Heidi Klum in Bathing Suit Say "YES" in Hot Tub

Heidi Klum is kicking off 2023 on a cheeky note! The 49-year-old supermodel flaunts her forever young figure – including her perky backside – in one of her latest social media snaps. In it, she wears a red swimsuit as she kisses her husband, Tom Kaulitz, in a hot tub. "YES 2023," she captioned the Instagram post. How does she stay so fit at almost 50? Read on to see 5 of Heidi Klum top diet tips and tricks for staying in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

Klum has a secret food for longevity: Anything pickled or fermented. One of her favorite dishes? Her family's sauerkraut soup recipe. She also drinks a shot of apple cider vinegar in the morning. There is some scientific research supporting the health benefits of fermented foods, including antioxidant, anti-microbial, anti-fungal, anti-inflammatory, anti-diabetic and anti-atherosclerotic activity. 

Klum claims to know a secret about digestion. "Maybe this doesn't work for everyone, but I learned in this clinic that I went to for two weeks with my husband because he had these horrible headaches, is that you're not meant to drink anything while you eat," she said during an interview. "Not a half an hour before, not during, not a half an hour afterwards. So you're supposed to drink throughout the day, but not when you are eating because it dilutes our stomach acid. And then the stomach acid is too weak to break down the food. So that's important."

Klum also claims that avoiding raw food at night also promotes healthy digestion. "So no raw vegetables, you know, like carrots or anything like that," she explained in the same interview. "It is terrible to do that. Same with fruit or salad. So in the past I've always been chowing down on salad, but what happens is when you lay down at night, you go into rest mode and your poor stomach and your intestines need to rest. So if you're doing all these things like that, it can't rest. So it's super busy getting through all that uncooked food."

Klum prefers dining in to going out to restaurants. "I don't really eat out a lot," she told Entertainment Tonight. "I think when you eat out  a lot or order food in a lot, it kind of gets a little tricky because you don't know what people are putting in there."

Heidi eats healthy – most of the time. "I try to eat as healthy as I can," Klum dished Harper's Bazaar Malaysia. "We have a big vegetable garden and every night we make a giant salad from it for dinner. When I am working, I try to fill up on snacks l enjoy like fruit, greek yogurt or almonds instead of chips and cookies from the craft service table. But, don't get me wrong, some days there is nothing better than a Big Mac, fries with mayo and a Coca-Cola!"