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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 + Preeclampsia + Premature Birth + Falls + Cognitive Decline + Respiratory Tract Infection + Influenza + Tuberculosis + Chronic Obstructive Pulmonary Disease + Lupus + Inflammatory Bowel Syndrome + Urinary Tract Infection + Poor Sleep + Weight Loss + Growing Pain + Multiple Sclerosis + PMS + Schizophrenia   (25 problems)

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

17 additional, for a total of 42 health problems fought if take 50,000 IU weekly

Click HERE to see the scientific proof for each health problem


Heart Failure

Chronic Pain



Breast cancer

Colon Cancer

Prostate Cancer


Premature Birth


Cognitive Decline

Respiratory Tract Infection



Chronic Obstructive Pulmonary Disease


Inflammatory Bowel Syndrome

Urinary Tract Infection

Multiple Sclerosis



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 likelyhood that you will continue with supplementation

50,000 IU To feel benefits in a weekTo maintain >40 ng/ml
for 80% of people
Adult1 per day 1 every 2 W
Adult - 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

Dose sizeSuppliers
50,000 IU 8+
10,000 IU 30+
5,000 IU 500+
4,000 IU
Upper limit
specified by IoM

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

Status March 28, 2020 - they have stock of the D3-50,000 textVegicap
Bio-Tech makes the only Vitamin D which 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-soluble is far more absorbable
 Tasteless   No unpleasant taste or odor as with some liquids
 Tiny capsule need not
 be swallowed
  You can put the capsule powder
into 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 Vitamin D Life
> 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: Institute of Medicine says upper limit is 4,000 IU (average per day)

4,000 IU To feel benefits in a weekTo maintain >40 ng/ml
80% of people
Adult20 per day for 4 days 1 per day
Adult - high risk* 40 per day for 4 days 2 per day
Child10 per day for 4 daysevery other day

Additional companies which ship internationally include (Note: customs rarely seem concerned about dose size if small quantities, especially via mail)
Swansons,    Life Extension Foundation    Vitaminshoppe    Nutrition Express - can sort by size or type    Ebay 10,000 listings in Nov 2016

Cofactors should be adjusted- especially if take for many months

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

Additional Vitamin D references

Every 2 weeks 50,000 IU

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

Loading doses of Vitamin D

High Risk of being having low vitamin D levels

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

Use the same 50,000 IU pill monthly for chilgren

Other Vitamin D information

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

ADHDAttention-Deficit Hyperactivity Disorder treated by weekly 50,000 IU of vitamin D – RCT Nov 2018
Asthma Asthma reduced by weekly 50,000 IU of vitamin D – RCT Aug 2014
ColdsChildhood colds reduced 25 percent by weekly Vitamin D – RCT Jan 2019
(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 – RCT Dec 2019
Depression decreased after vitamin D (50,000 IU weekly to elderly in the case) – RCT Oct 2019
(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
Hashimoto's thyroiditis Hashimoto's thyroiditis helped by weekly 50,000 IU of vitamin D – RCT May 2019
Hay FeverHay 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 – pulmonaryPulmonary hypertension reduced in some people with weekly 50,000 IU vitamin D for 3 months – 2016
InfantWeekly 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
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
Multiple Sclerosis relapse No multiple sclerosis relapses during pregnancy if 50,000 IU of Vitamin D weekly – RCT April 2015
Osteoarthritis – knee Knee osteoarthritis treated with vitamin D, weekly 50,000 IU – May 2015
(dup of 2 weeks)
Chronic Back Pain relieved by weekly 60,000 IU of vitamin D – Jan 2017
7 improvements in lives of veterans with chronic pain with 50,000 IU vitamin D weekly – June 2012
Fibromyalgia treated with Vitamin D (50,000 IU weekly for 3 months) – 2016, 2017, 2018, 2019
PMS PMS in teens reduced 3X by 50,000 IU vitamin D weekly – Jan 2018
Sports PerformanceAthletes 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
SurgeryWeekly oral Vitamin D recommended before surgery (Bariatric in this case) – RCT June 2019
Ulcerative Colitis Ulcerative Colitis inflammation treated by weekly vitamin D (40,000 IU) – July 2018
Ulcers – Venous Venous ulcers healed 4X faster with weekly 50000 IU vitamin D – RCT Oct 2012
(dup of 2 weeks)
Urgency Urinary Incontinence in senior black women decreased 40 percent by weekly 50,000 IU vitamin D – RCT Dec 2018

See also

short URL = https://is.gd/VitD2weeks

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