<p>Yes, but not in any significant or noticeable amounts.  Caffeine is stable in solution for quite some time.  Considering a average cup of coffee (~100mg of caffeine), you may lose a few milligrams of caffeine over an extended rest period.  Given that caffeine content varies in any given cup of coffee (many sources list variations as wide as 60mg to 200mg, or more) you are unlikely to notice any difference in the caffeine content.  </p>

<p>What you may notice is a difference in the taste.  They are many suggestions out there on how to cold brew coffee.  It may be worth your time to research an alternate brewing method.</p>

CC BY-SA 3.0
2016-01-21T21:47:35.930Z
The caffeine that's lost - where does it go?
Robert
CC BY-SA 3.0
2016-01-21T17:39:35.063Z
2016-01-21T17:39:35.063Z
Suspended User
<p>Largest drops observed after a 24 hour period were 4.1% during this study: <a href="https://www.ncbi.nlm.nih.gov/pubmed/2500782" rel="nofollow">https://www.ncbi.nlm.nih.gov/pubmed/2500782</a></p>

CC BY-SA 3.0
2016-01-21T16:06:21.610Z
2016-01-21T16:06:21.610Z
user136102
<p>I prefer to drink coffee cold.  So, after the coffee is done brewing, I leave it to rest for some time and drink it later.</p>

<p>Will the coffee lose its strength, if it is cooling down?</p>

<caffeine><iced-coffee>
If I leave my brewed coffee to rest, will it lose caffeine?
Iter Ator
# If I leave my brewed coffee to rest, will it lose caffeine?

(Asked by: username_0 on 2016-01-21)

I prefer to drink coffee cold. So, after the coffee is done brewing, I leave it to rest for some time and drink it later.

Will the coffee lose its strength, if it is cooling down?

**Tags:** caffeine, iced-coffee


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## 2 answers

### Answer by username_1 on 2016-01-21. Score: 5 | Accepted answer

Yes, but not in any significant or noticeable amounts. Caffeine is stable in solution for quite some time. Considering a average cup of coffee (~100mg of caffeine), you may lose a few milligrams of caffeine over an extended rest period. Given that caffeine content varies in any given cup of coffee (many sources list variations as wide as 60mg to 200mg, or more) you are unlikely to notice any difference in the caffeine content.

What you may notice is a difference in the taste. They are many suggestions out there on how to cold brew coffee. It may be worth your time to research an alternate brewing method.

> **Comments:**
> **username_2**: The caffeine that's lost - where does it go?  

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### Answer by username_3 on 2016-01-21. Score: 3

Largest drops observed after a 24 hour period were 4.1% during this study: <https://www.ncbi.nlm.nih.gov/pubmed/2500782>


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