My macbook pro is using all its RAM

Can anyone help me to reduce the amount or RAM that is being used by my mac? It's a 4Gb RAM model and the activity monitor almost constantly shows that there is 3.99Gb RAM in use.
Thanks

Yes.
In General 3rd Party AV Software and Cleaning Utilities tend to cause More Issues than they claim to fix...
They are Not Required..
jssaren wrote:
I think Ill just increase the RAM to 8Gb and see how it runs. Not sure if my mac can handle two 8Gb cards to make it 16.
You can use these Links to check which RAM is suitable for your Mac...
http://eshop.macsales.com/shop/apple/memory/
http://www.crucial.com
Macs can be very Fussy about RAM...
It is Important to get the Correct and Matching RAM
Those sites also have videos on how to Install RAM should you need it...

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