I take 5,000 iu of vit D3.It helps my bone health due to osteoporosis and also helps the immune system.I know I feel better since I've taken it and also noticed for some reason I'm not losing as much hair.Vitamin D is a water soluble vitamin which means we can get rid of it from our bodies unlike some other vitamins that stay in fat cells, which are much harder to get rid of.As we age most of us are deficient in this vitamin.

I take 1000u daily and my husband takes 2000u a day. I ran out of it about 2 weeks ago and cant buy anymore right now and we both feel the difference

I too have seriously Issues with absorbing Vit D have bone density tests often . Take a Pill once a week for that .
But was told not to over do the Vit D or it can cause clumps of calicum deposits or something like this , but Yeah I take Vit D twice a day . I wish I could say it dose the same but Nope
But I have started Glicosamine Sulfate
500mg once a day Says it relieves Osteoarthritic Joint Pain Webber Naturals . Hope It helps will let you know . Good Luck my friend
Oh I just checked I take 1000 mg X 2 a day

Are you taking the D3 supplement 10,000 IU?

Hi Wendy, I suffer from many vitamin deficiencies Vitamin D being one of them. Vitamin D comes in many different ( mg) doses and you might want to just ask your doctor just FYI ,check some vitamin websites and WebMd . You may have really come up with something that works for you ( and maybe helpful to others ). Just be careful with the doses, anything can be harmful if taken too much .
Brenda