Translation of "Supplement" in Japanese

Farmers often moonlight to supplement their incomes.

農民はしばしば収入を補うために副業をします。

You had better supplement your diet with vitamins.

あなたの食事にはビタミンを補うほうがよい。

But they have a grizzly way to supplement their diet. They're carnivores.

‎そのため獲物を捕って ‎養分を得る ‎つまり肉食だ