As anyone who’s ever tried to lose a significant amount of weight can tell you: the process is not easy. From changing diet and exercise routines to dealing with insatiable cravings, it takes a high level of motivation and dedication to be successful.

Shape magazine recently highlighted six women who’ve lost a combined 603 lbs., asking them to each share one tip in an effort to help other females beginning their weight loss stories.

See their inspiring photos and jot down their useful tips below!

Peggy Bradford — Age 47

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Courtesy of Shape magazine

Peggy successfully lost 73 lbs: “I used to leave the dinner table feeling stuffed. Now I stick to a single serving of everything, and if I’m still hungry, I’ll eat a piece of fruit.”

Stephanie Merchant — Age 44

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Courtesy of Shape magazine

Stephanie successfully lost 50 lbs: “One of my favorite books is Michael Pollan’s ‘Food Rules.’ The tip I live by: If your third grader can’t pronounce it, you shouldn’t eat it.”

Caitlin Flora — Age 32

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Courtesy of Shape magazine

Caitlin successfully lost 182 lbs: “I discuss my weight-loss struggles, such as finding the energy to work out after a long day, and triumphs on my Facebook page. The process is so therapeutic for me.”

Christine Samuelson — Age 44

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Courtesy of Shape magazine

Christine successfully lost 125 lbs: “Going from 2,500 calories a day to about 1,450 by ditching the drive through, avoiding processed foods, and replacing six-sodas-a-day with water.”

Amy Plummer — Age 35

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Courtesy of Shape magazine

Amy successfully lost 105 lbs: “I invest in high-quality athletic clothing. The performance-grade fabrics keep me dry and comfy so it’s easier to exercise longer.”

Libby Westphal — Age 45

shape

Courtesy of Shape magazine

Libby successfully lost 68 lbs: “Hiring a trainer helped Libby drop 14 pounds and overcome her plateau before entering a bikini competition where she placed 8th in her age group.”