The spleen is responsible for the proper functioning of the digestive system, ensuring that the food we eat is transformed into Qi ~ the vital substance of life. Disharmony of the spleen will have symptoms such as fatigue, slow metabolism, water retention, loose stool, and feeling of heaviness.
The liver's job is to keep the flow of your body's Qi and blood (as well as your emotions) running smoothly. Our modern fast-paced lifestyle and chronic stress can negatively impact the liver's ability to function properly and smoothly, which, in turn can cause the spleen and the whole digestive system to function poorly and decrease your metabolism. Liver disharmony can also cause some of the "triggers" that lead to cravings and compulsive eating.
Fad diets such as a meal plan of cabbage soup or pineapples or rice or no-carbs may work but only for the short term. Instinctively, your body will crave foods and gorge, filling up and preparing for the next starvation, ie packing on fat for stored energy.
From a Western perspective, acupuncture has been shown to have an effect on the function of the nervous system, endocrine system, digestive system, food cravings, and metabolism. All of which can help to energize the body, maximize the absorption of nutrients, suppress the appetite, and reduce anxiety.