[Jemian]

In this study, the possible anti-diabetic effects of Agakong3, in db/db mice have been evaluated.

How about

"In this study, Agakong3 will be revealed to slow or even reverse the effects of diabetes melitus 2 in laboratory mice"?

A thesis statement needs to establish what you are going to prove, however your sentence which I quoted above, merely tells what is being evaluated. It needs to also have the expected outcome of the evaluation.

[SumProVita]

“A thesis statement needs to establish what you are going to prove, however your sentence which I quoted above, merely tells what is being evaluated. It needs to also have the expected outcome of the evaluation.”

Excellent! (It’s also nice to see someone else who gives the newbie the benefit of the doubt.) ;=)