How to use Ddrops?

Ddrops™ 1000 IU liquid vitamin D is recommended for adults. It is specially designed as an alternative for those who do not like taking their supplements in a pill-form. How to use the Ddrops™:

• Administer one drop daily, or as directed by your healthcare practitioner.
• Turn the bottle completely upside down. There is no need to shake the bottle, as the drop will fall out by itself. To slow the speed of the drop, the bottle can be tilted slightly from vertical.
• In a few seconds, a drop will fall from the hole in the top of the bottle. One drop may be put on food or taken from a clean surface such as a spoon or the back of the back of the hand.
• Ddrops™ products, including Ddrops™ 1000 are designed to be dropped onto a clean surface, then licked off the clean surface rather than dropped directly into the mouth. This allows the eurodropper to not come in contact with the person (keeping it free of contamination). This method also allows easy monitoring of the number of drops dispensed from the dropper prior to the person taking in the product
• Return the bottle to upright position, put on cap.
• Store bottle upright, between 10°C and 30°C.

What is the source of the vitamin D?