One pill every two weeks gives you all the vitamin D most adults need

50,000 IU of Vitamin D once every two weeks proven to prevent/treat:

Diabetes + Heart Failure + Chronic Pain + Depression + Autism + Breast Cancer + Colon Cancer + Prostate Cancer + BPH (prostate) + Preeclampsia + Premature Birth + Falls + Cognitive Decline + Respiratory Tract Infection + Influenza + Tuberculosis + Chronic Obstructive Pulmonary Disease + Lupus + Inflammatory Bowel Syndrome + Urinary Tract Infection + Poor Sleep + Growing Pain + Multiple Sclerosis + PMS + Schizophrenia + Endometriosis + Smoking     27 problems

    Note: Once a week also fights: COVID, Headaches, Colds, Fibromyalgia, Asthma, Hives, Colitis etc.

See down this page: Additional health problems fought by 50,000 Vitamin DWEEKLY

33 additional, for a total of 61 health problems fought if take 50,000 IU weekly

Diabetes

• Diabetes helped by daily 4,000 IU of Vitamin D – meta-analysis Sept 2017

  • which is very close to 50,000 IU every two weeks

• Diabetes treated if given enough vitamin D (example: 50,000 IU weekly) – review of RCT - Jan 2017

• Gestational Diabetes reduced with 50,000 IU of vitamin D every 3 weeks and daily Calcium – RCT June 2014

• Prediabetes reduced by monthly 60,000 IU of vitamin D – RCT May 2015

• Diabetes (Type 1) 14X more likely in dark skin children with low levels of vitamin D – May 2015

• Many Diabetics guts poorly absorb standard vitamin D - need an injection of gut-friendly form

• Diabetics helped by vitamin D in 5 ways – meta-analysis June 2018

  Heart Failure

• Stroke or coronary heart disease deaths 30% less likely if had taken more than 440 IU of vitamin D (900,000 patient years) – Jan 2018

• Cardiovascular deaths 12 percent less likely if have 10 ng more vitamin D – meta-analysis March 2017

• Chronic Heart Failure reduced by 4,000 IU daily for a year – RCT April 2016

• Seniors with Heart Failure helped by daily 4,000 IU of vitamin D (increase 16 ng) – RCT Aug 2014

• Congestive heart failure in infants virtually cured by 1000 IU of vitamin D – RCT Feb 2012

• Acute Heart Failure length of stay and readmission rates cut in half if high vitamin D – Aug 2017

• 7X increased chance of death if coronary artery disease and low vitamin D – Oct 2013

  Chronic Pain

• Chronic Pain reported 38 percent less often if supplemented with Vitamin D – meta-analysis Sept 2016

  • Note - many studies found a variety of types of pain were prevented or relieved by weekly 50,000 IU

• Shin pain in elderly men 36 X more likely if low vitamin D – March 2017

• Back and leg pain lasts a year longer if low vitamin D – April 2017

• Fibromyalgia treated with Vitamin D (50,000 IU weekly for 3 months) – 2016, 2017, 2018, 2019

Depression

• Anti-depression medication about as good as big increase in vitamin D – meta-analysis of flawless data April 2014

• Depression in adolescent girls reduced somewhat by 50,000 IU weekly for 9 weeks – July 2017

• Vitamin D depression RCT canceled: too many were taking Vitamin D supplements, etc. Feb 2018

Autism

• Autism treated by Vitamin D (80 – 120 ng) – Cannell update May 2018

• Autism risk factors – many are associated with low vitamin D – meta-meta-analysis March 2017

• Vitamin D and autism - treat: 300 IU per kg per day, prevent: during pregnancy 5,000 IU – Feb 2017

• Autistic children were 3.6 X more likely to have low levels of vitamin D – Nov 2017

Breast cancer

• Breast Cancer 80 percent less likely if high level of vitamin D – June 2018

• Breast Cancer prevented by Vitamin D (most studies concur) – Dec 2017

• Breast cancer 60% reduction with 1100 IU of Vitamin D - RCT

• Breast Cancer Mortality reduced 60 percent if more than 60 ng of Vitamin D – meta-analysis June 2017

