Harvard University says  could be a  aid. It said we could replace  snacks with nuts to slow down  gain. People  ate 14g of nuts  day gained less weight than  who ate unhealthy snacks. However, eating nuts and  unhealthy snacks reduced weight  by  0.4 to 0.7kg over four years.
The researchers' looked at the  of 190,000 health  and nurses over twenty years. Researchers asked them  every four years about their weight, , and how  they ate nuts. A  said nuts  help reduce weight gain as  get older. It might also  the chances of .