Recent Blog Articles
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15477/conversions/59f61b05-2e23-463a-a0f7-b8aef6addd73-micro.jpg)
Testosterone-blocking drugs boost heart disease risk when given in combination
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15472/conversions/9f706d6e-3ba5-441f-a1ce-d93af96cdb5d-micro.jpg)
Parenting isn't easy: Two important skills can help
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14937/conversions/fcff561e-5fc9-4fbd-aac0-b9ea3778052b-micro.jpg)
Does sleeping with an eye mask improve learning and alertness?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15415/conversions/2acee670-1e43-413e-a07b-437512d22803-micro.jpg)
Do tattoos cause lymphoma?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14051/conversions/dea50ed5-99ea-4779-aa5b-56fae11aaa92-micro.jpg)
Hot weather hikes: Staying safe when temperatures spike
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15405/conversions/f22b5f3d-fd64-479d-b10a-b2409347f160-micro.jpg)
Cannabis drinks: How do they compare to alcohol?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15404/conversions/ccd2e44a-96c4-492f-a05c-c2706549efc0-micro.jpg)
What is Lewy body dementia?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15083/conversions/2fa8315b-f48e-43fb-8b56-d681a1715343-micro.jpg)
Dog bites: How to prevent or treat them
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15386/conversions/33679f9f-8065-4e13-a188-2ca67472b36f-micro.jpg)
Ever read your medical record? Here's why you should
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14810/conversions/778f3d8c-0b73-420c-8d03-e8542d49660d-micro.jpg)
Shining light on night blindness
Harvard Health Experts and Contributors
List of Experts
![photo of A. Enrique Caballero, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/hz1AgbcGa1YyKeLcnWPIdAFMqLCFPMzacHc5BtNg.jpg)
A. Enrique Caballero, MD
Contributor
![photo of Alice Cai, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/10284/ERAS-2.jpg)
Alice Cai, MD
Contributor
![photo of Johanna Calderon, PhD](https://domf5oio6qrcr.cloudfront.net/medialibrary/10002/Calderon_Johanna-2.jpg)
Johanna Calderon, PhD
Contributor
![photo of Steve Calechman](https://d2icykjy7h7x7e.cloudfront.net/authors/KkLZAzQCzWFQ08kCO6hO4pQ2HQoJCccSKA9DxATk.jpg)
Steve Calechman
Contributor
![photo of Marcelo Campos, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/X2FngBj3RaZgCSA3qVIeg2GOeplUTRsoO3kDFmYL.jpg)
Marcelo Campos, MD
Contributor
![photo of Christopher P. Cannon, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/mjZEhXP5MlckGcpBwtSOOH6XxRmkaf56pXc55t6I.jpg)
Christopher P. Cannon, MD
Editor in Chief, Harvard Heart Letter; Editorial Advisory Board Member, Harvard Health Publishing
![photo of James Cartreine, PhD](https://domf5oio6qrcr.cloudfront.net/medialibrary/8716/JimC.jpeg)
James Cartreine, PhD
Contributing Editor
![photo of Valeria Chambers, EdM, CAS, CPS](https://d2icykjy7h7x7e.cloudfront.net/authors/LQDTNiyfdjxVnLmLClCWyKhTsXMVMEuXiDa9cCwd.jpg)
Valeria Chambers, EdM, CAS, CPS
Guest Contributor
![photo of Michelle Chan, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/pvf1jNzmVEq1eQVqeYsuwwELMQK3vwomQT1rb2nM.jpg)
Michelle Chan, MD
Contributor
![photo of Andrew Chan, MD, MPH](https://domf5oio6qrcr.cloudfront.net/medialibrary/9831/20170313_asa_chan_009.labheadshot2.jpg)
Andrew Chan, MD, MPH
Contributor
![photo of Elena H. Chartoff, PhD](https://domf5oio6qrcr.cloudfront.net/medialibrary/9302/RS66_Chartoff-2015-head-shot-SMALL-2.jpg)
Elena H. Chartoff, PhD
Contributor
![photo of Isabelle Chase, DDS, FRCD(C)](https://d2icykjy7h7x7e.cloudfront.net/authors/BH2bhTJXI8qaBtvAFc9ArIQgSI10jwUrSLJmiA58.jpg)
Isabelle Chase, DDS, FRCD(C)
Contributor
