Does vitamin D help fight cancer aggression?

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Published 2023-11-20
Can vitamin D help fight diseases such as cancer?

Jonathan talks with Professor JoAnn Manson to try and find out.

Professor JoAnn Manson is a professor of epidemiology at the Harvard School of Public Health and one of the world's most cited researchers. She’s run multiple enormous studies, with over 20,000 participants, to uncover the real effects of vitamin supplementation on our health.
Dr. Sarah Berry is one of the world's leading experts on human nutrition. She has run more than 20 randomized clinical trials looking at how humans respond to different fats.

Watch the full episode here:    • The truth about vitamin supplements |...  

If you want to uncover the right foods for your body, head to joinZOE.com/podcast and get 10% off your personalized nutrition program.

All Comments (21)
  • @markparker5585
    I'm surprised about the fracture results. Did they test Vitamin D3 with K2 for the older people concerning fractures, or just the D3? There is far too much scaremongering amount toxic levels of Vit D from supplementation. It's very difficult to get toxic levels for the vast majority of the population, (you'd probably have to misplace a decimal point) and if you are at all worried, just get a blood test done, they are not expensive (in the UK at least). We get only 5 months of Sun at a high enough angle to produce Vit D in the skin here, and any reserves built up are depleted way before the remaining 7 months are over. Vitamin D has a half life of around 15 days, so it only takes a couple of months to be down to less than 10% of what you had at the end of Summer, so certainly by the middle of the Winter here, people are probably at their lowest levels of Vitamin D of the year, and are so for another 3-4 months. The effects of Winter colds/flu and SAD would all be reduced if 70% of the UK population weren't deficient over Winter.
  • To clarify, fish do not synthesize their own EPA and DHA. They consume marine algae that synthesize it. The EPA and DHA in the marine algae sourced supplements are the same chemical compounds found in fish oil. This is in contrast to the terrestrial plant sourced ALA. All of the benefits attributed to marine EPA and DHA are present in the supplements sourced from marine algae. The concern about fish oil is contamination with heavy metals and other pollutants that concentrate in fish. Algae sourced EPA and DHA have much lower risk of exposure to toxic pollutants.
  • @animalhouse7375
    Very disappointing. I will have to watch the full episode but so far I fail to see the need for caution. Vitamin D is very safe and while the jury is out it could do no harm at all for people to take it and more likely, a lot of good. The Professor even said that Vitamin D "is SO essential for health". Incidental sun exposure doesn't cut it. We don't get nearly enough sunny days in the UK to build up good levels.
  • Dr John Campbell was in my opinion dismissed on his advice on Vid D + K2. It was disingenuous on the "put down" by ZOE. John was too much a gentleman to argue back. Remember if it was not for John Zoe would not have the profile it currently enjoys... On a parting note ZOE is doing a good job 🕊
  • I am aware of medics reporting recent increase in cancer progression, possibly associated with spike protein in both covid virus and mRNA vaccine compromising T cell immune response - cancer severity related to vitamin D serum level. Vitamin D toxicity is rare, but deficiency is widespread among the population, particularly in the obese and dark-skinned cohorts. Vitamin D is fat soluble, works with K2 and magnesium to minimise soft tissue calcification.
  • @PC-vg8vn
    The question is - does the Dr take Vit D supplements given her knowledge of the research, and if so how much? And does she also take K2 to ensure the calcium goes to the bones and not arteries.
  • @nebbykoo
    I have MS. Vit D helps me sleep, and makes me feel a lot better. I don't know about the research. Anecdotes for the win!
  • @peterz53
    @4min on incidental sun exposure. I would say test, supplement, and repeat until you get dialed in. In my early 60s living in Florida and walking outside daily (5 miles plus) my D levels were a little under 30 ng/ml (US units which represents lowest end of ref, range). Sitting in the sun 10 15 minutes a day extra with most of my body exposed didn't make much of a difference, a few ng/ml which could have been data scatter. After multiple D3 supplement regimes (starting with 1,000 IU) and repeated testing, I settled on about 4,000 IU/d D3 to get my level up to low 40 ng/ml. So test, and base supplements on test results. I have been consistently in 40 to 50 ng/ml range now for years of taking 4,000 to 5,000 IU per day most days (plus Florida sun exposure). Keep in mind that evolutionarily, homo sapiens got a lot more sun exposure over hundreds of thousands of years than in the last century in the 1st world societies where we are basically indoor creatures.
  • I've been taking fish oil based Omega 3 daily for the last 17 years and 4000ius of Vit D3 daily for the last 4 years. And I will carry on taking them unless someone says 'stop'. Certainly my GP is happy with what I'm doing.
  • @ronaldevans425
    Clearly not a complete discussion on vitamin D however I did not get the impression the study included other things like K2 MK7 or magnesium that are needed to get some of the better outcomes. A bit like a study of use of cement for concrete without including proportion of sand or water or aggregate !! I do not think cement by itself is too effective. My own experience of osteoporosis diagnosed in 2009, did not want to take the drugs and focused on alkalizing my diet, Vitamin D of 4000iu, K2 Mk7 and magnesium. In 4 years was back to a normal reading on Dexa scan. Most people get plenty of calcium from diet but need the mechanism to get the calcium into the bones. K2 Mk7 is this carrier and vitamin D is the mechanism to get from tissues. Must have been some studies as my blood test ( the way to really find out your levels ) had a scale on the report. So some one must have created this set of levels for deficient, adequate etc. Sorry not impressed.
  • @peterdollins3610
    My prostate cancer appears to be in remission. (I'm 81.). Take VD & eat Salmon. But the main difference to my diet over the period of remission so far is adding to my lemon teas by sliced lemn with boiling water as my regular drink. No scientific evidence but i feel healthier and there is the remission. In particular I make a boiling lemon drink drink in the evening that have it next morning. Feels great but as said...... Disaponted there's not more on food. Cure my IBS by diet reduced my arthritis also by diet.
  • @albertgan9423
    Need good magnesium and K2 intake and Vit D to reduce fracture risk
  • @lindalaw5466
    Vitamin D helps with immunity , glad some research is being done. I wonder how big pharma can make money from this?
  • @Radarcb329
    This assessment is insanely insufficient since it seems to demand proof of efficacy of Vitamin D. When the first question should be whether vitamin D supplements cause negative health effects. What I have read is that there is little risk for 5000 iu a day. Then as to the efficacy, then there are so many random factors related to sun exposure and diet, how could this fool argue that we need to prove that D is needed for any individual. COVID is not unique and yet she admits the benefit. We give people the shot without determining whether the person has immunity, but that is a different case where too much vaccination can turn off the immune system. No such behavior has ever been shown for D.
  • @manjitdigital
    Hey JoAnn Really Informative video. Btw I was wondering if you need help with edit on your videos and also make highly engaging shorts out of them. Or Youtube management ?
  • Wow I am an older type 1 diabetic and do a lot of exercise suffer from knee pain my trainer after watching your show said to try vitamin D which I started a week ago. It worked for me no more knee pain.
  • @gudnikristinn
    I am a vegetarian in Norway and I take algea based DHA and EPA Omega 3 supplements. I thought this was readily available everywhere. I also get ALA Omega 3 from flaxseed oil and ground flaxseeds that I eat every week. I am surprised that preventing heart disease is the main benifit that has been observed. Considering that heart disease is lower in Vegetarians and almost non existent in Vegans, it would be cool to know if vegetarians are getting the same benifits, or if the main benefit is mostly in fixing the fat ratio for people eating saturated fats ever day