Caffeine Isomers and Their Effects on the Nervous System

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Discussion Overview

The discussion revolves around the effects of different brands of espresso coffee on the nervous system, particularly focusing on the role of caffeine and its isomers. Participants explore the variability in caffeine content and its potential impact on physiological responses, as well as other compounds present in coffee that may influence its effects.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant observes that different espresso brands have varying effects on their nervous system, suggesting that caffeine isomers might be responsible for these differences.
  • Another participant counters that the differences in effects are likely due to varying caffeine concentrations in different coffee brands.
  • Some participants assert that there are no isomers of caffeine, clarifying that while other compounds may be isomers, they do not retain the properties of caffeine.
  • One participant highlights the significant variation in caffeine content across different coffee preparation methods, referencing an external source for caffeine content ranges.
  • Discussion includes the presence of other xanthine compounds in plants, noting their biomedical effects, and questioning whether caffeine is responsible for coffee's laxative effects.
  • Participants discuss the structural and stereoisomers of caffeine, with one emphasizing the complexity of isomer types and their implications.
  • Concerns are raised about the effectiveness of decaffeinated coffee, with participants noting that some brands may retain more caffeine than expected.

Areas of Agreement / Disagreement

Participants express differing views on the existence and relevance of caffeine isomers, with some asserting their non-existence while others suggest potential effects of varying caffeine concentrations. The discussion remains unresolved regarding the specific contributions of caffeine and other compounds in coffee to its physiological effects.

Contextual Notes

Participants mention the complexity of isomer types and the variability in caffeine content without reaching a consensus on the implications of these factors. There are also references to the gastrointestinal effects of coffee, but the mechanisms remain unclear.

Who May Find This Useful

This discussion may be of interest to individuals exploring the biochemical effects of caffeine, coffee enthusiasts, and those curious about the physiological impacts of different coffee brands and preparation methods.

Delta2
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I noticed that different brands of espresso coffee have different effect on my nervous system. Some are really good in the sense that they wake me up and make me feel fresh and dynamic, while others do nothing, and others make me really jumpy and nervous and stressed.

Why is that? I am not good in chemistry but is it because the caffeine molecule has many types of isomers? (structural and or stereoisomers) and each caffeine isomer affect my nervous system in a different way?
 
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I think it's more likely some have far more caffeine than others.
 
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No isomers of caffeine as far as I am aware.

(That is: there are other compounds that are isomers of caffeine, but they are no longer caffeine.)
 
Borek said:
No isomers of caffeine as far as I am aware.

(That is: there are other compounds that are isomers of caffeine, but they are no longer caffeine.)

Er hm what do you mean by that, that the isomers of caffeine are synthesized in chemical labs and not found in nature coffee plants?
 
jim mcnamara said:
You have the grade "A" answer there. - @CWatters answer.
https://www.caffeineinformer.com/caffeine-content/coffee-brewed - has a range of caffeine from 64mg -> 277mg per cup. See how coffee prep methods change the caffeine content.
I could never imagine there could be such a big variation in caffeine density depending on brand and how it is prepared..Up to 4x..or even more.
 
https://www.ncbi.nlm.nih.gov/pubmed/17514358 there are many xanthine compounds in plants. For example, mate (Holly plant in South America), tea (theine), and chocolate all contain caffiene and other xanthine relatives. Xanthines have a lot of biomedical effects - the xanthines in ordinary tea are bronchodilators.
 
Delta² said:
Er hm what do you mean by that, that the isomers of caffeine are synthesized in chemical labs and not found in nature coffee plants?

OK, too many shortcuts and hand waving in one post.

There are many types of isomers. Sometimes the molecule has the same overall formula, but is different structurally (structural isomers, often thousands of such, they are considered to be different compounds). Sometimes the molecule is very similar (same overall formula, almost identical structure), but differs only by subtle geometry (like stereoisomers). There are no stereoisomers of caffeine, there are plenty of structural isomers. Differences of a kind you have described are common for a stereoisometry.
 
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I only drink decafinated coffee and even that has some caffeine in it. With some brands it feels like they have hardly taken any out.
 
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CWatters said:
I only drink decafinated coffee and even that has some caffeine in it. With some brands it feels like they have hardly taken any out.
What other chemical compounds coffee has (except caffeine) that are useful for a human organism?

Something else I want to ask (don't laugh), I noticed coffee also acts as a sort of mild laxative (it helps me when I am constipated), is it caffeine to blame also for this laxative effect?
 
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Delta² said:
Something else I want to ask (don't laugh), I noticed coffee also acts as a sort of mild laxative (it helps me when I am constipated), is it caffeine to blame also for this laxative effect?

Quite normal, to quote wikipedia: Coffee and caffeine can affect gastrointestinal motility.

Caffeine is also mildly diuretic, although we easily develop tolerance.
 
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