The short answer
If you want the nutrients liver is unusually rich in, buy liver. If you want coverage across several organs in one bottle, buy a blend and accept that each organ contributes less per capsule. The dose per organ is roughly inversely proportional to how many organs are in the formula, because the capsule does not get bigger.
Neither is wrong. They answer different questions, and the labels rarely say which question they are answering.
What is actually in desiccated liver
Desiccated liver is beef liver that has been freeze dried or low heat dried and milled. The process removes water, which concentrates everything that was in the tissue, and the result is a powder with an unusually dense nutrient profile.
Liver is the storage organ for vitamin A as retinol, for several B vitamins including B12 and riboflavin, for folate, for heme iron, and for copper. It is also where the animal stores retinol in amounts that do not appear in muscle meat at any comparable level, which is the reason liver has a reputation and also the reason the dose matters.
Two practical consequences follow. Retinol is fat soluble and accumulates, so there is an upper limit, and it is not a nutrient to dose casually. Copper is also stored in liver, and zinc and copper compete, so a long term high dose liver habit is not neutral if you are also supplementing zinc.
What a blend changes
A five organ blend puts liver, heart, kidney, spleen, and pancreas into the same capsule. If a capsule holds 500 mg, each organ contributes roughly 100 mg, minus whatever the formula allocates unevenly.
So a blend gives you a fifth of the liver of a single organ product at the same capsule weight. If the reason you are here is vitamin A or B12, that arithmetic goes the wrong way. If the reason is that you want the general pattern of nutrients found in organ meats, a fifth of five organs is closer to what you actually meant.
Manufacturers sometimes allocate unevenly, weighting liver heavier because it is the organ people are shopping for. A label that discloses per organ amounts lets you check. A label that gives one total under a proprietary heading does not.
The traditional use argument
The case for blends is ancestral rather than reductionist. People eating a whole animal would have eaten liver, heart, kidney, and the rest, not a single organ in isolation, and each organ has a different storage profile. Heart is rich in CoQ10 and carnitine because that is what cardiac muscle uses. Kidney carries DAO enzyme, which is why kidney appears in histamine formulas. Spleen is high in heme iron.
If your mental model is "eat like the animal was eaten," the blend matches it better. If your model is "I was told my B12 is low," the single organ matches it better.
What to check on the label
Grass fed and pasture raised is the sourcing claim that gets printed most often, and it is worth something, because the nutrient profile of the tissue reflects the diet of the animal. It is not a regulated term for supplements, so it is a claim to weigh alongside the rest of the label rather than a certification.
Look for the per serving weight in grams, not just the number of capsules. A 3000 mg serving of liver is a real dose. A 500 mg serving of a five organ blend is a taste of each.
Look for whether the product is defatted. Some liver products remove part of the fat, which lowers the fat soluble vitamin content and changes what you are buying, and that is sometimes a deliberate choice for people watching retinol intake.
Our grass fed beef liver is a single organ capsule, and the beef liver gummies deliver the same single organ in a gummy for people who will not swallow six capsules. The organ blend capsules cover multiple organs, and the beef kidney gummies are the single organ pick for the DAO angle.
Where the upper limit actually bites
Vitamin A as preformed retinol has a tolerable upper intake level of 3000 micrograms per day for adults, and liver is one of the very few foods that can approach it. A concentrated desiccated liver dose plus a multivitamin containing retinol plus a cod liver oil can add up faster than people expect.
If you are pregnant, this is not a category to experiment in. Retinol in excess during pregnancy is teratogenic, and the standard advice is to avoid high dose liver products entirely.
Copper is the quieter one. Liver is high in copper, and long term high copper intake alongside low zinc is the pattern associated with an imbalance. It takes months, not days, and it is worth knowing if you are also taking a zinc carnosine product daily.
How to choose
Ask what you are trying to get. If the answer names a nutrient, buy the single organ that stores it. If the answer is "the general pattern of organ meats," buy the blend. If you honestly do not know, start with the single organ, because it is the easier one to evaluate, and you can tell within a couple of months whether anything changed.
The beef liver shelf has both types with the serving weights on the labels, so you can do the per gram comparison directly.
Is desiccated liver as good as eating liver
For the nutrients in question, it is comparable per gram of dry weight, and it is far easier to take consistently. Cooking destroys some of the thiamine and some of the folate, which the drying process at low heat preserves better, so the comparison is not obviously in favor of the cooked version.
Why do some products say defatted
Removing fat lowers the fat soluble vitamin content, including retinol. Manufacturers do it to make the product lower in retinol and more shelf stable. It is a different product, not a worse one, and the label should say so.
Can I take a blend and a single organ together
You can, and the thing to watch is the total retinol and copper. Add the servings up, check whether you are also getting vitamin A from a multivitamin, and keep the combination under the adult upper limit.
How many capsules a day is normal
It depends entirely on the gram weight per serving. Read the serving in grams, compare it to the 3000 mg or so that single organ products often use, and do not compare capsule counts between brands, because capsule size varies.