• 17 meta-analyses of Breast Cancer as of Sept 2017

Colon Cancer

• Colorectal cancer is associated with Vitamin D (17 meta-analyses so far) – July 2018

• Colorectal cancer 60 percent less likely if have more than 50 ng of vitamin D (vs 5 ng) – meta-analysis April 2017

• Colon cancer – how vitamin D prevents and treats it – Nov 2014

• 45 percent fewer deaths from digestive cancers for 10 ng increase in vitamin D – 2006

Prostate Cancer

• Prostate cancer risk increase with Vitamin D (other studies disagree) – meta-analysis Jan 2018

• Prostate cancer reduced when 4000 IU vitamin D was added– Hollis RCT April 2015

• Prostate cancer in veterans more survivable when have enough vitamin D – Jan 2014

• 7X increase in stage IV Prostate Cancer survival when vitamin D greater than 32 ng – May 2013

Enlarged prostate

• BPH (PSA) decreased by Vitamin D (50,000 IU bi-weekly) – RCT Nov 2020

Preeclampsia

• Preeclampsia recurrence reduced 2 X by 50,000 IU of vitamin D every two weeks – RCT July 2017

• Preeclampsia reduced by Vitamin D (50,000 IU bi-weekly) and Calcium – Oct 2015

• Preeclampsia rate cut in half by high level of vitamin D – meta-analysis March 2014

• Preeclampsia 2.7X more frequent if low vitamin D – meta-analysis Sept 2013

Premature Birth

• Vitamin D intervention reduces preterm births and low birth weight by 60 percent – Cochrane Reviews – Nov 2017

• Preterm birth rate reduced 57 percent by Vitamin D – Nov 2015 4,000 IU?

• Preterm birth rate reduced by 43 percent with adequate Vitamin D supplementation – meta-analysis Feb 2017

Falls

• Falls cut in half by 100,000 IU vitamin D monthly - RCT 2016

• Elderly falls reduced 3.6 times by 900 IU of vitamin D and simple exercise – RCT Nov 2016

• 39% fewer falls with 2000 IU than 800 IU – RCT June 2010

• Hip fracture 58 percent more likely if low vitamin D – meta-analysis March 2017

• Free Vitamin D in New Zealand to prevent falls in nursing homes (50,000 IU monthly) – June 2016

Cognitive Decline

• Cognition of Alzheimer’s patients improved by daily 4,000 IU of vitamin D – RCT Jan 2015

• 2,000 IU of vitamin D reduced schizophrenia chance by 77 percent (male infants) - 2004

• Severe Alzheimer's delayed by 1 year with vitamin D intervention – March 2014

• Mental health intervention trials using enough vitamin D for long enough found benefits – Jan 2017

Respiratory Tract Infection

• Respiratory Tract Infection visits 2.5 less likely with vitamin D: Pregnancy 2000 IU, Infant 800 IU – RCT Oct 2014

• Respiratory infections (RTI) cut in half by 20,000 IU weekly vitamin D if initially deficient – RCT March 2015

• Respiratory tract infection eliminated in 36 percent of people by 4000 IU of Vitamin D – RCT Sept 2015

• Acute respiratory tract infections prevented by vitamin D (even when ignoring the dose size – Meta-analysis Feb 2017

• Vitamin D reduces respiratory tract infections by 40 percent– meta-analysis Dec 2012

• Reduced viral respiratory tract infections by half by having more than 38 ng of vitamin D – June 2010 many people get > 38 ng with 50,000 every two weeks

Influenza

• Influenza prevented by 40 ng levels or treated with vitamin D hammer (50,000 IU) – June 2015 a single 50,000 IU dose

• Half the risk of Influenza -A in infants taking 1200 IU of vitamin D for 4 months – RCT Jan 2018

• Overview Influenza and vitamin D

Tuberculosis

• Tuberculosis 4.5X more likely if vitamin D less than 10 nanogram – meta-analysis May 2015

• Probability of getting TB reduced 60 percent with just 800 IU of vitamin D – RCT Aug 2012

