Jennie

燕窩=  養癌 .
One of my friends went to a Chinese herbal shop to buy  燕窩 after her surgery for cancer. The owner has known her for a long time and he told her frankly that she should not eat any 燕窩. He said he didn't want her to suffer from cancer again.
BTW, do you think it's humane and merciful to destroy some other creature's home which it has built painstakingly with its saliva?  And in the case of  血 燕 , the bird has to build its nest again hurriedly until it vomits blood.
If you can tolerate and forgive an invader break up your home and make you homeless, then go for 燕窩.