He has changed my outlook and well-being.

Professor Holick is awesome, he makes the subject easy to understand and listen to. Just wish this message was getting out there more, as it has such implications to human health.

Dr Holick is awesome, both his knowledge and his presentation skills. His book "The Vitamin D Solution" is an excellent reference. People with any condition should look into adding a daily dose of 4,000 - 5,000IU per day to their vitamin regime. Remember that most agricultural soil is depleted of vitamins and minerals, and most food is now irradiated, so you need to take supplements. Some food is lacking in as much as 90% vitamin potency compared to 30 years ago.

This presentation is incredible, I just had to come back and watch it again. I love the way he just BOMBARDS you with facts and relevant information; even going as far as to address counter claims with counter evidence. This is something I can listen to and watch without feeling like I have to shout at the screen- "Come on! Speak faster, say something of substance".

I asked my doctor if they test for vit D he said not they charge to do that thes becuase eveyone is 95percent deficient. they know this and don't try to correct it a still tell the lie tha sunlight is bad for you.

looking forward to seeing a new vitamin D chanel here !

Always great to see the Presentations, so much Input with studies and facts in a short time , puh !

Dear PZ, Dr. Holick stated that cancer fighting starts at 60ng/ml, over 100 is observed in normal healthy people that get sun, 200 is toxic to no one, the only known toxic reaction in journal was 1,000,000 IU/day, 500+ in the blood, the chemical reaction is two way and self-limiting, that 5000 IU are metabolized daily... I am sharing my personal facts & observations in an effort to help others save themselves from D deficiency, which I know from direct experience can be serious and devastating.

True Humanitarian! This guy is a real Superhero!

Excellent presentation, Dr P neurologist

one of his best, addressing the studies and the discrepancies, and you can see his frustrations with the bs....good questions in q&a, they should give more substantial time for that,.....

I tanned for one winter in a tanning bed 5 min every day,. That winter I did not get sick ONCE, next winter skipped tanning...never had been more chronically sick in my life. That winter I got two types of flues and multiple sinus infections.

He says that cod does not have vitamin D, but its the Cod-liver that has all the vit-D.

23:46 - 24:07 crucial information that virtually noone knows

Thanks!

my paranoid gene says sun exposure like coconut consumption and iodine consumption would be so health causing it would cut too far into pharmaceutical profits

That’s scary that in London you can’t make vit D from October through April

Fantastic Info Be-safe folks No More Wars

I take 8000 IU/day all year to reach a measured 77 ng/ml blood serum 25-hydroxy D. 8000 IU/day is, therefore, not enough.

A brilliant man

We just don't seem to know anything. My physician told me than the numbness in my fingers could be due to my intake of vitamin D or magnesium, it was from weight lifting lol

"Supermilk' will probably make you super sick.

Ive read vit D is essential for serotonin

Man... From "Sugar is Toxic" to this, I'm starting to be VERY skeptical of all health science in America.

Michael is a bad ass.

What happened to the Copenhagen video? Please put that one back up.

I have been using one in my den for nearly a year. So far no adverse effects. It is right over my head during the winter about 1.5 m away. Compared with the sun, these bulbs put out low levels of UVB, so I am not expecting serious issues.

Do you recommend taking Calcium Carbonate or a Magnesium supplement too to help your intake for Vitamin D deficient? I had my gall bladder removed, my BMI is a bit higher than 30, and since then have barely any cholesterol good or bad, lower calcium, lower B12, lower iron, and vitamin d of 19.5 (April 2016) the last time with taking 1,000 IU 3-4 x / week for 6 months. My last showed 25 in Sep 2015. I do have very fair skin and live in the Midwest. I'm not sure how long I have been deficient in vit D, but I never had these other issues. (March 2015 I tested 20 and brought my levels to only 25 in Sept 2015 up getting sun at least 1x per day during 10am-3pm and taking a 1,000 IU every other day). I wanted to have a magnesium and calcium panel done separate, since if I cannot absorb these or good fats, I cannot absorb enough vitamin D no matter the amount I took. I do not have high bp or glucose. i changed to a plant based diet this past year and also take B12 dis solvable tablets and a vegan prenatal vitamin (even though I am not pregnant). I forgot to mention, I did not present stones and it took docs 4 year to diagnose my gallbladder issues. It was functioning at 17% when taken out. Also, I still have a hiatal hernia, acid reflux , and bile reflux. I stopped taking PPI's and try to do a natural approach, like eating plant based, not over eating, cutting out alcohol, soda, dairy, meat, other triggering foods. Sleeping on a angle when necessary and not going to bed on a full stomach. I have extreme fatigue, weak muscles, nerve / muscle pain everyday, headaches , depression, problems sleeping. Please help! -Laura

what are your thoughts on d3 called lichen, made from fungai ???? i heard it is lat better then sheeps wool

Can anyone tell me wheather the reptasun lamps can be used by people to produce vitamin d? is it safe if used with a timer?

Correlation does not equal causation

The best presentation by far!!! I suspected my symptoms of joint and muscle pain could be improved by taking decent supplements as I won't take medications but pain killer as and when. I have ordered my vit D3 with K2...I wish I understood the importance of vit D sooner, as I may have avoided this past year with health scares!!!

2011- australia 1 in 4 vitamin Deficient . More than 40% of Aussies are victim D deficient- this wouldn’t surprise me - I asked an ignorant arrogant gp to test my daughters vitamin D / he looked at her snd said , no we don’t test that . she doesn’t look like she needs one and said to my daughter in such a derogatory tone “ if you think you need vitamin D take some “. Damn fool I realised later he was seeing her fake tanned proof she don’t need vitamin D… never went back to him . And yes we found out later she was deficient

the "more at:" is a bogus web address on October 25, 2016

By what measure are you saying 77 ng/ml is not enough? Holick in this lecture says that 40 ng/ml is sufficient and his own measurement is 50 ng.

if you eradicated cancer people on average would only live three years longer

75mk/liyer minimum then?

my beginning level was 8 and my current level is 35 if I want to keep my optimum level 55 how many iu should I take forever please help anyone???

The moment this man said morning sun is dangerous should be a sign that this man may not know what he’s talking about. Then he said to not measure the active form. There is ideology here, sound like a religion.

blasted, pick a gd unit, nano mole/liter or nano grams/mL. They're both metric, pick one einsteins. Now when I get tested I have to research for hours to make sure the units are correct, frick!

E, ele

cocaine.