# How could 45 milligrams of a substance equal 4,500 micrograms? [closed]

In this book, the author repeatedly states that 45 milligrams of vitamin K2 equals 4,500 micrograms. I thought 1 mg = 1000 mcg. How could this be?

• It's a typo. 1 mg = 1,000 mcg. – MattDMo Aug 23 '15 at 14:06
• – anongoodnurse Aug 23 '15 at 14:52
• I'm voting to close this question as off-topic because it is a trivial question. – AliceD Aug 25 '15 at 2:42
• @AliceD, It's only trivial if you have a certain amount of experience. With vitamins and "nutraceuticals", I've seen errors caused by conflating and mislabeling between "mg", "mcg", and "Mg" (where "Mg" was perversely meant to be convey micrograms!) . This is so serious that the FDA has repeatedly warned about it – Brock Adams Aug 25 '15 at 7:52
• @BrockAdams - you may be right, but then again I doubt this is the right forum for these matters. – AliceD Aug 25 '15 at 13:01

This is a typo. In the text he states:

... only 0.120 milligrams (120 micrograms) of MK-4 ...

So, he knows the correct conversion.

Then:

... the "same" product is almost 40 times more potent in one country ...

40 times 120 micrograms is 4800 micrograms -- which is close to 4500.

So, that suggests that the (4,500 micrograms) in the table is correct and that the 45 milligrams is a typo.

It should read 4.5 milligrams.