# About grams, MCG and MG.

I take prescription medication for my trigylycerides, and my doctor also recommended that I take Omega 3 fish oil. He said to take 2 to 4 GRAMS per day. The only measurements I can find on the bottle are listed as MG (1000). So, what’s a GRAM, an MG and a MCG, and how do I convert them to the one I want?

A milligram is 1/1000 of a gram. So, if one pill (I’m asuming it’s a pill) of fish oil is 1000 mg, then it is one gram. So 2 to 4 of those pills you get you the 2 to 4 grams a day you need.
MCG? Never heard of that measurement. What do you have in your medicine cabinet that lists itself in MCG?

MCG sounds like it is micrograms. To be written properly it needs a mu (greek letter). Usually the shorthand in ASCII is to write ug as the u looks like a mu without the tail.

So 1,000,000 ug (MCG)=1000 mg (MG)=1g (G). In SI, they should also be lowercase, but that’s another story.

And a gram is one thosandth of the weight of one liter of water (though it is not defined in those terms anymore. It is equal to 0.002204622622 lbs according to my calculators convertion function, or 1 lbs is approx 454 grams.

It’s a bottle of B-12, and the bottle reads ‘B-12’
1000 mcg

Are you saying that a Doctor advised you to take 2-4 grams of Vitamin B-12?

That sounds a massive dose. as the RDA listed for B-12 is only a few micro grams per day. (From this PDF file) 4 grams of B-12 is over a million times the RDA!!! I susspect the doctor meant take 2-4 grams of fish oil per day. Check back with doctor to be sure.

To get the “mu” character, hold the ALT key and then type 0181 while still holding the ALT key and you get µ
Here’s some other special characters: http://www.1728.com/altchar.htm

And here’s plenty of converters to use:
http://www.1728.com/indexcon.htm

bouv asked me where I got the mcg from and I said it was on a bottle of B-12. My original question was for fish oil. I needed the definition of gram, mg and mcg.

Well, mcg is often used in Prescription drugs as well as vitamins and such. Very rarely is a Mu symbol used. (regarding the mcg being a poor way to write it)

In case it isn’t clear yet, a mcg is 1/1000 of a mg. A mg is 1/1000 of a gram.

As a molecular biologist I deal in micrograms daily. We usually write it ug or with the mu symbol (the control-alt trick isn’t working for me). We never use mcg but I recognized what it was.

so re: the pill that is 1000 mcg, it works out to 1 mg.

Lagomorph
No it’s just the ALT key (not CTL and ALT)
Give it another try and your molecular biologist co-workers will be impressed.

Why type mcg when you can type µg ?

(I have heard on the SDMB that the ALT key characters work for some folks and not for others).

You have to use the number pad to get it to work, though.

I mistyped before, I wasn’t using the CTL key, just the ALT. But I was also not using the number keypad:

µ
voila

This also works for many people: [symbol]m[/symbol] results in [symbol]m[/symbol]