The lungs is your answer :)
The answer is, “Complementary medicine is treatments that are used along with standard medical treatments but are not considered to be standard treatments. One example is using acupuncture to help lessen some side effects of cancer treatment. Alternative medicine is treatments that are used instead of standard medical treatments.”
In women of childbearing age, folic acid supplementation has a demonstrable and meaningful benefit, reducing the incidence of NTDs. Its use in this population is evidence-based and demonstrably effective
It tends to decrease in older adults