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Deficiencies of vitamins B12, D3, and K2 (MK-7) are common and
and related to longevity, but deficiencies of other vitamins are rare.
Although there are conditions when other vitamins are necessary but in the context of modern nutrition, it is unlikely that this need will be relevant. So, vitamin C is needed by seafarers who do not have fresh fruits or vegetables, and scurvy can begin.
Scurvy is a disease caused by an acute lack of vitamin C, which leads to a violation of the synthesis of collagen and eventually to death.
www.ncbi.nlm.nih.gov/pubmed/21402244.
But if the diet has at least a little fruit and vegetables, it is unlikely that there will be a deficiency of vitamin C. There is no evidence that supplementation with vitamin C can reduce the risk of death if there is no deficiency.
www.ncbi.nlm.nih.gov/pubmed/23437244
www.ncbi.nlm.nih.gov/pubmed/22419320
Beri-Beri disease (vitamin B1 deficiency) is rare in modern society since sufficient amounts of this vitamin are supplied with food. Beri-Beri is found in people in Southeast Asia who eat mainly white rice. But do you eat only rice?
Vitamin A deficiency and the associated higher risk of death occurs in children under 5 years of age.
www.ncbi.nlm.nih.gov/pubmed/21868478
www.ncbi.nlm.nih.gov/pubmed/18207566.
But there is no evidence for adults. And even for children preventive vitamin A supplementation has no evidence of effectiveness in reducing mortality
www.ncbi.nlm.nih.gov/pubmed/27681486
www.ncbi.nlm.nih.gov/pubmed/28234402, but only when the deficit is already diagnosed.
Vitamin E deficiency is rare
[www.ncbi.nlm.nih.gov/pubmed/25077263
Moreover, dietary supplements of vitamin A or vitamin E used in the absence of deficiency may increase the risk of mortality in adults
www.ncbi.nlm.nih.gov/pubmed/22419320
The use of high doses of vitamin E ((≥400 IU/day) during the year was associated with an increase in all-cause mortality www.ncbi.nlm.nih.gov/pubmed/15537682
Vitamin B7 deficiency is rare
https://ods.od.nih.gov/factsheets/Biotin-HealthProfessional,
In the US and Australia, there are no norms for the consumption of this vitamin.
https://archive.org/details/dridieta...e0000unse_h8m6
https://web.archive.org/web/20170121003340/
https://www.nhmrc.gov.au/_files_nhmr...nopses/n35.pdf
A deficiency can occur if you consume a large amount of raw egg protein daily for several months, which contains avidin, which blocks the absorption of vitamin B7.
https://www.nap.edu/read/6015/chapter/13
The deficiency of this vitamin is rare even in developing countries. For example, only a few cases were reported in the United States between 1952 and 1953
https://books.google.ru/books?id=og-...AJ&redir_esc=y
Vitamin B5 deficiency is also extremely rare
https://lpi.oregonstate.edu/mic/vitamins/pantothenic-acid
https://ods.od.nih.gov/factsheets/Pa...thProfessional
In general, deficiencies of various B vitamins are observed in alcoholism. You will be convinced that modern vegetables and fruits are poor in vitamins. But vegetables and fruits have never been the main source of vitamins, with the exception of vitamin C, which is more in animal food, but it is mostly destroyed during heat treatment.
The main source of vitamins is animal food. It is enough to remember how vitamins K, B12, and D were discovered. And for curiosity, we suggest that you study the content of vitamins in food.
And you will see that in meat and in the liver, the level of most vitamins in grams is tens or hundreds of times higher than in vegetable food.
There is also no evidence that various vitamin complexes taken for prevention could prolong life. So well-known brands of complexes of various vitamins that were given to rodents prophylactically did not prolong their life
http://link.springer.com/article/10....357-013-9609-9
And in an 11-year randomized, blind, placebo-controlled study involving 14,641 people aged 50 and older, there was no evidence that complex of vitamins and macronutrients could reduce the risk of mortality and major cardiovascular events
www.ncbi.nlm.nih.gov/pubmed/23117775
Multivitamins
Millions of postmenopausal women use multivitamins, often believing that they prevent chronic diseases such as cancer and heart disease.
And experts at the Fred Hutchinson Сancer Research Center decided to test the feasibility of this.
After 8 years of follow-up involving 161,808 patients, no association was found between the use of multi-vitamin complexes and a reduced risk of cancer, cardiovascular disease, or the risk of mortality.
www.ncbi.nlm.nih.gov/pubmed/19204221
Such multi-vitamins are only needed for therapeutic purposes, such as when planning a child, during pregnancy, and during feeding. But it is unlikely to have anything to do with longevity.