Are medical issues and looking terrible inherited?

Though I'm 22 at this moment, I feel like I'm next in the future. An aunt already died of medical complications not so long ago and she was just 68. Other family members have high cholesterol, heart problems, colon cancer, etc. In addition several are aging poorly.

Or can I stop that from happening to me by avoiding meat (I rarely eat steak... also avoid pizza) and instead I eat fish, veggies, vegetarian foods, salad, nuts, fruits and milk with cereal. I'm frequently jogging too.

Also, I've been using creams since my 15th b-day.
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I hope that works out. So far my cholesterol levels from a recent check up was 130 and no medical issues as of now. I hope not.
Are medical issues and looking terrible inherited?
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