The Ninja Turtles in real life would be OBESE, have osteoporosis, rickets, and suffer from depression due to a vitamin D deficiency. The Ninja Turtles were created as a joke comic, then they were turned into a beloved cartoon and movie franchise with unlimited toys. I myself spent hours holding a Raphael or Michelangelo action figure with steroid size muscles and wondered how I would get strong like them someday. They ate a lot of pizza and junk food and stayed in the dark. Almost all creatures need sun especially reptiles to increase the conversion of vitamin D. Vitamin D is a prehormone and was mislabeled a vitamin but never was renamed.
Getting adequate sunlight each day or taking a vitamin D supplement is imperative in our current mostly indoor style of living. According to hormones.org, “Studies show that people who have low vitamin D levels are more likely to be obese. Researchers have found that vitamin D helps regulate adrenaline, noradrenaline (also called norepinephrine), and dopamine production in the brain; as well as helping to protect from serotonin depletion. For this reason, low vitamin D levels increase an individual’s risk of depression significantly. A better understanding of vitamin D function is necessary to fully comprehend how it is linked to so many health concerns.”
Just because you might tell your dog to quit licking themselves here is this tidbit. “Cats and dogs naturally acquire vitamin D nutrient from UVB sunlight. Unlike humans and reptiles, cats and dogs do not make vitamin D in their skin. When UVB rays strike an animal’s fur, oils in the fur are activated to produce vitamin D. Cats and dogs consume vitamin D when they lick or groom their coats”
I take this brand for vitamin D3 and recommend that people take 5000 to 10,000iu a day during the winter and when they are not going outside regularly.