• Tuberculosis risk decreased by 6 percent for each 1 ng increase in Vitamin D – Oct 2014

• Tuberculosis -100 percent cure rate with 10,000 IU of vitamin D daily – RCT 2006 which is about 50,000 every week

• Tuberculosis recovery speeded up by single 450,000 IU dose of vitamin D – RCT Jan 2017

Chronic Obstructive Pulmonary Disease

• COPD reduced by 40 percent with monthly 100,000 IU of vitamin D – RCT Jan 2015

• 100000 IU vitamin D monthly helps COPD patients – 3 RCT

Lupus

• Lupus flareups cut in half by just 2,000 IU of vitamin D – RCT Dec 2012

• Lupus flares totally eliminated by loading dose then 100000 IU of vitamin D each month – Oct 2012

• Musculoskeletal pain reduced with 4,000 IU of vitamin D – RCT April 2015 Lupus pain

• Lupus helped by Vitamin D supplementation in 3 out of 4 studies – Oct 2017

• Lupus is both prevented and treated by Vitamin D – review Dec 2017

Inflammatory Bowel Syndrome

• IBS quality of life improved by vitamin D (50,000 IU every two weeks) – RCT May 2016

Urinary Tract Infection

• UTI associated with low Vitamin D as well as treated - many studies 50,000 IU every 2 weeks should be very similar

• Urinary Tract Infection in infants 5.6 X MORE likely if low Vitamin D, 3.3 X LESS likely if supplement – July 2016

Multiple Sclerosis

• Multiple Sclerosis relapses cut in half by 100,000 IU of Vitamin D every 2 weeks– RCT 2019

PMS

• PMS again significantly reduced by 50,000 IU of vitamin D (This time, every two weeks) – RCT Oct 2019

• PMS in teens reduced 3X by 50,000 IU vitamin D weekly – Jan 2018

• PMS reduced by half in girls who had low levels of vitamin D – RCT Dec 2015

• Menstrual Pain (PMS) reduced by vitamin D – RCT 2012, 2014, 2016

  • Single dose of 300,000 IU of vitamin D

  • Women getting vitamin D needed NO pain relievers, vs 40% of the women without vitamin D

• PMS reduced by Vitamin D intervention - meta-analysis May 2019

Schizophrenia

• Schizophrenia reduced by biweekly 50,000 IU Vitamin D and probiotics – RCT Feb 2019

Endometriosis

• Endometriosis treated by Vitamin D (50,000 IU bi-weekly) – RCT Jan 2021

Smoking

• Smoking depression, etc. reduced by Vitamin D (bi-weekly, 50,000 IU) - RCT Dec 2021

  Note - Magnesium and Omega-3 supplementation often provide similar benefits for the above health problems

Taking one 50,000 IU capsule of Vitamin D3 every two weeks will result in 80% of adults
bringing their blood levels to above 40 nanograms/ milliliter in 2-6 months, an optimal level for good health.

You can take 50,000 IU pills daily in the first week and feel the benefits by the end of the week

    Feeling the benefits quickly greatly increases the likelihood that you will continue with supplementation

**||50,000 IU |To feel benefits in a week|To maintain >40 ng/ml
for 80% of people

Adult|1 per day| 1 every 2 W

Adult - #F00:* high risk |2 per day | 1 every week ||

✻About 20% of adults are at high risk for Vitamin D deficiency: especially those who are obese, pregnant, shut-in, avoid the sun, have dark skin, are elderly, live far from the equator, or need to deal with an illness, injury, or surgery. They need at least 2 times more Vitamin D .

