Lavana Thailam is a controversial remedy marketed in name of Ayurveda, which might have no effect in losing weight.
Uses:
It prevents superficial fatty accumulation and lack of body shape. 
It reduces lipid fraction of physique and removes unwanted water content thus maintaining figure of the body. 
This oil is prepared by Bio-organic method.
It Help In Reducing The Problem Of Obesity. 
It Will Help In Getting Your Proper Body Shape Back Without Any Strict Diet Rules And Exercises. 
It Removes Superficial Unwanted Water Content Of The Body And Prevents Accumulation Of Fatty Tissue Under The Skin.
 The side effects of lavana oil can include:
Allergic reaction with any of its ingredients
Redness
Skin irritation
Itching
Contraindications:
Do not apply lavana thaila on open wounds, inflamed skin and on the skin affected due to other diseases such as eczema
and psoriasis.
Claimed benefits:
The main benefits of lavana oil is in weight loss, as claimed and marketed by some companies. However, the use of oil might not have effect in fat reduction, but massage itself can help you losing weight.
Lavana oil is prepared using following ingredients:
Composition 
Rock salt  - 10 grams
Acorus Calamus - 2 grams
Curcuma longa - 2 grams
Dolichos biflorus - 2 grams
Ficus microcarpa  - 2 grams
Ficus racemosa   - 2 grams
Ficus religiosa  - 2 grams
Ficus bengalensis - 2 grams
Setaria italica   -  2 grams
Trachyspermum roxburghianum - 2 grams
Zingiber officinale -  2 grams