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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

194 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 61 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 13:29 56.91 Kb 2199
11168 Response time GRH1.jpg admin 07 Jan, 2019 13:28 58.31 Kb 2184