How Rain Can Carry Vitamin B12 to the Ground
Vitamin B12 is made by certain microorganisms, including some bacteria. If B12-producing bacteria are suspended in the air, a raindrop can encounter them as it forms or falls. The drop may collect the microbes—or tiny particles containing them—and carry a trace of their vitamin toward the ground.
From Airborne Microbe to Raindrop
Rain forms when water vapor condenses around microscopic particles in clouds. As droplets grow and move through the atmosphere, they can collide with other particles, including biological material such as bacteria. A drop that picks up B12-producing microbes can therefore transport them downward, much as a passing vehicle carries its passengers.
That does not mean every raindrop contains B12, or that the vitamin is necessarily dissolved in the water. It may be associated with the microorganisms themselves. The amount carried is tiny, and the vitamin’s presence says little about the rain’s overall cleanliness: droplets can also collect unwanted microbes and pollutants.
A Trace, Not a Nutritional Source
The striking part is the route: a vitamin made by microbes can move through the air and reach the ground with falling water. But rain is not a meaningful or safe way to obtain B12. Its contribution is minuscule, variable, and mixed with whatever else the water has picked up. A raindrop can be a delivery vehicle for microscopic life without being a useful dose of anything.
