How Vitamins are Classified? The Most Important Factors.

Classification of Vitamins

Free Online Lectures of Biochemistry for Medical, Dental and Allied Health Sciences by Biochemistry Club

Vitamins can be classified into two major groups:

  1. Fat soluble vitamins
  2. Water soluble vitamins

Fat Soluble Vitamins

  1. Vitamin A (Retinol, Beta carotene).
  2. Vitamin D (Cholecalciferol).
  3. Vitamin E (Tocopherols).
  4. Vitamin K (Phylloquinones, Menaquinones). 

Water Soluble VItamins

B-Complex Vitamins

The Most common question that is asked about the B-Complex Vitamins is that why they are classified as B-Complex separately among the water soluble vitamins.

Answer to that question is that all these vitamins act as Coenzymes in various metabolic pathways and their deficiency can causes severe problems.

Energy Releasing Vitamins

  • Thiamine (Vitamin B1)
  • Riboflavin (Vitamin B2)
  • Niacin (Vitamin B3)
  • Biotin
  • Pantothenic acid

Hematopoietic Vitamins

  • Folic acid
  • Cobalamin (Vitamin B12)


  • Pyridoxine (Vitamin B6)
  • Pyridoxal
  • Pyridoxamine

Non B-Complex Vitamins

  • Vitamin C (Ascorbic acid)

All these lectures are organized and listed in detail in their proper sections. To view these lessons please visit the Vitamins Section. This can be approached by directly clicking the Biochemistry I button or it can also be approached from the drop down menu in Biochemistry I tab. Once you reach the section click the curriculum tab to view the full list in the section.

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