[Milvaedd_]

I don't think I've seen this suspected correlation receive a lot of credit. A lot of deadly health issues are not correlated to your nutriments intake. Cancer for exemple, thyroid issues, and many others. You would need to take lifestyle into account to even start assessing how multivitamins could potentially increase life expectancy.

Take two groups of people who live active lifestyles in non polluted areas, who don't smoke and don't have any other health issues (including mental health issues because a lot of them are correlated with a shortened lifetime). Give placebos for one of these groups.

This study would help a bit, but would be impossible : we don't have enough people who live this lifestyle and are available for long testings on multivitamins. They may also change their lifestyle, get into an accident, develop mental health issues, travel...Which would poison the results.

I think no one should take multivitamins expecting to live longer. Take them for the other proven benefits - they counteract deficiencies, that's all. My blood tests already show this, I take a blood test before an Iron Supplementation Cure and after, the benefit is clearly visible on the test.