A Denver television news station ran a story Wednesday about a woman with severe vitamin D deficiency — shedding light on the ultimate cause: overzealous sun avoidance.

“When I couldn’t get out of bed in the morning to go to my job. When I physically couldn’t get out of bed in the morning that’s when I knew something was wrong. Because I love my job,” Beth Rankin, a high school biology teacher, told Denver’s Fox affiliate KDVR. According to the report, “Beth says her joints were very painful. She felt mentally paralyzed and she didn’t know why.”

She was later diagnosed with severe vitamin D deficiency — ironic since she has been teaching biology students about vitamin D. “How could I have missed this?” she told the station. “I teach Vitamin D deficiency in my classrooms … and yet I didn’t know I had it.”

The station got their background on ‘The Sunshine Vitamin’ correct: “Vitamin D is a hormone that gets replenished when we sit in the sun. But sunscreen and people spending more time indoors has caused Vitamin D levels to drop,” they reported.

To read the story and see the video click here.