Woman credits Instant Pot for her nearly 80-pound weight loss

Dr. Jennifer Ashton also weighs in on how eating home-cooked meals made all the difference for one woman who had been struggling to shed pounds.
3:57 | 12/05/17

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Transcript for Woman credits Instant Pot for her nearly 80-pound weight loss
Now to our "Gma" cover story about a mom that's inspiring so many. She is using one of the most popular holiday gift, the instant pot to shed more than 100 pounds and save money. Here's how she did it. Growing up Brittany Williams was a serial fast food eater. From the very young age our diets just weren't stellar. Reporter: Packed on the weight topping out at 260 pounds in 2012 and after trying all sorts of diets she decided to start cooking with a trendy cooking device her husband got her called an instant pot. It makes cooking healthy food fast and that's what I was missing. I was missing the convenience factor. Reporter: In instant pot is an electric pressure cooker which makes food very quickly unlike a crock pot which can take four to six hours for a meal. That's what makes it special. You can have 30 minutes till dinnertime, throw everything in your instant pot and make it to the dinner table in time. Reporter: In 2017 she made it her goal to cut out all processed foods from her diet and cook her meals in the instant pot every day. Now she's lost almost 80 more pounds. And Tiegs are my shorts from last summer. Brittany says she's not great at planning meals but knew eating well can only be sustainable if it was convenient. Her success with the instant pot was, well, instant. And last April after losing 40 pounds in 4 months she shared this post on Facebook writing, in January I kicked processed food and eating out to the curb. I was confident with my instant pots, I have two now, we could successfully stop eating out. Well, we're doing it. The reaction that I got was overwhelming. Reporter: Now she feels the instant pot will not only keep her weight off but give her kids a legacy of healthy eating too. It makes me feel an immense sense of pride for how far I've come. And we are joined now by our chief medical correspondent Dr. Jen Ashton. Thank you for joining us. Always love these segments. People are always trying to lose weight and want to lose it in the right way. You have a degree in nutrition. What does the science say about the best approach. I love this story because it shows one person's success but the reality is any diet can work short term. It's keeping it off long term and we know that unfortunately at the two-year mark about 85% of people are back up their starting weight because our body wants to restore its equilibrium to its heaviest point. My medical advice for anyone who wants to lose weight is it needs the three Ss. Needs to be safe, it needs to be simple and sustainable long term and I think that's what this woman's story shows. This was sustainable for her. And so her approach, you feel like, works. Right. But what could be some of the downsides. There's nothing magical about the instant pot. When you talk about any kind of cooking device the advantages are you're avoiding all the excess salt, sugar, oils that can go in processed meals. It could potentially be healthier and the downsides are minimal, the time, effort and cost of the machine but I do believe you could probably save money with this. She says she stopped eating processed foods. Yeah, I mean, look is super convenient and I'm all about the convenience and laziness factor but they're loaded with sodium and sugar and hear it over and over again and need to remember for people with true obesity, severe obesity who are having problems there's a big push now from the medical weight loss aspect of this to really aggressively treat this before it causes the other symptoms, so I think that people with those issues, especially if you are struggling with high blood pressure, joint problems, diabetes, sleep apnea, you need to seek medical advice because this is a very serious situation. Yeah. But I love this method. I love this method too and she looks great. We always love your advice on this.

This transcript has been automatically generated and may not be 100% accurate.

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