There are few constants within the world of weight loss, but one concept holds up: No matter how you lose weight — through restrictive eating, bariatric surgery or the new, buzzy class of injectable medications like Ozempic and Wegovy — you’re also probably shedding muscle.
That’s particularly a concern for older adults, obesity medicine experts say. The more muscle someone over the age of 65 loses, the greater their risk of becoming frail or suffering a fracture or fall (which can be fatal in older adults). It is crucial for older adults to maintain muscle mass so that they can stay mobile and independent.
Muscle mass naturally dwindles with age. A 70-year-old, for example, will probably have less muscle and more fat than a 30-year-old with the same body mass index, said Dr. Scott Hagan, an assistant professor of medicine at the University of Washington who has studied obesity. When people lose large amounts of weight in a short time, such as while taking a drug like Ozempic, the loss of muscle mass can be drastic, with stark ramifications for health.
We currently know very little about how older adults in particular fare on these medications, said Dr. Janice Jin Hwang, chief of the division of endocrinology and metabolism at the University of North Carolina School of Medicine. Clinical trials on semaglutide, the active ingredient in Ozempic and Wegovy, have typically enrolled people in their 40s and 50s.
In clinical trials of semaglutide, people 65 and older were more likely to experience gastrointestinal side effects like nausea and vomiting than younger people. They were also more likely to stop taking the medications because of side effects in general.
Fatigue is a common side effect of these drugs, and can be even more pronounced in older adults. That can be the result of not eating enough while on the medications, but when people lose a large amount of weight, their blood pressure can also dip, Dr. Hagan said, which can make them feel dizzy and weary.
High blood pressure is common in older adults, but they are also susceptible to orthostatic hypotension, a sudden drop in blood pressure when standing up from sitting or lying down. The weight loss that comes with these medications can exacerbate that low blood pressure and make symptoms like feeling faint or lightheaded more pronounced.
Obesity rate for Latino adults in the United states in 2021 was 36.7%.
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