Hi Everyone. My husband is following the ‘Tier One Repurposed Drug’ protocols in Dr Marik’s Cancer Care book and has had his Vit D levels tested. I will pop the photo of his results in this post. My question is: how do these results translate into the recommendations in the book 'aiming for a 25-OH level of at least 55-90 ng/dl? For us, it’s a bit like converting celcius to fahrenheit, or km to miles, but we can’t work out how to do it!
Hi coelix. Thanks for the question. Great question. This is what I found
"To understand the relationship between vitamin D measurements in the USA and Australia, it’s important to clarify the units and conversion factors used:
Measurement Units
In the USA, vitamin D levels are typically measured in nanograms per milliliter (ng/ml), while in Australia and most other countries, the measurement is in nanomoles per liter (nmol/L)
Conversion Factor
To convert between these units, we use a multiplication factor of approximately 2.5:
* *To convert ng/ml to nmol/L: multiply by 2.5*
* *To convert nmol/L to ng/ml: divide by 2.5*
Comparison of Levels
The USA measurement of 55-90 ng/ml would be equivalent to approximately 137.5-225 nmol/L in Australian units. Let’s break this down:
* *55 ng/ml × 2.5 = 137.5 nmol/L*
* *90 ng/ml × 2.5 = 225 nmol/L*
The Australian measurement of 235 nmol/L would be equivalent to about 94 ng/ml in USA units (235 ÷ 2.5 = 94)."
Hope this helps. And of course, if anyone else reading this has more or better info, please feel free to jump in with your thoughts.
Thanks so much for replying, and for the extensive information and explanation! My husband’s doctor said that his levels were way too high and to ‘lay off it’ (Vit D) for three months. After reading the Cancer Care book, we now understand how important these levels are, and wanted to make an informed decision about what his future intake of Vit D3K2 should be.
I do have a follow up question - is a level above the 90 ng/dl safe? As my husband’s was slightly over, is this dangerous? I guess I am asking - can your levels get dangerously high and compromise your health?
Thanks, Coelix.
Hi Coelix, I looked a little further into the Cancer Care and on pg 79 there’s this info:
So 94 ng/ml looks a little over the target 55-90 ng/ml, but not anything near the 150 suggested to stop growth and metastasis for certain types of cancer. And certainly below the Hypercalcemia levels exceeding 250 ng/mL.
That’s what I’ve found. I’m not medically trained, so this is just info, and not medical advice, i.e. I’m not qualified to say if it’s safe or not safe, just providing data, but the info is there in the shiny new Cancer Care 2nd Edition, which (everyone reading :)) can be downloaded here.
We’ve a bunch of vitamin D info on our website here as well. All good stuff.
Anyone else have any thougts? Please feel free to drop them in here.
Thanks so much for this information, I obviously missed all this. We are now doing a deeper dive into this website and are very thankful for the resources and support FLCCC and all its contributors provide for people worldwide.Thank you. Much appreciated.
you’re very welcome. And thank you for your question. Everyone wins, with a little more, self empowering knowledge. Name of the game. 
I appreciate this thread and will add my experience. I recently got my Vit D levels checked (US measure ng/ml) and it came in high at 156. The lab said above 150 was a toxic level. Doing a lot of research online, there was very little info on what happens or what level is actually toxic. The issue, as stated above, seems to be hypercalcemia. I had only been taking 5,000 units a day so was concerned because everywhere I looked it said that levels would only get too high if you took very high doses for many months. (I do have some slight compromise in kidney function which is where vit D is processed apparently.) My new PCP said she has seen people with high levels even at doses as modest as 5,000 units a day so she suggests backing off to 3 days a week. I completely stopped supplementing for a month and it only dropped to 142. My main point is that we each seem to process vitamin D a bit differently. Although most people have levels that are too low for good health and some people require very high levels of supplementation, one can’t really know without checking.
Have worked with ~ 15 people whose D3 sat levels have been over 100.
Most of them were EXTREMELY healthy. For example, during covid, I recommended 20k IU/day D3 and 40mg/day Zinc for all family members over 40yrs, as preventative. My father (never trusting his son) ‘played it safe’ by taking 40k IU daily… for 2 years.
When he was 83 he contracted covid. His entire convalescence was one day, where he stayed indoors, didn’t ride his horse, and didn’t split firewood (his daily habit). His D3 sats (taken by his PCP the next month) was at 114ng/ml… Of course she was highly bothered by the levels. I just recommended he drop back to 10k IU/day going forward.
Conversely, almost every single cancer patient I interact with has very low D3 - generally sub-20.
That’s not proof… but it is a correlation… and worth considering.