Title
Subscribe to the Magazine for free
Subscribe for free to keep reading! If you are already subscribed, enter your email address to log back in.
Thanks for subscribing!
Oops! Something went wrong while submitting the form.
Are you a healthcare practitioner?
Thanks for subscribing!
Oops! Something went wrong while submitting the form.

What Causes High Testosterone Levels in Women?

Why This Was Updated?

Our specialists regularly review advancements in health and wellness, ensuring our articles are updated with the newest information as it becomes accessible.
Medically Reviewed by
Updated On
July 30, 2024

Testosterone is a hormone often associated with men, but it also plays an important role in women’s health. However, when testosterone levels become too high, it can lead to various health issues. Polycystic ovary syndrome (PCOS) is the most common cause of elevated testosterone levels in women, affecting approximately 5-10% of women of reproductive age. 

This article explores the implications, symptoms, and treatments of high testosterone levels in women, much like how a well-tuned engine is essential for a car's performance, yet any imbalance can lead to significant issues.

[signup]

Understanding Testosterone in Women 

Testosterone is vital for numerous physiological processes in women, and optimal levels help to support general health and wellness.

Normal Testosterone Levels in Women

Testosterone plays a significant role in women. It is produced in the ovaries and adrenal glands, it helps maintain bone mass, supports reproductive tissue growth and repair, and influences behavior, mood, libido, muscle mass, strength, and energy levels. It also aids in cognitive functions and overall well-being.

Normal testosterone levels in women vary by age and physiological conditions. A study in the Journal of Clinical Endocrinology and Metabolism stated that the normal testosterone range for women during their reproductive years is approximately 15-46 ng/dL. These levels fluctuate with menstrual cycles and typically decline with age. By menopause, testosterone levels can drop significantly, often leading to decreased libido, fatigue, and reduced muscle mass. 

Symptoms of High Testosterone

High testosterone levels in women can lead to various physical and psychological symptoms, significantly impacting quality of life and often requiring medical attention for proper management.

  • Excessive hair growth on the face, chest, and back (hirsutism)
  • Increased oil production, leading to severe acne
  • Development of male characteristics such as a deepened voice and clitoral enlargement
  • Irregular or absent menstrual periods
  • Increased aggression, irritability, and mood swings
  • Reduction in breast tissue
  • Unusual muscle growth and strength
  • Thinning hair or male-pattern baldness
  • Weight gain, particularly around the abdomen
  • Difficulty conceiving due to hormonal imbalances

Causes of High Testosterone in Women 

There are various medical conditions and external factors that can cause elevated testosterone levels in women:

Common Conditions Associated with High Testosterone

Several medical conditions can lead to elevated testosterone levels in women, each with distinct underlying mechanisms and symptoms. 

  • PCOS is the most common cause of elevated testosterone in women, affecting approximately 6-10% of those of reproductive age. It is characterized by irregular menstrual cycles, hirsutism, polycystic ovaries and often results in elevated androgen levels.
  • Congenital adrenal hyperplasia (CAH) involves genetic mutations that impair adrenal gland function, leading to excessive production of androgens. Symptoms in women with CAH may include severe acne, early onset of pubic hair, and virilization.
  • Androgen-based tumors in the ovaries or adrenal glands can significantly increase testosterone levels, often presenting with rapid onset of virilizing symptoms such as a deepening voice and increased muscle mass.

Lifestyle and Environmental Factors

Several lifestyle choices and environmental factors can significantly impact hormone levels, contributing to conditions such as high testosterone levels in women. 

Key factors include:

  • Chronic stress can elevate cortisol levels, disrupting the balance of other hormones, including testosterone.
  • A diet high in processed foods, sugars, and unhealthy fats can affect insulin resistance and inflammation.
  • Lack of physical activity can slow down metabolism and alter hormone production.
  • Exposure to endocrine-disrupting chemicals (EDCs) found in plastics, pesticides, and certain personal care products. These chemicals can mimic or block hormones, leading to imbalances that may raise testosterone levels.
  • Inadequate sleep and poor sleep quality have also been linked to hormonal disruptions, including increased testosterone.

Managing these lifestyle and environmental factors through healthier choices and minimizing exposure to harmful substances can help maintain a balanced hormone profile and mitigate the risk of high testosterone levels in women.

