someone once posted this
A thiamine deficiency is often the cause of a loss of appetite. Drink peppermint tea to help increase the appetite.
Take the herb fennel in capsules to normalize the appetite.
Any combination of the following will increase the appetite: barberry, garlic, ginseng, goldenseal, hops, horse radish, oatstraw, parsley, and safflower.
but personally, i've been working with guys wanting to gain weight for years. what we do is slowly add more food and more meals over days and weeks. after some time, their bodys do get accustomed to more food. after even more time, its like their stomachs know its time to eat before they realize it.