D2 and D3 are two forms of vitamin D. A pack may call them ergocalciferol and cholecalciferol. If you avoid animal-derived ingredients, check the source on the label or ask the manufacturer.
Read the form and amount
Find the line for vitamin D. It may show the amount in micrograms or IU, short for international units. Check how many tablets, drops or capsules the stated amount applies to before comparing products.
Match a pack to the plan you were given
Take a photo of the front and the nutrition or medicine information to your pharmacist. Ask whether it matches the strength and schedule your doctor advised. You can also look at the Nutrigap nutrition label for an example of how D3 is listed on a multivitamin. See how to convert mg and mcg on a label. NIH vitamin D fact sheet
How to read a supplement label in India
Compare only matching amounts
One label may give an amount per capsule and another per drop or per serving. Copy the serving size beside the number before making a comparison. If the source matters to you, look for a source statement from the manufacturer. When you are following a plan from your doctor, bring the actual pack or two clear photos so the pharmacist can check the amount and form together.
If you are comparing Herbadose products
Start with the complete pack information.
Read the ingredients, directions and cautions. Product support can clarify pack and order details; ask your doctor or pharmacist about individual suitability.