“Produce” sounds like “pro-deuce,” and a pun is:
 
“Fruits and vegetables prevent constipation. That’s why they call it pro-deuce.”
 
“Deuce” means “number two” (defecation). “Fruits and vegetables can help keep you regular. Pro-deuce! #PoopJoke” was posted on Twitter on May 1, 2013. “TIL that fruits and vegetables can help prevent constipation. I guess that’s why they call it pro-deuce” was posted on Reddit—Puns on September 4, 2017.
 
“What do you call a particularly shitty vegetable? Pro-deuce” was posted on Reddit—Jokes on July 28, 2018. “Eating more fresh vegetables makes you an expert pooper. It’s right in the name. Pro deuce” was posted on Reddit—3amjokes on February 28, 2021.
   
     
Wikipedia: Produce
Produce is a generalized term for many farm-produced crops, including fruits and vegetables (grains, oats, etc. are also sometimes considered produce). More specifically, the term produce often implies that the products are fresh and generally in the same state as where and when they were harvested.
 
In supermarkets, the term is also used to refer to the section of the store where fruit and vegetables are kept.
       
Twitter 
Myq & Zach’s Twofers‏
@Twoferocious
Fruits and vegetables in favor of the number “two” = Pro-deuce produce.
10:28 AM - 6 Jan 2011
   
Twitter
Justin Nottingham‏
@JNOTTY
Fruits and vegetables can help keep you regular. Pro-deuce! #PoopJoke
9:39 AM - 1 May 2013
 
Reddit—Jokes
Posted by u/Castamundo January 19, 2016
Which grocery department is great for digestion and your “constitution”?
Pro-deuce.
     
Twitter
Wade‏
@TheWadest
Did you know: Fruit and vegetables are packed with fiber and that’s why they call it “pro-deuce.”
9:30 PM - 11 Apr 2016
 
Twitter
sophie hirsh‏
@maynotbecool
fruit and vegetables help you poop, so you could say produce is pro-deuce
9:23 AM - 9 Jun 2017
   
Reddit—Puns
Posted by u/friedchocolate September 4, 2017
TIL that fruits and vegetables can help prevent constipation
I guess that’s why they call it pro-deuce.
     
Reddit—Jokes
Posted by u/frogpolice July 28, 2018
What do you call a particularly shitty vegetable?
Pro-deuce
 
Reddit—Dadjokes
Posted by u/PangwinAndTertle January 27, 2020
If you work at a grocery store and you pooped on company time
You took a pro-deuce
 
Reddit—Jokes
Posted by u/Jaser84 April 2, 2020
When I eat a lot of veggies I tend to poop a lot…
Guess that’s why they call it pro-deuce.
 
Reddit—3amjokes
Posted by u/JoeFas February 28, 2021
Eating more fresh vegetables makes you an expert pooper. It’s right in the name.
Pro deuce