Based on blood samples and X-rays of 365 babies and toddlers, researchers at Children's Hospital Boston say 12 percent were deficient in Vitamin D. And 40 percent were below the optimal levels for their age group.

Those who drank less milk were at a higher risk for being deficient.

Researchers involved in this study say children and breastfed babies may need Vitamin D supplementation. But others say it's too soon to make that recommendation until more research can be done.

And in other medical news…
Scientists in Spain are busy trying to figure out why the Mediterranean diet is so healthy.

And if Spain gets its way, the Mediterranean diet could join the united nation's cultural heritage list, putting it alongside the festival of the dead in Mexico and the royal ballet of Cambodia.

The move could also provide another way of marketing Spanish products such as olive oil, ham and wine.

The Spanish government is leading the bid -- joined by Italy, Greece and Morocco.

The Mediterranean diet relies heavily on fresh fish and produce, legumes, Iberian ham, olive oil and wine.