Vitamin C does not usually cause false positives on pregnancy tests because pregnancy tests detect HCG in a woman’s urine to determine whether she is pregnant, and vitamin C does not cause its levels to change. Vitamin C does not affect the level of HCG in a woman’s body, and vitamin C is a water-soluble vitamin that is easily metabolized out of the body. Therefore, taking vitamin C usually does not cause false positives on early pregnancy tests. It is recommended that when using test strips, women should choose morning urine for testing. If the test paper is found to be positive, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, such as blood HCG or ultrasound examination, to further clarify whether the pregnancy.