Nearly 40 renowned international scientists are currently emphasizing the importance of vitamin D, a vitamin that is essential for the prevention of many diseases and that almost all of us lack.

Dr. David Servan-Schreiber joins them in drawing the attention of the medical community to this deficiency and also in calling on the health authorities of European countries to address this issue. Indeed, it seems that . This situation with serious consequences for health is maintained by the authorities of the so-called developed countries since they are the ones who decide on the recommended daily intake and that currently the recommended intake is much too low for all vitamins and minerals.

Whether in France, Belgium, Switzerland or Canada, the diagnosis is the same everywhere: our populations are cruelly lacking in vitamin D, particularly from October to April. In France alone, winter vitamin D deficiency affects 75% of the population. Since the beginning of the 2000s and even more so in the last 2 years, in most French-speaking countries the official health authorities have reduced the daily intake of vitamin D and other vitamins and minerals as well.

Currently, European laws recommend a maximum daily intake of 7.5 µg of vitamin D, which is equivalent to 300 IU. However, according to various scientific studies, the physiological and sufficient needs to ensure a good prevention would vary between 1000 and 3000 IU according to the age of the person.

The blood vitamin D level can be easily measured from the calciferol in the serum. The absolute minimum established by most analytical laboratories is 20 ng/mL or (50 nmol/L). However, ideally, 30 ng/mL (or 75 nmol/L) should be approached at all times in order to best regulate all physiological parameters that depend on vitamin D.

Scientists estimate that the body uses 5000 IU of vitamin D3 per day and that in order to maintain calcifiedol levels above 30 ng/mL, it would be necessary to ingest a minimum of 1000 IU of vitamin D3 per day. Studies abound in this direction since protection against breast cancer, for example, is observed at levels above 52 ng/ml, and the same is true for preventing cardiovascular disease.

To reach such a level, people living in the northern hemisphere should consume 2000 IU of vitamin D per day in winter, and from March-April onwards, expose themselves to about 15 minutes of mid-day sunlight per day. This daily "sunshine" time would be equivalent to an oral intake of 3000 IU of vitamin D3.

If prevention is desired from a bone perspective, a calcifiedol concentration greater than 30 ng/mL (75 nmol/L) should be maintained. The estimates of all these researchers converge and thus confirm that the physiological needs in vitamin D would be 4 to 10 times higher than those currently authorized by the European health authorities.

The idea that an excess of more than 1000 IU per day of vitamin D could be toxic is still very present, but you will have understood that it is a belief consciously induced by all official public health organizations.

In fact, it is stated in several scientific reports that signs of toxicity have been observed in some adults from 10,000 IU and up to 50,000 IU of vitamin D per day, and again these conclusions were drawn from studies in which the patient was given doses of 100,000 and 150,000 IU of vitamin D per day. The safety and toxicity doses were established from the threshold value of 10,000 IU per day divided by 10, but the threshold value of 100,000 IU should have been divided, so the safety limit dose would have been stopped at 10,000 IU per day. In any case and whatever the reference taken into account or the studies retained by the authorities, the current European RDI (recommended daily intake) of 300 IU is absolutely insufficient.

The conclusion is, since in our latitudes, the wavelength of solar radiation from autumn to spring is too low to allow sufficient synthesis of vitamin D a vitamin supplement is essential for good health and maintenance.