Hello kamra_p ji. I found a mantra for obesity.
After meals if a person chants the following mantra, it kindles the
> digestive fire which will help in proper and wholesome assimilation of
> the food consumed. Hence, this can be an effective mantra to control
> obesity.
>
> "Om Agasthyam kumbarnam cha shanim vrugodharam vatavaanalam
> Bhojanam pachanaarthaaya smaredhabhyaam cha panchakam."
>
> Chant this mantra for 3 times and gently stroke your stomach after
> your meals.
>
> You can sit in the vajraasana position after meals for about 2 to 3
> mins. to improve your digestion.
>
> Honey taken in with lemon and luke-warm water early in the morning is
> another technique to control obesity.
>
> Sarvaangaasanaa is a powerful aasanaa to control obesity if that is
> triggered by thyroid problems. Even otherwise, this yogic posture
> tones up all the internal organs of the body.
>
> Chakraasana, salabaasana, Dhanuraasana,Mayuraasanaa, etc. also reduce
> abdominal fat and tone up the digestive organs.