To new parents, it often feels like they are feeding their infant all the time, and this can be stressful and worrisome.
Maybe it was the unknown that was so worrisome.
Although the threat of Sudden Infant Death Syndrome is always worrisome for parents, the statistics have plummeted significantly since the early eighties.
However, adults can better handle a vitamin D deficiency than children, so their symptoms of osteomalacia may not seem as worrisome, acute or pressing.
Another worrisome aspect of using offshore SEO is the difference in laws - many overseas companies have different standards of copyright and licensing laws, which can come back and reflect badly on your firm.