Diabetes is more common in Japan because Japanese people's bodies don't produce as much insulin as other people.
Japanese people are more likely to become diabetic because their bodies don't secrete as much insulin as people from other countries.
1) Diabetes is more common in Japan because Japanese people's bodies don't produce as much insulin as other people.
「日本人の体は他の人と比べインスリンの分泌が少ないので、糖尿病は日本で多く見られる。」
2) Japanese people are more likely to become diabetic because their bodies don't secrete as much insulin as people from other countries.
「日本人の体は他の国の人と比べてインスリンの分泌が少ないので、糖尿病になりやすい。」
「糖尿病」は diabete
diabetic で「糖尿病の」という形容詞になります。
「インスリン」は insulin
「分泌する」は secrete や produce を使っています。
ご参考になれば幸いです！
日本 