When to See a Doctor

Women should seek medical advice if they experience symptoms such as excessive facial or body hair growth, severe acne, irregular or absent menstrual periods, unexplained weight gain, or noticeable hair loss. Additionally, the development of male characteristics like a deepened voice, significant mood swings, or difficulties with fertility are important signs that warrant a doctor's attention. 

Persistent fatigue, changes in muscle mass, or any combination of these symptoms can indicate a hormonal imbalance, including high testosterone levels. Early consultation with a healthcare provider can lead to timely diagnosis and effective management of underlying conditions.

Diagnostic Tests

Diagnosing high testosterone levels in women involves a comprehensive approach that includes both clinical evaluation and laboratory testing. 

The process typically begins with a detailed medical history and physical examination to identify symptoms such as hirsutism, acne, and menstrual irregularities. 

Following this, specific laboratory tests are conducted to measure hormone levels. The most common initial tests are the measurement of total and free testosterone. Additional tests may include:

  • Dehydroepiandrosterone Sulfate (DHEA-S): Elevated levels can indicate adrenal gland involvement, such as in adrenal tumors or hyperplasia.
  • 17-Hydroxyprogesterone: Used to screen for congenital adrenal hyperplasia, a condition that can cause androgen excess.
  • Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH): These help evaluate ovarian function and can indicate conditions like PCOS.
  • Fasting Insulin: Elevated fasting insulin levels can indicate insulin resistance, which is often associated with high testosterone levels in women

[signup]

Treatment Options for High Testosterone 

Treatment options for high testosterone encompass medical or lifestyle modifications.

Medications and Medical Treatments

Managing high testosterone levels in women often involves a combination of medications and medical treatments tailored to address the underlying causes and symptoms. 

  • One commonly prescribed medication is spironolactone, an anti-androgen that helps reduce testosterone production and mitigate symptoms such as hirsutism and acne. Spironolactone works by blocking androgen receptors and inhibiting the enzyme 5-alpha-reductase, which converts testosterone to its more potent form, dihydrotestosterone (DHT). 
  • Another effective treatment is the use of oral contraceptives, which contain estrogen and progestin. These hormones help lower testosterone levels by increasing sex hormone-binding globulin (SHBG), which binds to testosterone and reduces its free, active form in the bloodstream. 
  • Additionally, metformin, a medication commonly used to treat type 2 diabetes, is often prescribed for women with PCOS to improve insulin sensitivity and lower testosterone levels. 

Lifestyle Modifications and Remedies

Managing high testosterone levels in women can often be achieved through various lifestyle modifications and natural remedies. These changes can help reduce symptoms and improve overall hormonal balance.

Dietary Adjustments

Incorporate a balanced diet rich in whole foods, including plenty of vegetables, lean proteins, and healthy fats. Avoid processed foods and sugars, which can exacerbate insulin resistance and high testosterone levels.

Regular Exercise

Engage in regular physical activity, particularly resistance training and high-intensity interval training (HIIT), which have been shown to help lower testosterone levels and improve insulin sensitivity.

Weight Management 

Maintain a healthy weight, as obesity is closely linked to higher testosterone levels. Even a modest weight loss of 5-10% can significantly improve testosterone levels.

Stress Reduction 

Practice stress-reducing techniques such as mindfulness, yoga, or meditation. Chronic stress can elevate cortisol levels, which in turn can influence testosterone production.

Adequate Sleep 

Ensure sufficient and quality sleep, as sleep deprivation can disrupt hormonal balance and increase testosterone levels.

Frequently Asked Questions (FAQs)

Here are commonly asked questions about testosterone levels in women:

Can High Testosterone Levels Affect My Fertility?

Yes, high testosterone levels can affect fertility. Hormonal imbalances can disrupt normal ovulation, making it difficult to conceive. Women with high testosterone levels, such as those with PCOS, often experience irregular menstrual cycles and other reproductive issues that can impact fertility.

Is It Hard To Lose Weight With High Testosterone In Females? 

Losing weight can be particularly challenging for women with high testosterone levels due to the association between hyperandrogenism and insulin resistance. In this condition, the body's cells become less responsive to insulin, leading to higher insulin levels that promote fat storage and make weight loss more difficult. 

Studies have shown that women with insulin resistance often struggle with weight management, as their bodies are more prone to storing fat, especially in the abdominal region. This creates a cycle where increased fat mass further exacerbates insulin resistance and hyperandrogenism, making weight loss even harder. Therefore, addressing insulin resistance through lifestyle changes and medical interventions is essential for effective weight management.

