Converting the units on desiccated liver tablets

A desiccated liver tablet listed as 3000 mcg contains the same amount as one listed as 3 mg, because a microgram is one thousandth of a milligram. That's the entire arithmetic, and it's where most comparison mistakes happen. The number looks dramatically bigger on the microgram label, and the two figures describe exactly the same serving.

Desiccated liver is dried liver, ground into powder and pressed into tablets or packed into capsules, usually from beef or lamb. The drying step removes water and concentrates whatever was in the tissue, which is why the weights on the label look large for a food product.

The confusing part isn't the arithmetic. It's that the same bottle can print 2 different units, one for the vitamin line and one for the mineral line, and both are correct.

Moving between mg and mcg on a desiccated liver label

The conversion runs one way and it's simple. 1 mg equals 1000 mcg. So a 500 mg tablet is 500,000 mcg. If you're holding a bottle of 3000 mcg capsules and a bottle of 3 mg capsules, you're looking at a 1 to 1 match, and neither is stronger.

Labels pick their unit to suit the nutrient they're emphasising. Vitamin B12 and folate are naturally tiny in the body, so they get printed in mcg. Iron and protein come in larger amounts, so they show up in mg. On the same bottle you might see vitamin B12 at 2.4 mcg sitting right under iron at 6 mg, and reading those side by side without converting is how people draw the wrong conclusion.

Older labels add a third unit. IU describes biological activity rather than weight, so it doesn't convert by a fixed factor the way mg and mcg do. For vitamin A you'd multiply IU by 0.3 to get mcg, and for vitamin D you'd divide by 40. If a bottle lists IU for something you're comparing against a microgram figure, do the conversion rather than eyeballing it.

Comparing a liver tablet against another product

Convert everything to the same unit first, then look at the serving size. A 3000 mcg capsule taken twice daily delivers 6000 mcg, which is 6 mg. A 500 mg tablet taken once daily delivers 500 mg. Those aren't close, and the unit they were printed in had nothing to do with the gap.

Then check what the milligram figure is actually measuring. Whole desiccated liver at 500 mg is a weight of dried tissue, not 500 mg of any single nutrient. That's a different kind of number entirely, and comparing it against a concentrated B12 tablet is apples to oranges.

The practical rule I use: write both figures down, convert to mg, then compare per serving rather than per capsule. It takes 2 minutes and it stops you buying the same thing twice.

One extra trap. Serving size and capsule count aren't the same thing, and a bottle saying 500 mg per capsule with a serving size of 2 capsules is really a 1000 mg product. Read the serving line, not the capsule line.

Where the comparison runs out

Unit conversion tells you the weights are equal. It doesn't tell you the two products do the same job, because a whole food powder and an isolated vitamin are built differently. A 3000 mcg B12 capsule and 6 mg of B12 inside a liver tablet are the same weight, and that's all you've established.

The label is a starting point, not the verdict. If the arithmetic is clean and the products still seem mismatched, that's a cue to look at the form, not the number.