Vitamins & Supplements Archive

There are many ways one can try to avoid constipation. For example, lifestyle remedies may help—such as increasing dietary fiber, getting regular exercise, and drinking three to six cups of water per day. If those approaches don't work, doctors recommend using fiber supplements, such as psyllium husk (Metamucil), methylcellulose (Citrucel), or wheat dextrin (Benefiber). Another supplement that might help is magnesium. When all strategies fail, it may be time to try over-the-counter medication. One option is an osmotic laxative such as polyethylene glycol (Miralax).

Recently published research suggests that a daily multivitamin may improve memory enough such that it can function as if you were three years younger. We take a closer look at the study.

Online tools enable consumers to vet dietary supplements before taking them. That's important, since dietary supplements sometimes contain hidden prescription drugs, controlled substances, or untested and unstudied components. Some of the most reliable tools to vet supplements are provided on the websites of the FDA, National Institutes of Health, and Department of Defense. Consumers can look up basic information about dietary supplements, clinical evidence about their use and effectiveness, suspicious ingredients they may contain, and safety violations.

Some supplements can interfere with lab tests to diagnose or monitor health conditions, which can lead to life-threatening misdiagnoses or unnecessary additional testing. Biotin (vitamin B₇) can skew results from a blood test to diagnose heart attack. Other problematic supplements include vitamin C, which can interfere with blood sugar readings and stool tests; calcium, which can make bones appear denser than they are on bone density scans; and creatine, which can lead to falsely high readings of creatinine, a marker for kidney disease.

I'm 79 years old and have been taking 3,000 mg of vitamin C a day for years. I'm now uneasy about taking this amount and plan to cut back to 1,000 mg daily. Is this the right dose? Will my body be startled by the abrupt change?

A study published by JAMA Network Open found that people taking vitamin D supplements were less likely to have a cancer that spread from the original tumor site to another part of their body or one that proved fatal. However, this risk reduction was only seen in people who were at a normal weight, not those who were overweight or obese. The study did not find that people who took vitamin D were less likely to develop cancer over all compared with those who did not.

A 2022 study found that vitamin D deficiency significantly increases the likelihood of age-related loss of muscle strength, known as dynapenia, a major risk factor for falls.

When it comes to managing high blood pressure, the average American consumes too much sodium and too little potassium. Reversing this imbalance could help control high blood pressure which could, in turn, lead to fewer heart attacks, strokes, and deaths from heart disease.

In November 2022, the FDA called out seven supplement companies for illegally claiming their products could treat or prevent cardiovascular disease, such as atherosclerosis or heart failure.