Would it be rude if I talked to my friend about her weight gain?

Now I’m not the type to talk about someone being fat cause I’ve been fat myself and I believe you should love your body. However, my friend has always been on the larger side but in that past couple of years her weight has significantly increased and now it’s affecting her health ! I’ve always tried to get her to come work out at the gym with me and she’s gone a couple of times… but that’s like 4 times in the past 4 years. she now has hypertension, heart problems, and asthma from her weight gain. She’s over 300 lbs and I’m starting to get concerned. She’s only 24 and to have all these health problems so soon makes me scared for her. She has told me that her doctor and her family told her she needs to lose weight and it hurts her feelings. She gets really defensive and claims she only eats 1-2 meals a day so she’s not unhealthy so I don’t say anything… but it’s really concerning now. She just got diagnosed recently and that’s why I really want to say something now

Would it be rude if I talked to my friend about her weight gain?
Would it be rude if I talked to my friend about her weight gain?
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