A systematic review examined whether vitamin supplements had any effect on the course and outcomes of Alzheimer’s disease and dementia.
One of the undying beliefs of some people is that a handful of expensive supplements prevent cancer and heart disease. Outside of a few cases where there is a diagnosed medical need for supplements, the only result of taking them is very expensive urine.
I’ve written a lot about various supplements and their potential to treat or prevent cancer and heart disease, and the evidence is sorely lacking. There are good ways to prevent cancer, like not smoking and getting the HPV vaccine, but not a single one of them includes swallowing a bunch of vitamins.
Recently, the US Preventive Services Task Force (USPSTF) issued draft recommendations on supplements – they were unable to give a single recommendation to any of the supplements that they examined. And as we do here, let’s take a look at what they wrote.Read More »Do supplements prevent cancer or heart disease? No evidence
Food fads are plain annoying, but I just tend to ignore them, unless I’m feeling in a mood. Yesterday, I had purchased my favorite drink at the Big Coffee drive through, which is just a large bold coffee, black. Well, something got mixed up and I ended up with a latte, which I generally don’t mind. Except this latte was made of a foul tasting substance, almond milk. Really?
Food fad believers often intersect with anti-science activists in other areas, like vaccines, GMOs and quack cancer cures. Sure, there may be a subset of individuals who think that almond milk tastes great – which would lead me to question the quality of their taste buds – but they aren’t the majority. Most people just believe that almond milk is healthier.
Well, does almond milk have any health benefits beyond regular every day milk? And is there some unintended consequences to buying almond milk?
Let’s look at almond milk. No taste tests are required.
Vitamin and mineral supplements are important to maintaining proper levels of these nutrients when they aren’t obtained from the diet. Generally, if a human consumes a diet of broad based foods, there is little need for supplementation, unless they are afflicted with a chronic medical disorder which requires additional nutrients.
Vitamins and minerals do not have an impact on the immune system. Numerous articles have been published in peer-reviewed journals that have found very little evidence that supplements can lower risk of heart disease or one of the over 200 forms of cancer. What we need next, in the hierarchy of scientific evidence, is a systematic review published in an important journal.
Over the past few years, some research has suggested that there might be a correlation between high soy consumption and lowered prostate cancer risk. Most of the research suggesting the link was observational or based on animal studies on the role of soy supplements on the risk of prostate cancer, or on the risk of recurrence of the cancer after treatment.
According to the American Cancer Society, there is some logic to a potential causal relationship between soy consumption and risk of prostate cancer:
Plant estrogens (phytoestrogens) were first identified in the early 1930s. At that time it was discovered that soybeans, willows, dates, and pomegranates contained compounds that were much like estrogens. Scientists began studying the role isoflavones play in reducing breast cancer risk in the 1960s. In a 1981 prospective study in Japan, researchers found that daily intake of miso, a soybean paste, was linked to lower death rates from stomach cancer in more than 260,000 men and women. Around that time, other studies on soy began to be published in the United States. In October 1999, the U.S. Food and Drug Administration (FDA) agreed to allow health claims about soy’s role in reducing heart disease on food products containing soy protein.Read More »Soy supplements and prostate cancer–no effect
Potential causes for cancer are numerous. Infections. Radon gas. Cigarette smoking. Sun exposure. Obesity. With over 200 types of cancer, each with a different pathophysiology, there may be an equal (and probably greater) number of causes. Although many causes can be easily eliminated, such as stopping smoking, testing your house for radon, getting an HPV vaccine to prevent human papillomavirus infections, and wearing sunblock to reduce the risk of melanomas, the sheer complexity and number of types of cancer means that there is probably not going to be any simple panacea to preventing (or even curing) cancer. In fact, some hereditary cancers, such as those individuals who carry genes that are implicated in breast and ovarian cancers, may not be preventable at all.
Other than eliminating direct risks, are there things that can be done to actually prevent “cancer”? Once again, with over 200 types of cancer, this may be an impossibility, but the two most popular cancer prevention ideas are supplements and nutrition. Vitamins and other supplements are a $61 billion industry in the US. They generate these sales with minimal regulation, minimal quality control over the quality and dosage, and no requirement to actually provide evidence that the supplements do what is claimed by the supplement industry, aka Big Herbal. The FDA only gets involved with the industry if there’s some dangerous side effect, or when the claims of the industry are so outrageous that the FDA has no choice but to get involved.Read More »Folic acid supplements and cancer–myth vs. science
I’ve never been a fan of vitamin supplements. Aside from a very few supplements intended for a few specific clinical conditions, like vitamin C and scurvy, they have little use in preventing or treating diseases. In fact, because mammalian physiology has evolved a homeostasis for these chemicals, any excess amount that can’t be stored in the fat or other tissue is cleared by the kidneys and becomes part of your urine. I’m willing to venture that the urine of many Americans is quite expensive, with all of the cleared vitamins and other micronutrients. A balanced diet over several weeks is sufficient to provide the body with all of the nutrients and vitamins to be healthy and strong. You are not even required to have all vitamins and nutrients every day, as storage of a few nutrients will be released as necessary, and clinical manifestations of nutrient deficiency may take weeks or months.
Potential causes for cancer are numerous. Infections. Radon gas. Cigarette smoking. Sun exposure. Obesity. With over 200 types of cancer, each with a different pathophysiology, there may be an equal (and probably greater) number of causes. Although many causes can be easily eliminated, such as stopping smoking, testing your house for radon, getting an HPV vaccine to prevent human papillomavirus infections, and wearing sunblock to reduce the risk of melanomas, the sheer complexity and number of types of cancer means that there is probably not going to be any simple panacea to preventing (or even curing) cancer. In fact, some hereditary cancers, such as those individuals who carry genes that are implicated in breast and ovarian cancers, may not be preventable at all.Read More »Cancer prevention–supplements