A 50,000 IU capsule costs as little as 20 cents ($20 retail for a bottle of 100 capsules Amazon US )

The very lowest cost source and highest quality of vitamin D3 50,000 IU capsule = Bio-Tech

You can order it from Amazon US (Amazon has the lowest price, but has a policy to not ship any health care products out of a country)

    * UK company that ships Bio-Tech products to all the European countries

   WLS sells Bio-Tech from the Netherlands to Europe

Many companies on Amazon supply Vitamin D - Sept 2017

Can get 50,000 IU Vitamin D anywhere on the globe

**
Dose size	Suppliers
50,000 IU	18+ Feb 2024
10,000 IU	30+
5,000 IU	500+
4,000 IU Upper limit specified by IoM	20+	**

An adult who is not at high risk for vitamin D deficiency can achieve an optimal level with just 8 capsules of 50,000 IU

If at high risk: at least double the number of capsules will be needed for loading and maintenance

Bio-Tech Pharmacal

Bio-Tech makes the only Vitamin D that has ALL of these features:

Very low cost	50,000 IU capsule appears to be the lowest-cost source in the world
Contains no additives	Nothing to cause an allergy
Does not have oil base	Oil is associated with about 20% reduction in response in a clinical trial     water-dispersible is better and is not delayed by the Lymph System
Tasteless	No unpleasant taste or odor as with some liquids
Tiny capsule need not  be swallowed	You can put the capsule powder into the water, milk (animal or plant), juice, food, etc  and consume your vitamin D over the period of days.
Kosher and Halal certified	Vegi-cap (needed for Kosher) is more expensive
Gut friendly	Though some companies have even gut friendlier forms

Opinion: Founder of VitaminDWiki

95% of people will get full benefit from Bio-Tech Vitamin D

~50% of people will get full benefit from most of the other brands of vitamin D

    due to poor gut, allergies, unable to take pills, etc,

Alternately, take 4,000 IU daily (instead of 50,000 bi-weekly

    cost is 4X higher, and have 13 more opportunities to forget

Note: The Institute of Medicine says the upper limit is 4,000 IU (average per day)

**||4,000 IU |To feel benefits in a week|To maintain >40 ng/ml
80% of people

Adult|20 per day for 4 days| 1 per day

Adult - #F00:* high risk ** |40 per day for 4 days| 2 per day

Child|10 per day for 4 days|every other day||**

Additional companies that ship internationally include (Note: customs rarely seem concerned about dose size if small quantities, especially via mail)

Can get 50,000 IU Vitamin D anywhere on the globe 16 companies state weekly dosing as of Nov 2023

Swansons,     Life Extension Foundation     Vitaminshoppe     Nutrition Express - can sort by size or type     Ebay 35,000 listings in Jan 2024

Cofactors should be adjusted- especially if take for many months

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Reduce Calcium intake to 500 mg/day (dairy products, food, supplements)

Increase Magnesium supplements to 500 mg/day

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Additional Vitamin D references

• VitaminDWiki pages containing "50,000" in title 262 as of Aug 2024
  • Every 2 weeks 50,000 IU

• 50,000 IU of Vitamin D once every 2 weeks achieved 40 ng in 3 months – RCT March 2021

• Treating Vitamin D deficiency in senior women – such as 50,000 IU daily for 15 days then twice a month – Review April 2019

• 50,000 IU of vitamin D every two weeks – Jordan conclusion - RCT July 2017

• Vitamin D update – 40-60 ng ideal, 50K biweekly maintenance – Jan 2014

• Insulin resistance during pregnancy improved with 50,000 IU of vitamin D every 2 weeks – RCT April 2013

• Even taking as much as 4200 IU vitamin D 43 percent had less than 30 ng in blood – RCT Jan 2013 need more?

• Monthly vitamin D dosing is better than daily dosing for children and elderly (more likely to be taken) – June 2017

• Vitamin D RCT using 100,000 IU monthly for a variety of health problems – results of ViDA due in 2016{ANAME()}optimal{ANAME}

  What is an Optimal Level: 40 ng, 50 ng, 60 ng, 80 ng?