What Vitamins Lower Testosterone In Females?

Certain vitamins have been shown to help lower testosterone levels in females, particularly in those with conditions like PCOS

Vitamin D

Vitamin D supplementation has been found to reduce total testosterone levels in women with PCOS significantly. A meta-analysis of randomized controlled trials demonstrated that vitamin D supplementation improved hormonal profiles, including a reduction in total testosterone and improvements in insulin resistance, which is often associated with elevated testosterone levels.

Coenzyme Q10 (CoQ10) and Vitamin E

Additionally, vitamins such as CoQ10 and vitamin E have also been studied for their effects on testosterone levels. A clinical trial found that supplementation with CoQ10, either alone or in combination with vitamin E, significantly decreased serum total testosterone levels in women with PCOS.

[signup]

Key Takeaways

  • Testosterone supports bone mass, reproductive tissues, mood, libido, muscle strength, and energy levels in women.
  • High testosterone can cause excessive hair growth, severe acne, irregular periods, mood swings, weight gain, and fertility issues.
  • Conditions like PCOS, congenital adrenal hyperplasia, and androgen-secreting tumors, along with lifestyle factors such as stress and poor diet, can raise testosterone levels.
  • Diagnosis involves clinical evaluations and hormone tests. Treatments include medications like anti-androgens and lifestyle changes including a balanced diet and regular exercise.
  • Early intervention by a healthcare provider can help manage symptoms and address underlying health issues.
The information provided is not intended to be a substitute for professional medical advice. Always consult with your doctor or other qualified healthcare provider before taking any dietary supplement or making any changes to your diet or exercise routine.
Learn More
No items found.

