Vitamin c and Haemoglobin abnormal - a phase IV clinical study of FDA data

Summary:

Haemoglobin abnormal is reported as a side effect among people who take Vitamin c (l-ascorbic acid), especially for people who are female, 60+ old, also take Vitamin D3, and have Rheumatoid arthritis.

The phase IV clinical study analyzes which people have Haemoglobin abnormal when taking Vitamin c. It is created by eHealthMe based on reports of 89,802 people who have side effects when taking Vitamin c from the FDA, and is updated regularly.

What is Vitamin c?

Vitamin c has active ingredients of l-ascorbic acid. It is often used in immune response. eHealthMe is studying from 92,472 Vitamin c users. Check the latest studies of Vitamin c.

What is Haemoglobin abnormal?

Haemoglobin abnormal is found to be associated with 617 drugs and 1,008 conditions by eHealthMe. Check the latest studies of Haemoglobin abnormal.

On Aug, 03, 2026

89,802 people reported to have side effects when taking Vitamin c.
Among them, 78 people (0.09%) have Haemoglobin abnormal.

Could Vitamin c cause Haemoglobin abnormal?

Among these 78 people:

What is the gender of people who have Haemoglobin abnormal when taking Vitamin c? *

female: 79.66 %
male: 20.34 %

What is the age of people who have Haemoglobin abnormal when taking Vitamin c? *

What are other drugs people take besides Vitamin c? *

What are other side effects people have besides Haemoglobin abnormal? *

Fatigue (feeling of tiredness): 28 people, 35.90%
Diarrhea: 18 people, 23.08%
Thrombocytopenia (decrease of platelets in blood): 17 people, 21.79%
Nausea (feeling of having an urge to vomit): 16 people, 20.51%
Abdominal Pain Upper: 16 people, 20.51%
Haematocrit Abnormal: 14 people, 17.95%
Weakness: 14 people, 17.95%
Red Blood Cell Count Abnormal: 13 people, 16.67%
Full Blood Count Decreased: 12 people, 15.38%
Dizziness: 11 people, 14.10%

What are the existing conditions these people have? *

Polycythaemia Vera (blood disorder in which the bone marrow makes too many red blood cells): 10 people, 12.82%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 10 people, 12.82%
Primary Myelofibrosis (primary disorder of the bone marrow): 9 people, 11.54%
Crohn's Disease (a condition that causes inflammation of the gastrointestinal tract): 6 people, 7.69%
Primary Pulmonary Hypertension (primary high blood pressure that affects the arteries in the lungs and the right side of your heart): 5 people, 6.41%
High Blood Cholesterol: 5 people, 6.41%
Menopause (end of monthly cycles in women): 4 people, 5.13%
Intervertebral Disc Disorder (spinal disc disorder): 4 people, 5.13%
Ovarian Cancer (cancer of ovary): 4 people, 5.13%
Paroxysmal Nocturnal Haemoglobinuria (haemoglobin in the urine): 4 people, 5.13%

* Approximation only. Some reports may have incomplete information.

Do you take Vitamin c and have Haemoglobin abnormal?

- Check whether Haemoglobin abnormal is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously

Related studies:

Effectiveness of, long term effects of, and alternative drugs to Vitamin c:

Vitamin c (92,472 reports)

Browse all side effects of Vitamin c:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all the drugs that are associated with Haemoglobin abnormal:

Haemoglobin abnormal (617 drugs)

Browse all the conditions that are associated with Haemoglobin abnormal:

Haemoglobin abnormal (1,008 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on l-ascorbic acid (the active ingredients of Vitamin c) and Vitamin c (the brand name). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered. Dosage of drugs is not considered in the study.

How to use the study?

DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.

Who is eHealthMe?

With medical big data and proven AI/ML algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 800+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).

WARNING, DISCLAIMER, USE FOR PUBLICATION

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.