Vitamin D is often touted as a supplement that everyone should take. Yet over the past several years, studies have shown that the vitamin appears to have a Goldilocks zone: too little or too much may be detrimental. Douglas Kiel (Beth Israel Deaconess) is mentioned.
If you can’t sign in to your HMS account, try using your existing HarvardKey password for your HMS account. If using your HarvardKey password for your HMS account doesn’t work, reset the password for your HarvardKey account, then use your HarvardKey password to sign in to both accounts.
