Yes. It is gradual, and protects against cancer and liver trouble. If your system is too weak for liver flushes, it helps you.
Lay a few layers of flannel soaked in warm castor oil (wring it out) directly on your belly, under ribs area. Then lay plastic over that, and a hot water bottle over that. Get a towl to wrap around your body to prevent oil leaks. Lay quietly for one hour.
Do this daily for 30 days, and you should feel much better.
Read about it here.