Lab Tests in This Article

No items found.
  1. 17-Hydroxyprogesterone | Rupa Health. (n.d.). Rupa Health. https://www.rupahealth.com/biomarkers/17-hydroxyprogesterone
  2. Braunstein, G. D., Reitz, R. E., Buch, A., Schnell, D., & Caulfield, M. P. (2011). Testosterone Reference Ranges in Normally Cycling Healthy Premenopausal Women. ˜the œJournal of Sexual Medicine, 8(10), 2924–2934. https://doi.org/10.1111/j.1743-6109.2011.02380.x
  3. Christie, J. (2024a, April 2). A Root Cause Medicine Protocol for PCOS. Rupa Health. https://www.rupahealth.com/post/a-root-cause-medicine-protocol-for-pcos
  4. Christie, J. (2024b, May 23). An Integrative and Functional Nutrition Approach to Obesity and Weight Management. Rupa Health. https://www.rupahealth.com/post/an-integrative-approach-to-obesity
  5. Christie, J. (2024c, May 28). 7 Functional Medicine Labs to Test for Root Cause of Infertility in Women. Rupa Health. https://www.rupahealth.com/post/7-functional-medicine-labs-to-test-for-root-cause-of-infertility-in-women
  6. Cloyd, J. (2024a, April 9). A Functional Medicine PCOS Protocol: Comprehensive Testing, Therapeutic Diet, and Supplements. Rupa Health. https://www.rupahealth.com/post/a-functional-medicine-pcos-protocol-comprehensive-testing-therapeutic-diet-and-supplements
  7. Cloyd, J. (2024b, May 6). Hormones Affecting Sleep (w/ Lifestyle and Dietary Strategies). Rupa Health. https://www.rupahealth.com/post/hormones-affecting-sleep-w-lifestyle-and-dietary-strategies
  8. Cloyd, K. (2024, May 24). Endocrine Disruptors: Unveiling the Impact of Environmental Factors on Hormonal Health. Rupa Health. https://www.rupahealth.com/post/endocrine-disruptors-unveiling-the-impact-of-environmental-factors-on-hormonal-health
  9. Coenzyme Q10 | Rupa Health. (n.d.). Rupa Health. https://www.rupahealth.com/biomarkers/coq10
  10. Coleman, E. (2024, April 12). Hormonal Imbalance - All You Need to Know in 2024. Rupa Health. https://www.rupahealth.com/post/hormonal-imbalance-all-you-need-to-know-in-2024
  11. Cussen, L., McDonnell, T., Bennett, G., Thompson, C. J., Sherlock, M., & O’Reilly, M. W. (2022). Approach to androgen excess in women: Clinical and biochemical insights. Clinical Endocrinology, 97(2), 174–186. https://doi.org/10.1111/cen.14710
  12. Daglis, S. (2024, May 24). Berberine Vs. Metformin: The Similarities and Differences You Should Know. Rupa Health. https://www.rupahealth.com/post/berberine-vs-metformin-similarities-differences
  13. Davis, S. R., & Wahlin-Jacobsen, S. (2015). Testosterone in women—the clinical significance. ˜the œLancet. Diabetes & Endocrinology, 3(12), 980–992. https://doi.org/10.1016/s2213-8587(15)00284-3
  14. DeCesaris, L. (2024a, April 9). How Different Exercises Affect Women's Hormones. Rupa Health. https://www.rupahealth.com/post/exercise-affects-on-womens-hormones
  15. DeCesaris, L. (2024b, April 9). How to Support a Healthy Menstrual Cycle. Rupa Health. https://www.rupahealth.com/post/how-to-support-a-healthy-menstrual-cycle
  16. DePorto, T. (2024, April 2). Understanding Acne and How to Treat it Naturally. Rupa Health. https://www.rupahealth.com/post/understanding-acne-and-how-to-treat-it-naturally
  17. DHEA-S | Rupa Health. (n.d.). Rupa Health. https://www.rupahealth.com/biomarkers/dhea-s
  18. Dihydrotestosterone | Rupa Health. (n.d.). Rupa Health. https://www.rupahealth.com/biomarkers/dht
  19. Elevated serum testosterone, hirsutism, and virilism associated with combined androgen-estrogen hormone replacement therapy. (1991, April 1). PubMed. https://pubmed.ncbi.nlm.nih.gov/2002984/
  20. Fasting Insulin | Rupa Health. (n.d.). Rupa Health. https://www.rupahealth.com/biomarkers/fasting-insulin
  21. Garrison, K. (2024a, May 6). Cortisol and Stress: Exploring the Connection for Better Health. Rupa Health. https://www.rupahealth.com/post/cortisol-and-stress-exploring-the-connection-for-better-health
  22. Garrison, K. (2024b, May 28). Cortisol and Stress: Exploring the Connection for Better Health. Rupa Health. https://www.rupahealth.com/post/cortisol-and-stress-exploring-the-connection-for-better-health
  23. Greenan, S. (2024, May 28). 7 Early Signs Of Insulin Resistance. Rupa Health. https://www.rupahealth.com/post/what-is-insulin-resistance
  24. Hao, S., Zhang, C., & Meng, X. (2023). Comparison of different drug for reducing testosterone levels in women with polycystic ovary syndrome: A systematic review and network meta-analysis. Medicine, 102(41), e35152. https://doi.org/10.1097/md.0000000000035152
