Vitamin supplements, in general, are not necessary and as the article points out - in excess can be dangerous.
The vitamins that the article cites as a problem when taken in supplement form include E, folic acid and beta-carotene. This has been known for some time. The key here is to get these vitamins from food and avoid supplements unless a doctor notes a deficiency.
But note three vitamins missing from the article ... vitamin D, k2, and C.
We do not get enough vitamin D from food. Nature intended for us to manufacture our own vitamin D (as Cholecalciferol, vitamin D3) from the sun. Vitamin D is vital for immune support - especially Nk and T-cells which fight cancer and disease (such as flu and colds). Vitamin D is vital for skin and bone health. I take enough vitamin D (as a D3 supplement) to get my level above 50 - preferably around 70 ng/ml. Noon, clear sky sun exposure at 30 degrees N. latitude will provide 10,000 IU's of vitamin D3 equivalent in 30 minutes. Most of us do not have the time of day to do that. So I take a supplement. Last week when I was in the Bahamas, I took no vitamin D3. And I wore no sunscreen.
Vitamin K2 is also produced by our bodies in the gut by bacteria associated with fermented (i.e. decaying) food. No doubt our ancestors, like our dogs and cats, ate stuff that was not refrigerated or cooked and found in not so pleasant places. In other words, we ate what the land produced and much of that "food" had a ton of bacteria in it. Bacteria in our gut processes food in a way that produces copious amounts of vitamin K2. Vitamin K2 is vital for arterial and bone health. It prevents osteoporosis in women (when there is enough vitamin D around) and arterial calcification in men (when enough D is around). Vitamin K2 is best obtained from fermented foods today such as Natto, Gouda and other hard cheeses. I do take a supplement (menaquinone MK-7 also known as K2) when I am away from Natto. 300 mcg is needed for arterial health. And for blood disorders (http://www.mdsbeacon...k-mds-patients/), vitamin D3 plus k2 are a powerful combo. Unless you are out in the sun a lot and eat decaying food - you need to supplement.
Vitamin C is a strong anti-oxidant and is generally not needed in supplement form. If you eat plenty of citrus and veggies, in general, you are getting plenty of vitamin C. I do take a supplement (1 gram) per day when I don't have citrus around to take.
Magnesium is not a vitamin and not mentioned in the article. But magnesium is vital for heartbeat health as well as used with vitamin D to do what vitamin D does. In other words, higher levels of vitamin D (either by sunshine or supplement) use up your magnesium faster. Low magnesium can lead to sleep problems and heart beat irregularities (tachycardia). Almonds, nuts as well as your fruit and veggies provide Magnesium. The problem is that our soil is depleted in this mineral due to over farming of the land (http://www.ancient-m...ources/dietary/). Again - our ancestors did not have access to Industrial scale farms so they had plenty of magnesium. We don't. So I supplement Magnesium (relatively recently I started). I take 400 mg of Magnesium Taurate per day on average. I sleep much better once I started this.
Diagnosed 11 May 2011 (100% FiSH, 155% PCR)
with b2a2 BCR-ABL fusion transcript coding for the 210kDa BCR-ABL protein
Sprycel: 20 mg per day - taken at lights out with Quercetin and/or Magnesium Taurate
6-8 grams Curcumin C3 complex.
2015 PCR: < 0.01% (M.D. Anderson scale)
2016 PCR: < 0.01% (M.D. Anderson scale)
March 2017 PCR: 0.01% (M.D. Anderson scale)
June 2017 PCR: "undetected"
September 2017 PCR: "undetected"
). Could you send me a link? Also, what kind of vitamin D suppliment and how much is best absorbed by the body? I have no idea what my level was at dx, but it was prob. zero since I live in the land of eternal winter. 
