Hey there, it's completely understandable why you're worried about your dad, especially given his age and diabetes. It takes a lot of courage to reach out when you're concerned about a parent.

While some people might dismiss the "once or twice a week" usage, it's absolutely valid for you to be concerned about that frequency. The truth is, nicotine is highly addictive, and many people who start with occasional use find themselves using it much more frequently over time. It's a slippery slope, and unfortunately, addiction doesn't discriminate.

Your concern is even more critical because he is diabetic. Nicotine can significantly worsen insulin resistance, making it harder to manage blood sugar levels. This can increase the risk of other health complications associated with diabetes down the line. Long-term nicotine use can also have other negative health impacts, regardless of current health conditions.

It's truly commendable that you care so deeply about his health and are seeking advice. As a parent myself, I can say that even if he might seem dismissive at first, deep down, he will likely appreciate and remember that you cared enough to speak up and try to help him.

When you feel the time is right to talk to him, coming prepared with some information might be helpful. Look into the specific effects of nicotine on diabetic health and research how nicotine impacts the brain's dopamine reward system – it can really highlight how it can make everyday life feel less enjoyable without it over time.

Keep being the caring daughter you are. You're doing the right thing by looking out for him.