4. You feel particularly weak.
Do you feel like you are weaker than usual? Do you find it hard to perform even the simplest of tasks, like lifting your head up from a pillow? If so, it could be because your vitamin D levels are low.
Several research studies have revealed that vitamin D plays an important part in controlling the muscles of the body. As such, if you are deficient in this vitamin, you might start to feel noticeably weak.
Something as simple as walking up a flight of stairs or even walking from your front door to your car could feel taxing. If you find that you are feeling noticeable and increased weakness, make sure you have your vitamin D levels checked. Taking a supplement or increasing the amount of vitamin D-rich foods you eat could be extremely beneficial for you, as they can help you feel stronger.