Fruit juices are effective against gastritis. Spinach and carrot juice, twice a day helps. Pumpkin juice for a month or two is helpful, when taken in an empty stomach. Foods that cause gas, such as broccoli, cabbage, peas, onion, dried beans and so on are harmful to the stomach.
Sodium hydroxide is a powerful chemical with many aliases: NaOH, lye and caustic soda. Sodium hydroxide is often the active agent in cleaning solutions, but it is also used in the manufacturing of products like textiles, cellophane and paper. This chemical can be very dangerous and can severely damage materials.
Divide the amount of lye by 0.3 and then subtract the amount of lye from the result. For example, to make just over 2 pounds of olive oil soap, measure 32 ounces of olive oil and 4.33 ounces of lye because 32 ounces of olive oil  0.1353, which is the saponification value for olive oil, = 4.33 ounces of lye.