• Is 50 ng of vitamin D too high, just right, or not enough

• Optimum Vitamin D level: Evidence for 30 and 40 ng – Grant Aug 2013

• 30 to 50 ng of vitamin D is optimal – Central Europe consensus Sept 2013

• Defining normal level of vitamin D (need 4000-5000 IU) - Heaney Spring 2013

• 40 ng Vitamin D perhaps optimal for reduced mortality – Meta-analysis Jan 2012

• Fewer health problems with higher Vitamin D Levels has the following chart

Loading doses of Vitamin D

• Overview Loading of vitamin D

• 540000 IU before ICU raised vitamin D by 25 ng in 2 days – March 2011

  High Risk of having low vitamin D levels

• Obese, Seniors, Pregnant, Shut-in, Dark Skin, very far from the equator, recent surgery/major medical

  • avoid the sun, excessive clothing, gut problems, kidney/liver problems, etc.

• High Risk of little Vitamin D category overview with associated searches

• Obese need 2.5 IU of vitamin D per kg to increase 1 ng (about 3.4 X more) – RCT Sept 2013 example of a high-risk group

• 50,000 IU vitamin D weekly increased levels by 52 ng normally, but only 28 ng if obese – Oct 2013

  Extremely low Toxicity Note: 50,000 IU is not even toxic if taken daily for 30 days

• Millions of people have taken single dose of 500,000 IU of vitamin D without any problem

• 10,000 IU daily can be taken for years and years. (The body naturally removes any excess)

• Overview Toxicity of vitamin D

• Some indication that too much vitamin D causes problems in hospitals

• 100,000 IU monthly vs placebo RCT Aug 2018

  • adverse events in 16% of both Vitamin D and placebo groups: 10.1016/j.clnu.2018.07.034

  Use the same 50,000 IU pill monthly for children

• Children no longer get much vitamin D from milk - fortify at home

  Other Vitamin D information

• Does Less Sun mean More Disease video tells you WHY vitamin D is needed

• Overview Deficiency of vitamin D

• 258+ Randomized Clinical Trials with non-daily dosing

  • Note: very little difference if Vitamin D is taken every day or with 16 X a dose taken every 16 days

• Vitamin D deficiency is a major global public health problem – Maps Nov 2013

• Would you be opposed to my getting more vitamin D

  • How to ask your doctor if you should take more vitamin D

• Overview Rare Allergic reaction to vitamin D

  • Magnesium, wool, oil, etc. About 1 in 300 people, typically due to low level of Magnesium

• Vitamin D3 for Vegans - many studies Vegan D3 surprisingly does not cost much more

• Low Cost vitamin D - including liquid and bulk typically 5 cents per 5000 IU

• Overviews at VitaminDWiki

• Proof that Vitamin D Works 99 proofs as of Jan 2025

• Even taking as much as 4200 IU vitamin D 43 percent had less than 30 ng in blood – RCT Jan 2013

• 30 percent of vitamin D sold now has more than 2000 IU - Dec 2012 vs US govt says 600 IU is enough

• How you might double your response to vitamin D

• 85% achieved 20 ng with avg of 3300 IU of vitamin D - oral and injection Aug 2012

• Breastfeeding with daily or monthly doses of vitamin D virtually the same – RCT Dec 2013

• It is OK to miss getting your vitamin D supplement by even a week - just take it when you remember to do so.

• If you have gut problems or poor absorption , you should probably take Vitamin D3 in a more easily absorbable form such as BioMulsion gel

• Alternatives if not swallow pills or not absorb vitamin D

• If you just have a maintenance dosing without loading dose it will take 6-9 months to feel the benefits

• No need to test your vitamin D blood level - But, a test will confirm when you are getting enough Vitamin D

• Many different forms are available

• Oil-based Vitamin D3 has the worst bioavailability – April 2014

• There are many near-term benefits to be felt by having an optimum level of vitamin D

• There is a 4X variability in response between individuals

  • The dose sizes on this page may be two times higher or 2 times lower than what you need
• About 5% of the population should not supplement with vitamin D
  • generally because Vitamin D increases or decreases the effect of their medications ( Contra-indications )
  • When in a hospital, you must make them aware that you have a higher level of vitamin D than most of the population. Virtually all drug doses assume low levels of vitamin D, and high levels can increase/decrease potency by 3X. A Chemo dose, for example, might be decreased by 3X for people with optimal vitamin D, giving you much less trauma, but if not reduced, you might die.
  • Review of vitamin D interaction with drugs – Jan 2014

• Let your calendar remind you when to take your supplement - Not have to remember: Which SUNday is this?

