Some thoughts
Pursuant to the DSHEA, the Food and Drug Administration regulates dietary supplements as foods, and not as drugs. The FDA does not approve dietary supplements based on their safety and efficacy; the FDA can take action only after a dietary supplement has been proven harmful. However, certain foods (such as infant formula and medical foods) are deemed special nutritionals because they are consumed by highly vulnerable populations and are thus regulated more strictly than the majority of dietary supplements. The FDA claims that their rationale for a lack of regulation is a "freedom to choose" by the consumer, but there are economic benefits as well. The FDA chooses not to regulate dietary supplements because clinical trials are lengthy and costly. They tend to believe that the supplement is beneficial until problems arise. Even when the evidence is obtained, translating it to practical dietary advice can be difficult and counter-intuitive. Lutein, for example, occurs in many yellow and orange fruits and vegetables and protects the eyes against various diseases. However, it does not protect the eye nearly as well as zeaxanthin, and the presence of lutein in the retina will prevent zeaxanthin uptake. Additionally, evidence has shown that the lutein present in egg yolk is more readily absorbed than the lutein from vegetable sources, possibly because of fat solubility. At the most basic level, the question "should you eat eggs'" is complex to the point of dismay, including misperceptions about the health effects of cholesterol in egg yolk, and its saturated fat content.
I found these related resources
- my healthy day
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