Highly bioavailable form Optimal dosage for greater synergistical effects 

Normal functioning of the nervous system
Vitamins Bl, B2, B3, B6, B12 and biotin
Counteract fatigue, support a normal function of the immune system
Vitamins B2, B6, B12, pantothenic acid, folic acid can
Normal homocysteine metabolism 
Choline, folic acid, vitamin B12
Choline is necessary for making acetylcholine, a neurotransmitter involved in healthy muscle, heart and memory performance, and also for the synthesis of phosphatidylcholine (aka lecithin) which is required for the composition of cell membranes. Choline is needed to carry cholesterol from the liver. A choline deficiency could result in excess fat and cholesterol buildup.