In Ayurveda, you can improve your digestion, absorption, and assimilation by eating a diet that balances the doshas (Vata, Pitta, Kapha) and the gunas (hot, cold, etc). Here are some general guidelines:

• Rebuilding fluids is essential for good digestion. A simple glass of warm water 1/2hr before meals can improve digestion by 25%. Licorice root and other anti-diuretics can help retain electrolytes. Foods that rebuild fluids may be helpful - such as grapes.
• Short term use of Vitamin, mineral, and electrolyte supplements may be required while troubleshooting the cause of your malabsorption. Balanced blood chemistry improves overall body function and may improve absorption as well.
• Eat easy to digest, nutritive foods like rice, oatmeal, ghee, & sweet potatoes. Easy to digest foods can nourish your body with minimal effort. Eat at regular meal times. Relax during and after meals. Vata pacifying kitchari is nourishing but also cleanses the intestines. A light, yet nourishing diet can restimulate appetite. Belly breathing can help rebuild digestive strength.
• Spicy digestives and circulatory stimulants can warm up a cold digestive tract. Examples include black pepper, ginger, and hing. These should not be used in the presence of inflammation and irritation. In that case, fennel, cardamom, turmeric, and fresh ginger are preferred. Spices generally improve carbohydrate digestion and can break up thick mucus in the gi tract.
• Astringent herbs and spices can help bind stool in case of chronic diarrhea, giving your body more time to absorb nutrients. Examples include nutmeg and fresh, home-made buttermilk.
• Soothing anti-inflammatories like pomegranate, or herbs like shatavari can reduce inflammation. Amalaki is Ayurveda's herb of choice for restoring the lining of the digestive tract.
• Cholagogues, including foods with sour or bitter taste, can improve fat digestion by increasing bile production and release. Examples include lemon, kale, and herbs like bhumyamalaki. Use caution, bitter and sour taste can also increase bowel motility.
• Antimicrobials and anthelminthics can kill parasites and worms, as well as reduce bacterial overgrowth in the intestine. Examples include cloves, turmeric, goldenseal, neem, and kutki.