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.
Some people who regularly feel light-headed after eating tend to write it off as a normal occurrence and ignore the symptom completely. However, people suffering from this condition should beware as getting dizzy after eating may be the only early symptom of an actual underlying condition.hellfish contain some toxins that can also cause damage. Food with excessive amounts of salt or food that hasnât been cooked properly can also make you dizzy after eating. Some people also feel light-headed after eating canned foods, pickled vegetables and foods with lots of baking powder.