• Healthy in Seven Days - Loading dose of Vitamin D – book 2014

  • Restocking vitamin D quickly gets you to a good level in less than a week instead of less than a year

• Vitamin D once every two weeks is OK, daily is nice but not required – Aug 2014

• Breastfeeding with daily or monthly doses of vitamin D virtually the same – RCT Dec 2013

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33 additional Health Problems fought when taking 50,000 IU Vitamin D weekly

**
ADHD	Attention-Deficit Hyperactivity Disorder treated by weekly 50,000 IU of vitamin D – RCT Nov 2018
Anxiety	General Anxiety Disorder treated by weekly Vitamin D (50,000 IU -Omega-3, Mg also help) – Sept 2019
Asthma	Asthma reduced by weekly 50,000 IU of vitamin D – RCT Aug 2014
Back Pain Chronic	Chronic Back Pain relieved by weekly 60,000 IU of vitamin D – Jan 2017
Breast Cancer	50,000 IU Vitamin D weekly was the most popular for Breast Cancer - May 2020
Colds	Childhood colds reduced 25 percent by weekly Vitamin D – RCT Jan 2019
Cardiovascular	50,000 IU of Vitamin D weekly for 6 months after cardiac failure helps – RCT May 2022
COPD	COPD fought by Vitamin D - many studies
Cognition	Senior cognition improved in 4 ways by Vitamin D (50,000 IU weekly for 8 weeks) – Sept 2023 Cognitive function of adult women improved in 3 months of 50,000 IU weekly Vitamin D – Jan 2019
COVID	Consensus: 60,000 IU of Vitamin D weekly for 2-6 months can fight COVID, etc, – India April 2022 COVID etc. prevented and treated with 50,000 IU Vitamin D capsules - July 2022
Depression (dup of 2 weeks)	Depression in adolescent girls reduced somewhat by 50,000 IU weekly for 9 weeks – July 2017 Yet another study confirms Depression is treated by weekly Vitamin D (50,000 IU)– RCT Dec 2019 Depression decreased after vitamin D (50,000 IU weekly to elderly in the case) – RCT Oct 2019 Depression in seniors greatly reduced by Vitamin D (50,000 IU weekly) – meta-analysis June 2023
Diabetes (dup of 2 weeks)	Diabetic nephropathy (Kidney) treated by 50,000 IU of vitamin D weekly – RCT Jan 2019 Diabetic inflammation reduced by Vitamin D (30,000 IU weekly) – RCT July 2020 Prediabetes reduced by weekly 60,000 IU of Vitamin D – RCT Jan 2021
Fibromyalgia	Fibromyalgia treated with Vitamin D (50,000 IU weekly for 3 months) – 2016, 2017, 2018, 2019 2023
Hashimoto's thyroiditis	Hashimoto's thyroiditis helped by weekly 50,000 IU of vitamin D – RCT May 2019
Hay Fever	Hay Fever treated by Vitamin D (50,000 IU weekly) – RCT July 2019
Hives	Hives treatment augmented by 60,000 IU Vitamin D weekly – RCT June 2015
Hypertension – pulmonary	Pulmonary hypertension reduced in some people with weekly 50,000 IU vitamin D for 3 months – 2016
Immune System	Immune systems helped by 50,000 IU of vitamin D (weekly for 3 months) – May 2021
Infant	Weekly Vitamin D to mother after birth much better than daily - RCT Aug 2018
IBS (dup of 2 weeks)	IBS diarrhea treated by weekly 50,000 IU of Vitamin D – RCT March 2020 Irritable Bowel Syndrome treated by weekly 50,000 IU Vitamin D – RCT Feb 2019 IBS reduced by 50,000 IU of Vitamin D (weekly or bi-weekly) – Meta-analysis July 2023
Kidney Disease	Hemodialysis patients (CKD) helped by weekly 50,000 IU of vitamin D – Jan 2017
Migraine	Migraine headaches reduced with 50,000 IU vitamin D weekly – RCT July 2015
Obesity	Obese lost more weight on diet if added 50,000 IU of vitamin D weekly – many RCTs
Multiple Sclerosis Relapse	No multiple sclerosis relapses during pregnancy if 50,000 IU of Vitamin D weekly – RCT April 2015 Multiple Sclerosis treated equally by UVB and weekly 50,000 IU of Vitamin D – RCT July 2023
Multiple Sclerosis Fatigue	Multiple Sclerosis fatigue reduced by weekly Vitamin D (50,000 IU) – June 2023
Muscles - women	Muscles improved in women with 50,000 IU vitamin D weekly (8 weeks) plus daily Magnesium – RCT Sept 2020 Muscle pain in obese women reduced by aerobic exercise plus 50,000 IU Vitamin D - RCT May 2021
Osteoarthritis – knee	Knee osteoarthritis treated with vitamin D, weekly 50,000 IU – May 2015
Pain (dup of 2 weeks)	7 improvements in lives of veterans with chronic pain with 50,000 IU vitamin D weekly – June 2012 Pain reduced by Vitamin D (60K weekly, then monthly) plus daily Calcium in 3 months – May 2021
PMS	PMS in teens reduced 3X by 50,000 IU vitamin D weekly – Jan 2018
Sleep Apnea	Mild Obstructive Sleep Apnea decreased by 50,000 IU weekly vitamin D – June 2021
Sports Performance	Athletes helped by weekly 50,000 IU Vitamin D – RCT Aug 2019 50,000 IU Vitamin D weekly provided enough benefit for combat sport athletes – March 2020
Stroke	Stroke patients getting weekly 50,000 IU Vitamin D did better – trial March 2021
Surgery	Weekly oral Vitamin D recommended before surgery (Bariatric in this case) – RCT June 2019
Tonsillitis	Chronic tonsillitis virtually eliminated in children by Vitamin D (50,000 IU weekly) – RCT May 2023
Ulcerative Colitis	Ulcerative Colitis inflammation treated by weekly vitamin D (40,000 IU) – July 2018
Ulcers – Venous	Venous ulcers healed 4X faster with weekly 50,000 IU vitamin D – RCT Oct 2012
UTI (dup of 2 weeks)	Urgency Urinary Incontinence in senior black women decreased 40 percent by weekly 50,000 IU vitamin D – RCT Dec 2018 Urinary Incontinence reduced by 50,000 IU of vitamin D weekly (details behind paywall) – RCT Feb 2023	**

