Susan Niebergall didn't get ahold of her nutrition until her 50s.Susan NiebergallSusan Niebergall worked out for decades but didn't lose fat until she addressed her nutrition.Niebergall, now 63, prioritizes protein and daily movement.Aging doesn't necessarily lead to weight gain, and it's never too late to make healthy changes.Susan Niebergall couldn't understand why she struggled to get in shape despite trying all sorts of diets and working out regularly for decades.It was only when the school counselor turned personal trainer stopped thinking of herself as a victim and committed to learning about nutrition that she started losing weight sustainably and achieving her goals in the gym, she told Business Insider.Niebergall was surprised that it wasn't until after the menopause — when she thought she would naturally gain weight — that she finally started making progress.Over the course of a couple of years, she lost around 28 pounds (she can't say for sure because she didn't own scales at the time and was also trying to build muscle, so wasn't focused on her weight) and she's stayed around the same weight for over seven years.