B12 and Hair thinning for Women aged 60+ (a phase IV clinical study of FDA data)

Summary:

Hair thinning is found for women aged 60+ who take B12 (cobalamin). This study is created by eHealthMe based on reports of 30,949 women aged 60+ from the FDA, and is updated regularly. The information that eHealthMe analyzes includes:

Time on B12 when people have Hair thinning
Top conditions
Top co-used drugs
Top other side effects

On Jun, 17, 2026

30,949 women aged 60+ reported to have side effects when taking B12.
Among them, 949 people (3.07%) have Hair thinning

What is B12?

B12 has active ingredients of cobalamin. It is often used in vitamin b12 deficiency. eHealthMe is studying from 121,894 B12 users. Check the latest studies of B12.

What is Hair thinning?

Hair thinning is found to be associated with 3,492 drugs and 3,685 conditions by eHealthMe. Check the latest studies of Hair thinning.

Number of reports submitted per year:

Could B12 cause Hair thinning in women aged 60+?

Time on B12 when people have Hair thinning *

Severity of Hair thinning

n/a

How people recovered from Hair thinning

n/a

Top conditions involved for these people *:

You may use this to check any potential undetected conditions.

Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 100 people, 10.54%
High Blood Pressure: 99 people, 10.43%
Breast Cancer Female: 93 people, 9.80%
Breast Cancer Metastatic: 68 people, 7.17%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 60 people, 6.32%
Breast Cancer: 59 people, 6.22%
High Blood Cholesterol: 55 people, 5.80%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 41 people, 4.32%
Pain: 40 people, 4.21%
Neuroendocrine Tumor: 38 people, 4.00%

Top co-used drugs for these people *:

You may use this to check any potential interacting drugs.

Top other side effects for these people *:

You may use this to check any potential undetected side effects.

Diarrhea: 198 people, 20.86%
Joint Pain: 154 people, 16.23%
Nausea (feeling of having an urge to vomit): 140 people, 14.75%
Weakness: 138 people, 14.54%
Headache (pain in head): 125 people, 13.17%
Pain In Extremity: 124 people, 13.07%
Rashes (redness): 124 people, 13.07%
Pain: 101 people, 10.64%
Malaise (a feeling of general discomfort or uneasiness): 99 people, 10.43%
Dizziness: 97 people, 10.22%

* Approximation only. Some reports may have incomplete information.

Do you take B12 and have Hair thinning?

- Check whether Hair thinning 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

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.

Related studies:

B12 and Hair thinning

How the study uses the data?

The study is based on (applicable) gender, age, cobalamin (the active ingredients of B12) and B12 (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.

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.