vitamin D
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.)
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.
All the vitamins are necessary for human health, and if you are not getting enough of any particular vitamin, there is a disease that will result. Lack of vitamin C causes scurvy, lack of vitamin B causes beri-beri, lack of vitamin D causes rickets, lack of vitamin A harms vision and in extreme cases causes blindness. Vitamin E is not as critical, but a deficiency of it will still have a harmful effect on health.
Can cause eye problems such as a lack of night vision,tiredness and skin problemsvitamin A , just like any other vitamin it have no calories or in more nerdy way it cant provide enough ATP (basic unit or currency of energy in our body) BUT it is reffered to as vital for life because it is involved in countless biochemical reactions (as enzyme or cofactor or essential component ) which provide ATP and execute many functions .vitamin a deficiency would most severely affect eye sight (night blindness) hair nails skin metabolic rate etc