• A build-up of cellular waste in remaining tissue, because of the extreme toxicity of chemotherapy drugs. These powerful drugs kill healthy cells right along with the cancerous ones, leaving a residue that needs to be removed from the body.
• The depletion of many important nutrient levels because of chemo. This often causes digestive problems because the drugs destroy much of the good flora in the gastrointestinal tract, in addition to the lining of the tract itself.
• "Chemo brain," a catch-all term for the common memory glitches, lack of focus, mild cognitive impairment and fatigue that follow cancer treatment.
• Peripheral neuropathy, which causes tingling, burning and numbness in the feet and, sometimes, hands.

Dr. Stengler’s prescription for overcoming cancer treatment is:

• To create a healthier cellular environment, try eliminating the damage done by treatment and rebuild your digestive health. Key dietary recommendations are:
• Fermented foods. Eat lots of miso, sauerkraut (the kind you buy at the health food store, not the deli), kefir and yogurt.
• Water. Drink 60 to 70 ounces daily to flush toxins from your system. (Note: Limit water with meals to eight ounces as more can dilute the effectiveness of stomach acid.)
• Fruits and vegetables. Enjoy these every day. If possible, buy organic, especially when it comes to soft fruits such as peaches, nectarines, strawberries and pears.
• Avoid processed foods -- including sugar and white flour. This will eliminate refined sugars and unhealthy fats (trans fats, partially hydrogenated or hydrogenated fats and interesterified fats), all of which can be harmful to your health.
• Eat plenty of healthy fats. These are omega-3s, (found in flaxseed, walnuts and fatty fish, including salmon, herring and sardines), balanced by some omega-6s (in corn and soybeans).
• Avoid tuna, king mackerel, shark, swordfish and other fish with potentially high levels of mercury. You don’t need to add yet more toxins to your system.

2. Strengthen health overall and detoxify the liver 

• Antioxidants. These help rebuild health, potentially improve chemo outcomes and heal tissue damaged by radiation treatment. Among the supplements that Dr. Stengler prescribes: CoQ10; vitamin C; vitamin E mixed with tocopherol/tocotrienols and a carotenoid complex; vitamin D; lycopene; and selenium.
• Probiotics. These can help balance the digestive system. Dr. Stengler typically prescribes one with a blend of Lactobacillus acidophilus and Bifidobacterium bifidum.
• Green C hlorella. These deliver phytochemicals, which can be helpful to a system damaged by chemotherapy. He likes a brand called Sun Chlorella.
• Wheatgrass. It contains helpful vitamin K and chlorophyll antioxidants.
• Milk thistle. This herb helps support the liver and kidneys by protecting cells against damage caused by breakdown products of the cellular debris and chemo drugs.
• NAC. N-acetylcysteine, derived from a protein amino acid derivative L-cysteine, aids in the breakdown of drug and cellular wastes. 

3. Reduce Systemic Inflammation

• Depression
• Fatigue
• Fertility
• Financial
• Hair loss
• Insomnia
• Intimacy
• Joint Pain
• Lymphedema
• Memory Loss
• Menopause
• Neuropathy
• Osteoporosis

The Natural Physician’s Healing Therapies, by Mark Stengler, M.D.

Life Over Cancer: The Block Center Program for Integrative Cancer Treatment, Andrew Weil, MD

Mayo Clinic - Overcoming worry after breast cancer treatment

Breastcancer.org - Overcoming fears of breast cancer treatment