Yoga is for the physical, mental and spiritual so when you do Yoga you practice the 3 aspects, which can help you lose weight. Transforming your body and mind is the first thing that the Yoga can do for you. Anyway Yoga was originated in India but some said that Yoga was first found around 500 B.C. The same time of Gautama, the Buddha, Gautama is the founder of Buddhism.
There are paths that can connect to the origin of Yoga; there is Sanskrit, civilization and etc., etc. I guess if you would like to know the beyond infinity of the Yoga, you might want to write a book about yoga but if you are only hearing what’s Yoga can do for you:
The Benefits of Yoga:
It can manage stress
If you are in deeper practice it can eliminate toxins in your body.
It can help you with muscle strength and tone
It can increase endurance
Abdominals will be refined
So why don’t you try yoga now for exercise. It will not be easy in the beginning but I am sure you will enjoy it especially when you already see the result.