What causes a slightly low chloride serum level? my level was 97. c02 was 29 which was slightly elevated.

Slightly low CL?: Most likely a variation within ur normal range. It is best to ignore slightly low or high tests when many are done. Eating, supine or standing, time of day, when u last drank water or took meds or how fast u were breathing or how the blood was drawn/ processed, squeezing hand before blood draw, breAthing too fast or too slow on purpose or from anxiety may change many blood tests. Recommend repeat