I don't think it does, I recently lost my husband (5 months ago) and step-son (11 months ago) and during the immediate time after their deaths, I lost a little, but when I started feeling "Normal" the weight came back.
I even gained weight, as I was in a deep depression and looked to food for comfort.
But with the time that has passed now, I feel ike I have to start living for me. I can't live for the dead anymore, and I have a wonderful guy helping me. He is my late husband's best friend since hgh school, just like a brother. He helps me keep centered on me, and lets me know that I am okay and that thinking of me is okay, since I am all I have left. Me and my animals.