See also

• Take 50,000 IU of Vitamin D weekly for 2-4 months, then get a test - Dec 2021

• Vitamin D supplementation guidelines (adults – 50,000 IU per week) – Feb 2017

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Health problems fought by 50,000 IU weekly: or bi-weekly

ADHD,  Anxiety,  Asthma,  Autism,  Back Pain,  BPH (prostate),  Cancer - Breast,  Cancer - Colon,  Cancer - Prostate,  Cardiovascular,  Chronic Obstructive Pulmonary Disease,  Cognitive Decline,  Colds,  COVID,  Depression,  Diabetes,  Endometriosis,  Falls,  Fibromyalgia,  Hashimoto's Thyroiditis,  Hay Fever,  Heart Failure,  Hives,  Hypertension – Pulmonary,  Immune System,  Infant,  Inflammatory Bowel Syndrome,  Influenza,  Kidney Disease,  Knee-Pain,  Lupus,  Migraine,  Multiple Sclerosis,  Muscles - women, Obesity,  Pain - Chronic,  Pain - Growing,  PMS,  Preeclampsia,  Premature Birth,  Respiratory Tract Infection,  Schizophrenia,  Sleep-Poor,  Sleep Apnea,  Smoking,  Sports Performance,  Stroke,  Surgery,  Tonsilitis,  Tuberculosis,  Ulcerative Colitis,  Ulcers – Venous,  Urinary Tract Infection   click here for proof

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50,000 IU of Vitamin D - many studies 160+

short URL = is.gd/vitdweek