![photo of Adam S. Cheifetz, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/MRIElEqmoNZZaYg6szgCH7wAry8nr7dEBZ8MlH4D.jpg)
Adam S. Cheifetz, MD
Contributor
![photo of Justin A. Chen, MD, MPH](https://d2icykjy7h7x7e.cloudfront.net/authors/xoYgtvNagxJOazE5rhPEc2ikICbqY0yzwst3WmSy.jpg)
Justin A. Chen, MD, MPH
Contributor
![photo of Steven Chen, MD, MPH](https://d2icykjy7h7x7e.cloudfront.net/authors/GREVbFJ8xyMbl3iI3GNWIwCVLVbKk3t9Ci4voUed.jpg)
Steven Chen, MD, MPH
Contributor
![photo of Hsinlin Thomas Cheng, MD, PhD](https://domf5oio6qrcr.cloudfront.net/medialibrary/10166/HTC-picture.4.2017.jpg)
Hsinlin Thomas Cheng, MD, PhD
Contributor
![photo of Andrea Chisholm, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/9036/Andrea-About.com_ps.jpg)
Andrea Chisholm, MD
Contributor
![photo of Andrea S. Christopher, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/8903/Andrea-Christopher2.jpg)
Andrea S. Christopher, MD
Contributor
![photo of Raymond Chung, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/9777/Raaymond-Chung.jpg)
Raymond Chung, MD
Contributor
![photo of Bruce M. Cohen, MD, PhD](https://domf5oio6qrcr.cloudfront.net/medialibrary/9923/Bruce-Cohen-headshot.jpg)
Bruce M. Cohen, MD, PhD
Contributor
![photo of Stephanie Collier, MD, MPH](https://d2icykjy7h7x7e.cloudfront.net/authors/NtniFzoHBf79gHOJQE5pcKpakG5kAlB1oJsx9Jc9.jpg)
Stephanie Collier, MD, MPH
Contributor; Editorial Advisory Board Member, Harvard Health Publishing
![photo of Francesca Coltrera](https://d2icykjy7h7x7e.cloudfront.net/authors/TqVPF0YGx0xJcBXxPlTy6uaaWpQEzL1twZBXNs9d.jpg)
Francesca Coltrera
Editor, Harvard Health Blog
![photo of Amy S. Colwell, MD, FACS](https://d2icykjy7h7x7e.cloudfront.net/authors/wbvMqZrrQB1YmIf9MiE1wikk6ptCvhAzUNgdGci4.jpg)
Amy S. Colwell, MD, FACS
Contributor
![photo of Amy Comander, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/jWWgE8fmuGgJO6aQI0b99WhFyEFWweLVbdjGwxgF.jpg)
Amy Comander, MD
Contributor
![photo of Hilary Connery, MD, PhD](https://d2icykjy7h7x7e.cloudfront.net/authors/NJPGWy33X3dvykfgBzbUEkvvtECwBVw1bKcnQAEQ.png)
Hilary Connery, MD, PhD
Contributor
Recent Blog Articles
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15477/conversions/59f61b05-2e23-463a-a0f7-b8aef6addd73-micro.jpg)
Testosterone-blocking drugs boost heart disease risk when given in combination
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15472/conversions/9f706d6e-3ba5-441f-a1ce-d93af96cdb5d-micro.jpg)
Parenting isn't easy: Two important skills can help
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14937/conversions/fcff561e-5fc9-4fbd-aac0-b9ea3778052b-micro.jpg)
Does sleeping with an eye mask improve learning and alertness?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15415/conversions/2acee670-1e43-413e-a07b-437512d22803-micro.jpg)
Do tattoos cause lymphoma?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14051/conversions/dea50ed5-99ea-4779-aa5b-56fae11aaa92-micro.jpg)
Hot weather hikes: Staying safe when temperatures spike
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15405/conversions/f22b5f3d-fd64-479d-b10a-b2409347f160-micro.jpg)
Cannabis drinks: How do they compare to alcohol?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15404/conversions/ccd2e44a-96c4-492f-a05c-c2706549efc0-micro.jpg)
What is Lewy body dementia?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15083/conversions/2fa8315b-f48e-43fb-8b56-d681a1715343-micro.jpg)
Dog bites: How to prevent or treat them
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15386/conversions/33679f9f-8065-4e13-a188-2ca67472b36f-micro.jpg)
Ever read your medical record? Here's why you should
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14810/conversions/778f3d8c-0b73-420c-8d03-e8542d49660d-micro.jpg)
Shining light on night blindness