Vitamin D3

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These pages hold in-progress web pages for the benefit of Rosacea Support Group members. Information provided herein is intended for informational purposes only and is not intended to replace medical advice offered by a physician or qualified healthcare provider. Feedback welcome to

Vitamin D3 (cholecalciferol)

Vitamin D3 In Immunity:

Recent studies suggest the importance of Vitamin D3 (Vit D3) in immunity. Vit D3 has been shown to promote the production of the human antimicrobial peptides, cathelicidins (LL-37), and cathelicidins have been found to have broad spectrum antimicrobial activity. Studies also suggest that it is unusual for bacteria to develop resistance to cathelicidins as they might from standard antibiotics:

Some microbes cathelicidins have been shown to have activity against include:

Vitamin D3 also seems to have important immunomodulating effects, both reducing levels of pro-inflammatory cytokines and increasing levels of anti-inflammatory cytokines:

Moreover, Vitamin D3 has been shown to contribute "to the regulation of development and function of mast cells, which play a critical role in several inflammatory disorders":

Vitamin D3 in Inflammatory / Autoimmune Disease and Cancers:

Vitamin D3 has been implicated as playing an important role in various inflammatory / autoimmune diseases, including diabetes, multiple sclerosis, rheumatoid arthritis, hypertension, cardiovascular heart disease, and many common deadly cancers.

A recent study suggests Vit D3 supplementation may promote up to a 77% reduction of cancer incidence:

Vitamin D3 and Skin Disease:

Studies suggest that Vit D3 plays an important role in skin wounds. Clinical trials of oral and topical Vitamin D3 in atopic dermatitis and acne are now underway:

Studies also suggest that Vit D3 may play an important role in proper sebaceous function and may help reduce sebum production:

In an old study (from 1937) of Vit D in acne, 75% of subjects were reported to be much better or healed at 3 months:

However, the following article seems to suggest that Dr Gallo - who remember previously found elevated kallikrein activated cathelicidins in rosacea patients - may not believe Vit D3 supplementation would help with rosacea.

It is to be hoped that this won't hold up studies of Vit D3 in rosacea, given the potential of Vit D3 to help with this condition. As the studies listed above indicate, it has potent immunomodulating effects. Additionally, the following studies suggest that Vit D3 intake may help prevent the increased angiogenesis found in rosacea and may even induce regression of the increased vascular supply found in rosacea:

Studes also suggest that Vit D3 intake may help control levels of matrix metalloproteinases (MMPs), some of which have been found to be elevated in rosacea:

Vitamin D3 and Ocular Disease:

Studies suggest that the cathelicidins induced by Vitamin D3 also play an important role in antimicrobial protection of the ocular surface and surround:

Vitamin D3 Supplementation & Safety:

Studies suggest Vitamin D3 (cholecalciferol) is more effective than Vitamin D2 so supplements should be clearly labeled as Vitamin D3 or "Vitamin D as cholecalciferol" or some combination of both in order to be certain that the supplement is not the more common Vitamin D2:

Also, the liquid or gel form Vitamin D3 supplements often contain added oils, and it has been suggested that many may find that these added oils may cause additional allergies, so dry form Vitamin D3 supplements MAY be a better option.

There is much controversy surrounding the optimum levels of Vit D3 supplementation, and while the currently established safe upper limit for Vit D3 is listed as 2000 IU per day for adults and children over the age of 12 months, many are now questioning this level and calling for the upper limit to be increased to levels as high as 10,000 IU:

Some suggest, however, that the safest way to get high levels of Vit D3 is through approximately 15-20 minutes of near full body exposure to the sun at peak sun times during the summer. In this amount of time at peak sun / peak sun months, skin produces approximately 10,000 IU of Vit D3. No additional Vit D3 is produced in longer exposure, and 10,000 IU is produced prior to any sunburn pinkness. Still, even 15-20 minutes of peak sun exposure may be difficult to obtain on a daily basis, and we will want to avoid any risk of making rosacea symptoms worse, so supplementation may make sense.

Supplementation may be contraindicated in certain diseases including sarcoidosis, so please talk to your doctor before taking high level supplements of Vit D3.


The following article gives an excellent overview of dosing guidelines, etc for Vit D3. It also gives guidelines for monitoring blood levels for Vit D:

The Vitamin D Council provides a link to what it considers a reliable home test for Vit D levels from the following link:

Below are some great video presentations that discuss many of the important aspects of Vit D3:

Below is an excellent website, with links to many additional published studies supporting the benefits of Vit D3:

Reports describing Vitamin D3's benefits by Oliver Gillie, a freelance medical researcher and writer, are available online. His latest report and older reports can be found, respectively, from the following links:

See also the following useful background link from Clinuvel, the makers of Scenesse.