  25. Hirsutism - Symptoms & causes - Mayo Clinic. (2021, October 12). Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/hirsutism/symptoms-causes/syc-20354935
  26. Izadi, A., Ebrahimi, S., Shirzai, S., Taghizadeh, S., Parizad, M., Farzadi, L., & Gargari, B. P. (2018). Hormonal and Metabolic Effects of Coenzyme Q10 and/or Vitamin E in Patients with Polycystic Ovary Syndrome. ˜the œJournal of Clinical Endocrinology and Metabolism/Journal of Clinical Endocrinology & Metabolism. https://doi.org/10.1210/jc.2018-01221
  27. LeVee, A., Suppogu, N., Walsh, C., Sacks, W., Simon, J., & Shufelt, C. (2021). The Masquerading, Masculinizing Tumor: A Case Report and Review of the Literature. Journal of Women’s Health, 30(7), 1047–1051. https://doi.org/10.1089/jwh.2020.8548
  28. Maholy, N. (2024a, April 2). How Processed Sugar Affects Our Health. Rupa Health. https://www.rupahealth.com/post/how-processed-sugar-affects-our-health
  29. Maholy, N. (2024b, May 28). How to Reduce Stress Through Mind-Body Therapies. Rupa Health. https://www.rupahealth.com/post/how-to-reduce-stress-through-mind-body-therapies
  30. Milman, L. W., Sammel, M. D., Barnhart, K. T., Freeman, E. W., & Dokras, A. (2015). Higher serum total testosterone levels correlate with increased risk of depressive symptoms in Caucasian women through the entire menopausal transition. Psychoneuroendocrinology, 62, 107–113. https://doi.org/10.1016/j.psyneuen.2015.07.612
  31. Patel, P., & Abate, N. (2013). Body Fat Distribution and Insulin Resistance. Nutrients, 5(6), 2019–2027. https://doi.org/10.3390/nu5062019
  32. Patibandla, S., Heaton, J., & Kyaw, H. (2023, July 4). Spironolactone. StatPearls - NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK554421/
  33. Preston, J. (2024a, April 9). Benefits and Risks of the Top 5 Most Common Prescriptive Birth Control Methods. Rupa Health. https://www.rupahealth.com/post/benefits-and-risks-of-the-top-5-most-common-prescriptive-birth-control-methods
  34. Preston, J. (2024b, May 23). An Integrative Medicine Approach to Managing Menopause Symptoms. Rupa Health. https://www.rupahealth.com/post/an-integrative-medicine-approach-to-managing-menopause-symptoms
  35. Professional, C. C. M. (n.d.). Hyperandrogenism. Cleveland Clinic. https://my.clevelandclinic.org/health/diseases/24639-hyperandrogenism
  36. Redmond, G. P., & Bergfeld, W. F. (1990). Diagnostic approach to androgen disorders in women: acne, hirsutism, and alopecia. Cleveland Clinic Journal of Medicine, 57(5), 423–427. https://doi.org/10.3949/ccjm.57.5.423
  37. Sex Hormone-Binding Globulin | Rupa Health. (n.d.). Rupa Health. https://www.rupahealth.com/biomarkers/shbg
  38. Sharma, A., & Welt, C. K. (2021). Practical Approach to Hyperandrogenism in Women. Medical Clinics of North America/˜the œMedical Clinics of North America, 105(6), 1099–1116. https://doi.org/10.1016/j.mcna.2021.06.008
  39. Stanford, J. (2024, May 16). Pro-Inflammatory Foods: What to Avoid and Why. Rupa Health. https://www.rupahealth.com/post/pro-inflammatory-foods-what-to-avoid-and-why
  40. Sweetnich, J. (2023, April 17). Functional Medicine Protocol for Low Libido in Women. Rupa Health. https://www.rupahealth.com/post/functional-medicine-protocol-for-low-libido-in-women
  41. Sweetnich, J. (2024a, April 2). Vitamin D 101. Rupa Health. https://www.rupahealth.com/post/vitamin-d-101-testing-rdas-and-supplementing
  42. Sweetnich, J. (2024b, April 2). Vitamin E 101: Exploring Testing, Health Benefits, and Sources of This Antioxidant Powerhouse. Rupa Health. https://www.rupahealth.com/post/vitamin-e-101
  43. Testosterone | Rupa Health. (n.d.). Rupa Health. https://www.rupahealth.com/biomarkers/testosterone
  44. Weinberg, J. L. (2024a, April 2). The Science of Sleep: Functional Medicine for Restorative Sleep. Rupa Health. https://www.rupahealth.com/post/the-science-of-sleep-functional-medicine-for-restorative-sleep
  45. Weinberg, J. L. (2024b, April 9). A Functional Medicine Non Alcoholic Fatty Liver Disease (NAFLD) Protocol: Testing, Nutrition, and Supplements. Rupa Health. https://www.rupahealth.com/post/a-functional-medicine-non-alcoholic-fatty-liver-disease-nafld-protocol-testing-nutrition-and-supplements
