Nutrition for Strength When You're Not Well (cont.)

If you have cancer, are not hungry, and don't eat, "you could become weakened to the point that treatment can be halted," she says. To avoid this scenario, "psychologically think of food as medicine."

When you feel too ill to eat, consider a high-calorie drink, Beller suggests. "Take some easily-digestible protein powder (such as whey) and put it in a blender with some almond milk (which is also easy to digest) and some frozen berries, so it has a cool temperature, but it's not icy," she says.

"Sliced bananas or yogurt can be added to make it creamy," she says. "Blend and drink." It's high-protein (containing roughly 21 grams of protein, which is the equivalent to 3 ounces of chicken), contains one to two servings of fruit, and is rich in calcium, Beller says.

Another good choice: "Healthy, high-protein foods such as nuts are usually well tolerated when you are nauseous," she says. Almond butter, cashew butter on crackers, or pre-prepared soup with beans also pack a good protein punch.

Sally Pataky, MS, RD, recommends eggs, as well as shakes, to her clients at the City of Hope Cancer Center in Duarte, Calif. "It takes a lot of energy to chew things," she says. "I suggest eggs because they are the best quality protein and they are easy to eat."

Concentrating on Calcium

Calcium is an essential mineral that all women need from adolescence on, says clinical nutrition specialist Frederic Vagnini, MD, FACS, medical director of Pulse Anti-Aging Center in Scarsdale, N.Y. "It's an absolute must and a no-brainier."

For optimal bone health -- especially among people taking medications such as corticosteroids that deplete bone density -- aim for 1,200 mg of calcium a day from both food and supplements.

"Yogurt is rich in calcium and easy to get down," he says.

Taking a Daily Multivitamin

Most nutritionists, including Beller, suggest that people try to get their vitamins from whole foods. Food contains many vitamins and minerals, and their synergistic effect is probably more beneficial than vitamin supplements. Still, no one has a perfect diet. So Beller and Vagnini suggest one multivitamin each day.

"I recommend everyone take a multivitamin, especially those who are elderly or who have a chronic illness," says Vagnini. He says "poor appetite is not an uncommon problem in the elderly and it is also worsened by poor teeth, fatigue, and a decrease in mental acuity."

Finding Time for Fiber

Most people need 21-38 grams of fiber a day, depending on your gender and age, according to the American Dietetic Association. In addition to improving regularity, adequate fiber can help prevent several forms of cancer and heart disease.

"Generally speaking, fiber comes from fruits, vegetables, and whole grains," Vagnini says. But if your appetite is compromised, "one of the things that you may try is a fiber supplement or try oat bran cereal mixed with some milk and fruit."

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