Does scanning groceries reduce the nutritional value of the food scanned?

The only claim I've seen of this kind is from a site that wants to
sell you a "Bioenergy Disk" for $25 (or a pocket-sized versiuon for
$11):

"Food exposed to price scanners, microwaves and other interruptive
forces affects vibrational patterns."

http://www.hannasherbshop.net/hpe_han_energy_t3.html

Here's info about the "Bioenergy Disk":

"MORE ABOUT Bioenergy Disk 
 
 DIRECTIONS:
Place sack of groceries on top of the device. Place water on it also.
For yourself, hold it over your solar plexus and the destructive wave
is counteracted in 1 minute.

 INGREDIENTS:
The Bio Energy Disk contains a master-inspired formula of magnets, emu
oil, sesame oil, fruit tree shavings, and colored light."

http://www.hannasherbshop.net/H0221.html

Make of this what you will, but I have seen no evidence whatsoever
that magnets, emu oil, sesame oil, fruit tree shavings, and colored
light will restore nutritional value to food, nor that the use of a
grocery scanner, which simply passes a beam of laser light across a
food item, strips food of its nutrients.

Grocery food scanners put out red light at perhaps 630-670nm. 
Intensity is not high enough to chemically alter anything.

Don't worry about such things.  You can eat dog food and live to be
85.