AIO over this or did she know what she was saying?

Today, my coworkers & I were chatting about our mental health.

I spoke about my bipolar ii disorder, but not my body image issues (I’m very thin and I’m insecure about it)

I stated that when I’m not on my meds, I’m a huge mess and tend to lose a lot of weight. In a sarcastic tone (to me), my coworker says “you really don’t have all that much to lose”.

I feel like at our age (late 20s) it’s beyond obvious how unnecessary it is to make those types of comments about anyone’s body. Me and my coworker haven’t established a close enough work relationship for me to find the humor in her remark, and overall I don’t even make those types of comments towards even my closest friends.