CLEVELAND, TN (WRCB) -- Some of your favorite chocolate is about to change. Candy giant Mars, Inc. is slimming down its products in an effort to help its customers slim down.

Snickers, Twix, Milky Way, and M&M's are all made by Mars, Inc. Much of it is made by local men and women at the factory in Cleveland, but a push for "responsible snacking" has these tasty favorites about to shrink and that's getting mixed reviews.

"Twix is my favorite," Cathy Boyd says.

Some candy bar enthusiasts think Mars' idea to reduce the size of each is out of this world.

"We all need to live a little healthier," Boyd said.

Others disagree.

"It's silly. If you need to cut back on calories, then just east less, but I mean it's a candy bar. It's for enjoyment," Amy Honaker said.

Over the next couple years the company plans to eliminate trans fat, reduce saturated fat and manage portions and calories. That means no more king sized goodies. Regular sized candy bars will come in less than 250 calories each.

"Basically it's 30 calories difference or about three cubes of sugar less in the new bar than the old bar," Dietitian Pam Kelle said.

Kelle says there's already a debate brewing over this first ever move by a candy company to control portion sizes.

"Whose decision does that really need to be-- the food manufacturer or the education of american people to understand that we've got to limit the amount of simple sugars that we take in," Kelle said.

She says there's one main reason American's are getting fatter.

"Most people will eat whatever is put in front of them," Kelle said.

That's why hammering home the idea of portion control is her number one goal.

"When we think of what a portion of food is versus a serving, if we can really get our eyes to see what that is, the better off we're going to be in the long run.," Kelle said.

Others Channel 3 spoke with say they'd rather see the actual candy bar be healthier as opposed to smaller.

"Hopefully they'll make a healthier version," Paul Bunch said.

"I just think it would be good if they are healthier so that way kids can have something too," Martha Zumstein said.

Over the last couple of years, Mars has been the first candy company to list the calories on the front packaging and stop marketing to kids under 12. All Mars brand candy bars will shrink by the end of next year, but the company isn't saying yet, whether the prices will also shrink.