B1 (Thiamine) 

Contributes to normal energy-yielding metabolism

Thiamine contributes to normal functioning of the nervous system

Thiamine contributes to normal psychological function

Thiamine contributes to the normal function of the heart.

B2 (Riboflavin) 

Contribution to normal energy-yielding metabolism

Maintenance of the normal functon of the nervous system

Maintenance of normal skin and mucous membranes

Maintenance of normal red blood cells

Maintenance of normal skin and mucous membranes

Maintenance of normal vision

Contribution to normal metabolism of iron

Protection of DNA, proteins and lipids from oxidative damage

Reduction of tiredness and fatigue

B3 

Contribution to normal psychological functions

Contribution to normal energy-yielding metabolism

Contributes to normal function of the nervous system

Contributes to maintenance of normal skin and mucous membranes

Contributes to reduction of tiredness and fatigue

B5

Contributes to normal energy-yielding metabolism

Contributes to normal mental performance

Contributes to normal synthesis and metabolism of steroid hormones, vitamin D and some neurotransmitters

Contributes to the reduction of tiredness and fatigue

B6

Vitamin B6 contributes to normal cysteine synthesis

Vitamin B6 contributes to normal energy-yielding metabolism

Vitamin B6 contributes to normal functioning of the nervous system

Vitamin B6 contributes to normal homocysteine metabolism

Vitamin B6 contributes to normal protein and glycogen metabolism

Vitamin B6 contributes to normal psychological function

Vitamin B6 contributes to normal red blood cell formation

Vitamin B6 contributes to the normal function of the immune system

Vitamin B6 contributes to the reduction of tiredness and fatigue

Vitamin B6 contributes to the regulation of hormonal activity