average 0.82lbs (0.37kg) every four years, over a 20 year period.
For nuts the comparable figure was 0.57lbs (0.26kg), for fruits 0.49lbs (0.22kg), for whole grains 0.37lbs (0.17kg) and for vegetables 0.22lb (0.1kg).
The authors, led by Prof Dariush Mozaffarian, noted that this did not mean people could simply eat large amounts of these foods and lose weight.
"Obviously, such foods provide calories and cannot violate thermodynamic laws," they wrote in an article published in the New England Journal of Medicine.
However, people who ate them tended to eat less calorie-dense foods such as chips, meats, desserts and sugary drinks.