(KPRC) Research on people who eat nuts shows they may be helpful in controlling weight, but some are better for you than others.

Dietitian Erin Gussler says the trick is to limit nuts to one handful at snack time.

"Most people don't want to get out measuring cups and things like that, so I usually say a handful...not the claw, where it's overflowing, but a handful," Gussler says.

Her favorite nuts are Brazil nuts for their disease-fighting attributes. These have more selenium than any other nut, a mineral important for thyroid function and reproduction.

"High doses of selenium can actually cause toxicity, so I usually recommend if you are going to do a Brazil nut, three to six a day is the recommendation," she warns.

Gussler says most nuts are great to get your micronutrients. In addition to protein, fiber and healthy fats, nuts also supply decent amounts of magnesium, potassium and vitamin E.

Read more on KPRC's website.