My main advice remains that you should primarily try to retrieve as many nutrients as possible from your daily food. In addition, you can take supplements. After all, it is impossible for supplements to contain all essential nutrients. The nutrients that you derive from your daily diet will not suffice to fully act as an effective preventative against cancer.  (This is not only related to the prevention of cancer, supplementing your diet is also necessary to prevent cardiovascular disorders or to optimize the ageing processes.)

I recommend the following nutrients as a preventative against cancer. It is important to know that these nutrients work in synergy (that is to say, the effect of one nutrient enhances the effect of the other; so, the combined effect is greater than the sum of their separate effects). Unless mentioned differently, the doses are per day.  

– A correctly dosed multivitamin mineral supplement as a base. (Upcelyn plus, Multi Protect, Optimal Preventive, see nutri4all.com). Note: opt for a supplement that doesn’t contain iron or copper, unless you’ve been diagnosed with deficiencies.

– Vitamin D3: 2000 IU or more (depending on the blood results; make sure that the vitamin D-level is higher than 40 nanogram per ml blood). Especially in the initial phase, vitamin D can slow down the development of cancer and reduce the mortality risks as a result.

– Iodine: 0.5 to 1 mg.

– Folic acid (in the form of methyl folate): 0.2 to 0.4 mg (alongside vitamin B12 and B6)

– Omega-3 fatty acids: 500 to 1000 mg EPA+DHA.

– Curcumin: 250-500 mg.

– Resveratrol (works in synergy with curcumin and quercetin in slowing down the growth of cancer cells; it occurs naturally in red wine, grapes, peanuts and dark chocolate). High doses are unnecessary:  50-100 mg.

– EGCG from green tea, minimal 300 mg.

– Broccoli-extract in the form of sulphoraphane glucosinolate (SGS): 25-50 mg.

– Pomegranate extract: 400 mg.

– Co-enzyme Q10: 50-100 mg.

– Melatonin: 3-10 mg (25 mg with chemotherapy).

– Vitamin C: minimal 500 mg a day.

– Quercetin is a flavonoid, present in red grapefruit and red onion among others. 400-800 mg.