The negative impact or the report of zero results of many foods and supplements has been reported throughout the years. Sometimes the list changes because someone has come up with a new gimmick or a new product that cures everything. My top 10 blacklisted foods and supplements changes depending upon the research that is most recent.

1. Processed meat is the first. Every report I have read says that we need to eliminate or at the very least reduce the amount of processed meats we eat such as cold cuts. One study found that patients who ate the most processed meats were at a much greater risk of recurrence for benign colorectal tumors. An older study and still regarded highly says that people who ate the most processed meat were 50 percent more likely to develop lower colon cancer. The other problem is processed meat is high in salt content and that is not good for blood pressure.

2. Fried fish is the second food to avoid. Granted, fish is good for you but do not fry it for fish sticks, fish sandwiches and fish and chips. A study of ultrasound images of 5,000 older adults found that those who ate fried fish showed greater evidence of arteriosclerosis and other heart problems.

3. Avoid trans fats. You can hardly turn on the TV or read an online health blurb without someone telling you to give up trans fat. An increase of just 2 percent.In caloric intake of trans fat was associated with a 23 percent higher risk of coronary heart disease. On a per-calorie basis, trans fat increased the risk of heart disease more than any other micronutrient.

4. Skip the power bars. Unless you are an athlete running marathons, most power bars and so called energy bars are glorified candy bars. They are packed with calories that you do not need.

5. As long as I am on the topic, then also skip the energy drinks. There is nothing nutritious about them. They are loaded with caffeine and extra sugar. Unless you are participating in some athletic activity that lasts longer than 2 hours, plain, ordinary water is your best source of hydration.

6 .Do not purchase 714X. You have probably seen the commercials for this product on TV. It is supposed to be a cancer treatment. Also called trimethylbicyclonitramineoheptane chloride, the inventor claims it cures multiple sclerosis, fibromyalgia and other diseases. The American Cancer Society, our official research centers, or any other research facility have not found any evidence to substantiate those claims.

7. Policosanol does not work. This supplement is used to treat cholesterol. It is derived from sugar cane and is found in popular multivitamins but it not effective in lowering your LDL or the bad cholesterol.

8. Herbal weightloss products can be harmful. These products are seldom scientifically tested to prove they are safe or that they work. Ephedra, for example, is now banned from the market. Just because a product says it is ephedra free does not mean the product is danger free.

9. Saw palmetto extract does little to help an enlarged prostate. Men take saw palmetto as a treatment for enlarged prostate or a common condition known as prostatic hyperplasia (BPH). A relatively new federally funded clinical trial found no difference in benefits between saw palmetto extract and a placebo.

10. Glucosamine and chondroitin promise more than they give. Unless you are in severe pain from arthritis keep your money. In a random, double blind study, the supplements were found to be no more effective than a placebo against arthritis pain. Only a small subgroup, maybe the 20 percent with the worst pain, saw any meaningful benefit.