Coffee Without Caffeine | Greg Foot | Earth Science 

these videos are getting quieter and quieter, in 2 weeks we won't be able to hear anything

Audio on this was a bit low, Greg.

Brilliant video and presentation, very likeable character and easy to understand explanation. Thank you!

very good -without background noise !!! clear and detail excellent explanation,

I work in the only plant in the world that is currently doing critical CO2 decaffeination (in Texas). This process is remarkable but very expensive/complex to design and implement. Great video and drink on!

someone needs to boost the audio on these videos, i can't hear a thing at the start?

Love the vid! If you guys could turn up the audio I would appreciate it. With it all the way up It was still a little quiet from by little Bluetooth speaker

Love your presentation! I actually learned a lot

Very enlightening, thank you for sharing!

Why aren't we using the leftover caffeine to make extracaffeinated coffee? I would buy that.

Doesn't anyone watch the videos before posting? Audio is way low.

This was genuinely interesting. Great work.

You go boy!! That was well explained😊

I always love the videos with Greg. Such a good presenter. By the way, who is responsible for the "comments" within the videos? :)

I've always wondered this, too.

Great one this one, like the slightly longer ones

Interesting Video, thanks :) I switched to decaf 15+ years ago (probably the crazy benzine stuff!) Giving my age away 50+ now I had vivid dreams every night and although I slept, my sleep was very exciting! with many things for my brain to process (Speilberg could not match some of my dreams!) and I never slept properly for 20+ years until someone said: "Have you tried having decaf?" I slept like a log after about 3 to 4 days :) A full caff is still welcome occasionally (driving long distance), but it's not worth drinking it all the time. :)

So the question is how do a consumer know which way the beans were decaffeinated? Does the packet contain that information?

Great vid Greg - what's your favourite Nespresso compatible decaf pod? The various makers don't seem to make apparent which methodology they use ....

Good to know. I wonder if it's done the same with tea.

Another great video.... But another video with sound levels far too low. They always seem to be around half the volume of most other videos. I watch on my phone in a noisy enviroment and have a lot of trouble hearing

I think the real question is how do we get the coffee out of the caffine.

Nice👍👍

Any particular reason why you haven't drunk caffeine for the last year's Greg?

Some errors in here, small ones. Liquid Co2 is not Super Critical. Liquid co2 acts like a solvent. Co2 as a triple point and a critical point. The triple point is a specific temp and pressure where Co2 could be gas, liquid or solid. Depending on how it is controlled you can easily switch between the phases to manipulate each phases advantages. The critical point is where Gas/Liquid Co2 at the right temp and pressure exists at a state where it inherits the properties of both liquid and gas. At this Supercritical state it flows like gas but has the carrying capacity of a solvent like in its liquid state.

Coffee only drags me to the world of explosive diarrhea

audio is way too quiet compared to most other videos.

I have several decafs a day with sweetener. It's my placebo for a dessert:)

Audio levels are all over the place and mostly way too low.

You have had caffeinated coffee. Decaf still has caffeine in it dufus.

Interesting video, however dichloromethane (CH2Cl2) is a different substance to ethylene chloride (C2H4Cl2).

When he said I'll take you through the 4 methods I couldn't help but check how long the video is.

Life without this lovely brown bean water wouldn’t be the same. I’m glad decaf doesn’t give us cancer

I've been noticing this for a while now. How do you not notice the absurdly low volume in your video? I can't hear a thing on my phone speaker with just a fan in the room. Please rectify this. Viewer can reduce the volume if it high, but there is nothing he can do if it is low.

This videos are amazing, love them.

Some people are sensitive to the effects of coffee and some are not. I can have well over a litre of the stuff on a normal day and sleep fine afterwards and not even really feel a buzz ever.

You need to sort out the audio.....

If it's decaf it don't pick you up.

Why the added clock tick sound effect?

Get whole bean decaf where ever you can no matter the process.

Oh shietttt, FINALLY, THE RO... THE GREG HAS COME BACK... home.

The volume of the recording is too low.

I'm addicted to tea

*In my country we add Cardamom to Coffee for eliminate caffeine .We have been doing this for centuries*

5:01- 5:05 😂

👍

I was only aware of the carbon dioxide method. And from the way all sorts of solvents used , I think CO2 method is the cleanest

It's strange if dopamine indicates addiction, people also get a dopamine release when they, for example, visit the dentist worried they might get a filling. Are people addicted to going ot the dentist? No, dopamine is more complicated than simply the "addiction neurotransmitter" it's the "remember this" transmitter. It's what marks things as important, whether it's something you love and covet, or something you hate or dread.

Too me, decaf tastes nothing like regular coffee. To me it has a sour taste

audio too soft

Coffee gives me headaches

I can’t have anything with caffeine in it, it makes me so anxious and I feel wired and after that I have a massive comedown

7:20 wasn't all that before using Science?

