Type 2 Weak nails

I’m wondering whether my T2 diabetes causes my brittle, flaky nails. Does anyone know?
I’ve had this problem for years now, and have tried just about everything to solve it. I should have bought shares in Sally Hansen and Boots because if it’s on the market, I’ve tried it. And nothing works. I stopped using the paint on strengtheners because they didn’t do the job, and I thought massaging in oil, cream etc etc would be more effective. I’m not aiming for talons- just tidy non scrubby hands would be fine. They look so tatty.

Chook said:

Could it be that you aren't getting enough calcium in your diet?

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I’ve taken extra calcium supplements, also Vit D, because my levels are low even with sun.
I just wondered whether it might be down to the diabetes because I can’t find any other reason.