Researchers have found that the enzyme polyphenol oxidase (PPO) in certain fruits like bananas can reduce the absorption of heart-healthy flavanols, especially when combined with flavanol-rich ingredients like berries. The study suggests choosing ingredients with low PPO activity, such as pineapple or oranges, when making smoothies to optimize flavanol absorption.
But has this research also factored in that I probably won’t drink the smoothie unless there is a banana in there?
Reject science return to monke.
i’m gonna go out on a limb and wager that this is an utterly insignificant effect compared to how healthy it is to eat fruits.
Like obviously people have been healthy while consuming banana smoothies, you’re probably going to suffer more from stressing out about minute stuff like this than any possible negative health effects consuming it could bring…
Yeah. I feel like somebody read enough to come up with a clickbait article but not enough to learn anything.
Sort of like when sci-fi writers have a very surface understanding of something, but it’s forgivable because they’re sort of close and it’s good for the story. Except here it’s just an article nobody really needed.
The thing they are missing is that I don’t drink smoothies because they’re healthy, I drink them because they taste good
It’s what I have to remind people when they are trying to change their diet to get in shape and lose weight.
I tell them, your not eating for enjoyment, your eating to fuel your body.
I was very fit, but I was eating like canned tuna and Greek yogurt, not mixed but one after another. That’s not a delicious lunch, but it was just the nutrition that was needed.
your not eating for enjoyment, your eating to fuel your body
Yeah? Well, you know, that’s just like uh, your opinion, man.
This article assumes I am drinking smoothies purely for the flavanoids.
I drink 'em for the flava. Not the noids.
Avoid the Noid
I mean, the #1 reason is because it makes it taste like banana.
Handful of strawberries. Handful of blueberries. Half cup of pineapple juice. Cup of crushed ice. 1 whole banana. Blended well.
Super smooth dairy free smoothie and all you taste is the other fruit.
Ugh can’t even come to lemmy to escape real life - spent most of Monday morning denaturing/counteracting PPO in my uni food science lab!
Polyphenol oxidase is the enzyme responsible for browning in shit like apples and potatoes when cut and exposed to air.
I haven’t read the study linked in the OP yet (and I’m far too sad and intoxicated for it right now) but in other fruits/vegetables it’s pretty easy to deactivate PPO through application of some combination of Vitamin C (converts quinones back to their phenol form and reacts with oxygen before it can get to the PPO) and heat (which actually denatures the PPO enzymes).
When we were denaturing PPO in potatoes in a lab setting we simply blanched the sliced potatoes in 90°C water for 5 minutes before placing it in an ice bath until cool.
Right? Insert a little bit of lemon juice and the polyphenol oxidase shouldn’t be a problem anymore. Also, banana wouldn’t be the only problem (concerning high polyphenol oxidase activity), would it? Cut up an apple and it turns brown before you can push all pieces into a juicer. Literally, I’ve had a couple R&D projects at the juice company I used to work for and we had this small Angel Juicer and by the time all apple pieces were in, the juice was brown (provided I didn’t spritz in lemon juice at the beginning).
Submerging apple slices in water with a bit of salt prevents browning. Doesn’t change the flavour like lemon as not much salt needed.
Hey, I know I’m like two days late to reply, but you probably wouldn’t need the salt even. The polyphenoloxidase reaction is what the name suggests, an oxidation. So it requires plenty of oxygen to run, which probably is inaccessible in water, I would assume.
I actually wasn’t quite sure anymore if I had that right and when googling it, I managed to find an entire diploma thesis on the polyphenoloxidase reaction, so for anyone that’s interested in it more deeply (sorry, it’s in German aside for the abstract, which is in English, too), have fun c:
My experience is from preparing sliced apples to eat later. Dip them in slightly salted water for less than a minute and they’ll hold for quite some time. No need to carry water in the container. The salt must help create an insulation membrane against oxidation. This is all practical experience and I haven’t seen research on it.
So basically, just add a bit of lemon juice to your smoothie?
I’m not confident saying for sure without reading the actual paper - it really depends on how PPO interacts with the flavanols, but at the end of the day denaturing the PPO with heat should make it a non-issue. Keep in mind though that bananas are far from the only smoothie ingredient with PPO!