It is a fine question indeed, to ask yourself how decaff-coffee is made. But a far more puzzling one is, Why?!

Just what we need: yet more processed food.

You really need to mute the click track in the left ear. Some odd noise on that channel in the music is like a wood block click over and over all video long.

Please adjust your mic gain on your future videos. I had my volume maxed out in youtube, PC, and speakers and I could still barely hear your audio.

Early in the video you ask "who can resist that alluring..." Well, I can, and it's actually not that difficult. The first step is that you have to find coffee disgusting, after that it takes care of itself. :)

Caffeine gives coffee its characteristic taste!

I'm a tea drinker myself. I only drink coffee when I want/need the stimulation. Decaff is utterly perverse to me.

Non-chemist civilian here. #3 sounded like the most straightforward possible process, in that it just filtered the caffeine away. Why not Game, Set, Match then? You have all the components of coffee except the caffeine, which was filtered. Why not just recombine the rest (old beans with GCE), and you end up with (starting coffee) = (filtered caffeine, off to the side) plus (everything else). Isn't "everything else", umm, "decaffeinated coffee?" Instead, there's this introduction of new beans and osmosis step - why? Even worse, why "over and over?" when it would seem that victory is already achieved, the filtering away of caffeine? Is is that difficult to recombine the GCE and the "old" beans? And if so, then why not just sell the GCE as decaffeinated coffee? Come to think of it, it seems that would be perfect. GCE is not only decaffeinated; it's also liberated from the flavorless, useless "old bean." It's like "extract of coffee." What do you need beans for anyway? Actually this filtering is what I and I suspect most other people thought was done: that somehow the caffeine is filtered, and the remainder is the sold product. Another problem, and which might expose a contradiction above: sprudge.com/green-coffee-extract-is-it-safe-we-have-answers-that-might-shock-you-28915.html says that GCE *contains* caffeine, possibly a lot. That is at odds with the video explanation. Moreover, one would think that a weight loss product (more typically stimulants) would be _caffeinated_ rather than _decaffeinated,_ right?

For next episode try explaning how they make the cherry on a cake. Ill promise you never eat them again.

So...water isn't a solvent? I mean, perhaps it isn't a selective caffeine solvent, but it sure seems to be acting as a solvent (something which dissolves other substances). Same question for CO2...

Dichloromethane is also called Methylene Chloride not Ethylene Chloride...

caffeine a big molecule. not compared to oils and tanins, it more the size of small sugars

thought someone was banging pots together outside, but it was you backgroundmusic

If the flavor is in that brown water why put it back in the beans? Why not just sell it as a decaf coffee concentrate and people can add it to water.

What kind of sacrilege is this?! Why not also strip out alcohol out of alcohol and cocaine out of coke while we're at it?

I drink decaf coffee and green tea

Say coffee one more time, I dare you, I do let dare you. Thanks for the informational video, was interesting.

Please increase your volume levels. My iPad volume is all the way up, and you only sound like a normal listening level. Edit: I see this has already been addressed.

Who is he wearing his watch

Dont drink coffee if you are sensitive to caffine...

I stopped drinking coffee in the 90's, didn't like how it treated my body

Time to fire the sound guy and hire one who can hear.

Mildly carcinogenic, sounds pleasant.

How about breeding and growing caffeine free coffee beans

avoided Decaf for ages because i thought it tasted shit... its not great but surprisingly better or same than most of the instant ones.

The question should be "WHY"

More to the point what is the penalty for taking caffeine out of coffee

Then why not bottle and sell this drinkable flavour, oil rich GCE solution as a replacement to coffee? Isnt this a brilliant shortcut?

Huh. I always assumed it was just GMO beans that didn't produce caffeine to begin with. The more you know, I guess.

whats the point ?

Not "how?", but "WHY?".

I drink decaf.

Eeeehhhhh? What’d you saaaay? 🧐

But sir, DCM isn't "ethylene chloride", it's "Methylene chloride" actually...

Benzene is also organic.

But the real question is WHY. WHY get the caffeine out of coffee? #deathbeforedecaf

Really nice video, but at 4:06 you have a small mistake - Dichloromethane is Methylene Chloride, not Ethylene Chloride.

Why people drink coffee free caffeine? I mean whats the joy in coffee if there is no caffeine ?

All the humanc Civilization used some forms of mood elevator . So there is nothing wrong in consuming as long as not harming us. Human interference makes everything harmful.minimal human interference are beneficial.

TLDR - Drink it!

After watching this I realized that decaf isn’t worth it

1:58 Caffeine is less than 10 angstroms long. Many other biological molecules are larger.

If you're sensitive to caffeine just drink the damn tea

Assuming you read this, please take the following as constructive criticism. Check your levels. The audio is quiet, I had to increase the volume on my tv which made the next video quite loud.

Or you could just drink tea.

drinking decaf coffee is a sign of weakness, and weakness disgusts me

“Instead of benzene, they used an organic solvent...” sigh