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Respond to daily Vitamin D in 2-12 months

Most responses to daily oral Vitamin D plateau in 2 or 3 months

Grassroots Health


Perhaps much slower response time if person is not healthy/ is needing lots of vitamin D


Vitamin D Levels Plateau typically in 11 weeks (Vitamin D starts to help in about half that time)

Many Vitamin D trials last 3 months or less

However, sometimes responses do not plateau for 4-12 months

No one seems to know why some people respond slowly

Slow responses might be due to differences in

Example Heaney 2003: 38 years old, healthy, men

Nutrition: US recommendations fail to correct vitamin D deficiency
From Heaney 2003

Doubt that the response is the same for:
   very young, very old, unhealthy, females, starting with >50 ng or < 10 ng, etc.

A loading dose increases Vitamin D levels 30X faster

Loading Dose of Vitamin D category has the following

204 items in category
see also Overview Loading of vitamin D   Overview Toxicity of vitamin D
Better than Daily 1: Fewer chances to forget, 2) Gets past receptor barrier
Injection category has 62 items
It appears that over 1 million Vitamin D loading doses have been taken
Doses ranged from 100,000 to 600,000 IU over a period of a day to a month
No reports of serious adverse reactions
Many studies report on the benefits resulting from loading doses

TOP articles in Loading Dose of Vitamin D

10,000 IU of Vitamin D for 7 years with no excessive Calcium in 4,800 patients – Dec 2018


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Created by admin. Last Modification: Friday March 4, 2022 16:20:19 GMT-0000 by admin. (Version 14)

Attached files

ID Name Comment Uploaded Size Downloads
11169 Response time GRH2.jpg admin 07 Jan, 2019 56.91 Kb 2470
11168 Response time GRH1.jpg admin 07 Jan, 2019 58.31 Kb 2462