Is there a better/quicker way of checking these levels rather than going in for a bloodwork panel? I feel like my natural Vitamin D intake can change really dra

Is there a better/quicker way of checking these levels rather than going in for a bloodwork panel? I feel like my natural Vitamin D intake can change really dramatically based on the season. I worry that maybe I'm overdoing it in the warmer months. I typically go in once a year for a physical and that's the only time I ever see these levels.