This is the type of vitamin D that circulates in the blood. Itâs considered a good reflection of how much vitamin D youâve absorbed from sun exposure and taken in from foods. Levels of vitamin D are expressed in nanomoles/liter (nmol/L) or nanograms/milliliter (ng/mL). According to the Office of Dietary Supplements (ODS), the results can indicate the following:
Other Health Conditions. On rare occasions, being tired after a meal or simply sleepy all the time could be a sign of another health problem. Diabetes, anemia, underactive thyroid, celiac disease, food intolerance, and sleep apnea can make post-meal drowsiness worse.
Eating and Nausea. The number of potential reasons for nausea after eating can make it difficult to determine the cause. Nothing can spoil a good meal like a bout of nausea after eating it. The nausea can be caused by many things, from illness to your bodyâs natural reaction to changing hormones. Although many times the nausea will pass, you should visit your doctor if you consistently suffer from nausea after eating, or if it is accompanied by severe pain, fever or other symptoms.