Beriberi is caused by a lack of vitamin B1, pellagra by a lack of vitamin B3, while pernicious anemia is due to a lack of vitamin B12. A lack of Vitamin B is simply called a Vitamin B Deficiency.
The deficiency of vitamin E is very rare. But still it may cause haemolytic anaemia.
Vitamin A
For humans, nothing. (It may well be a vitamin for rats.)
Without sufficient vitamin A, a person may experience night blindness, impaired immune function, and skin issues. Inadequate vitamin C can lead to scurvy, characterized by weakness, anemia, gum disease, and skin problems. Both vitamins are essential for overall health and wellbeing.
Sickness may be due to pathogen and not deficiency of vitamins.Each vitamin deficiency leads to specific symptoms.eg: night blindness due to lack of vitamin A and E,rickets due to lack of vitamin C etc. which is not sickness.
Improve The first symptom that you would notice in a person with a vitamin C deficiency is bleeding gums. Lack of vitamin C causes a disease known as scurvy, which if it is not treated by vitamin C will become fatal. People cannot live without vitamin C in their diet.
Vitamin K aids the formation of proteins for blood clotting.
Vitamin B
The main disease that lack of carrots can cause is blindness.
May be a disorder on the peripheric, micro-circulation, or may be something related to a neurological disorder, like excess of vitamin B6, or lack of vitamin B12. You can get help either of an angiologist or a neurologist.
scurvy, from vitamin C deficiency