  46. Weinberg, J. L. (2024c, April 9). What is The Mediterranean Diet? Rupa Health. https://www.rupahealth.com/post/4-science-backed-health-benefits-of-the-mediterranean-diet
  47. Weinberg, J. L. (2024d, May 17). What is Congenital Adrenal Hyperplasia?: Testing and Treatments. Rupa Health. https://www.rupahealth.com/post/what-is-congenital-adrenal-hyperplasia-testing-and-treatments
  48. Yoshimura, H. (2023, November 28). Guarding Your Health: Proactive Steps to Ward Off Insulin Resistance. Rupa Health. https://www.rupahealth.com/post/guarding-your-health-proactive-steps-to-ward-off-insulin-resistance
  49. Yoshimura, H. (2024a, April 2). Balancing Hormones in Younger Women: A Comprehensive Guide to Hormonal Health. Rupa Health. https://www.rupahealth.com/post/balancing-hormones-in-younger-women-a-comprehensive-guide-to-hormonal-health?utm_source=google&utm_medium=cpc&utm_campaign=20893116874&utm_content=&utm_term=&gad_source=1&gclid=Cj0KCQjwpNuyBhCuARIsANJqL9NZC0rpOjt2mpQxLAAVYVgixuVgmndoEY3MoqA2aYdZQAuJm1MCQ7IaAuTNEALw_wcB
  50. Yoshimura, H. (2024b, May 14). The Remarkable Power of Exercise on Our Health: A Comprehensive Overview. Rupa Health. https://www.rupahealth.com/post/the-remarkable-power-of-exercise-on-our-health-a-comprehensive-overview
  51. Zhao, J., Li, B., & Zhang, Q. (2021). Vitamin D improves levels of hormonal, oxidative stress and inflammatory parameters in polycystic ovary syndrome: a meta-analysis study. Annals of Palliative Medicine, 10(1), 169–183. https://doi.org/10.21037/apm-20-2201
Subscribe to the Magazine for free to keep reading!
Subscribe for free to keep reading, If you are already subscribed, enter your email address to log back in.
Thanks for subscribing!
Oops! Something went wrong while submitting the form.
Are you a healthcare practitioner?
Thanks for subscribing!
Oops! Something went wrong while submitting the form.
See All Magazine Articles
Trusted Source
The Journal of Pediatrics
Peer Reviewed Journal
Visit Source
CDC
Government Authority
Visit Source
Office of Dietary Supplements
Government Authority
Visit Source
National Heart Lung and Blood Institute
Government Authority
Visit Source
National Institutes of Health
Government Authority
Visit Source
Clinical Infectious Diseases
Peer Reviewed Journal
Visit Source
Brain
Peer Reviewed Journal
Visit Source
The Journal of Rheumatology
Peer Reviewed Journal
Visit Source
Journal of the National Cancer Institute (JNCI)
Peer Reviewed Journal
Visit Source
Journal of Cardiovascular Magnetic Resonance
Peer Reviewed Journal
Visit Source
Hepatology
Peer Reviewed Journal
Visit Source
The American Journal of Clinical Nutrition
Peer Reviewed Journal
Visit Source
The Journal of Bone and Joint Surgery
Peer Reviewed Journal
Visit Source
Kidney International
Peer Reviewed Journal
Visit Source
The Journal of Allergy and Clinical Immunology
Peer Reviewed Journal
Visit Source
Annals of Surgery
Peer Reviewed Journal
Visit Source
The Journal of Neurology, Neurosurgery & Psychiatry
Peer Reviewed Journal
Visit Source
Chest
Peer Reviewed Journal
Visit Source
Blood
Peer Reviewed Journal
Visit Source
Gastroenterology
Peer Reviewed Journal
Visit Source
The American Journal of Respiratory and Critical Care Medicine
Peer Reviewed Journal
Visit Source
The American Journal of Psychiatry
Peer Reviewed Journal
Visit Source
Diabetes Care
Peer Reviewed Journal
Visit Source
The Journal of the American College of Cardiology (JACC)
Peer Reviewed Journal
Visit Source
The Journal of Clinical Oncology (JCO)
Peer Reviewed Journal
Visit Source
Journal of Clinical Investigation (JCI)
Peer Reviewed Journal
Visit Source
Circulation
Peer Reviewed Journal
Visit Source
JAMA Internal Medicine
Peer Reviewed Journal
Visit Source
PLOS Medicine
Peer Reviewed Journal
Visit Source
Annals of Internal Medicine
Peer Reviewed Journal
Visit Source
Nature Medicine
Peer Reviewed Journal
Visit Source
The BMJ (British Medical Journal)
Peer Reviewed Journal
Visit Source
The Lancet
Peer Reviewed Journal
Visit Source
Journal of the American Medical Association (JAMA)
Peer Reviewed Journal
Visit Source
Pubmed
Comprehensive biomedical database
Visit Source
Harvard
Educational/Medical Institution
Visit Source
Cleveland Clinic
Educational/Medical Institution
Visit Source
Mayo Clinic
Educational/Medical Institution
Visit Source
The New England Journal of Medicine (NEJM)
Peer Reviewed Journal
Visit Source
Johns Hopkins
Educational/Medical Institution
Visit Source