Is canned or jarred minced garlic substantially different from fresh garlic?

Yes, it is different. Does it matter? It depends.

If you're going to use garlic in a stew or anything else that would 'dissolve' the regular garlic anyway, it doesn't really matter all that much in my opinion.

If you want to preserve the texture and/or create a more 'urgent' garlic flavour in short-cooked food, I'd go with fresh.

Sidenote: most of the prepared garlic comes with additives, consider if you want to have those as a part of your diet.

As for keeping time once opened: no worries really - bacteria really don't like garlic all that much, so refrigerated you should have no problems hitting 6+ months.

I think the main reason pre-prepared garlic exists is that some people don't like working with raw garlic directly i.e. getting their fingers/hands smelly.

You can't go wrong with raw garlic and it's easy to keep and prepare.

I think fresh garlic is much more flavorful! I tried the jarred garlic before, and I could definitely taste a difference. Yes, it's more convenient, but it's not as strong as fresh. A hand grater is useful when using fresh garlic. You won't have to chop and it helps prevent biting into larger pieces.

The other benefit to choosing fresh garlic is that you can remove it.

Sometimes, particularly for a saute or other pan-cooked dish, I want the flavor of garlic, but I don't necessarily want to bite in to it. I'll cut the garlic into thick slices, or just smash it and throw it in whole, with the intention of removing it before serving.

In my experience, fresh garlic is great for when you want texture, or to slow down the flavour infusion. For example, when baking potato chunks, I put fresh garlic in, and then the flavour doesn't take over the entire dish.

For other times, especially recipes that call for minced garlic, I have a jar of frozen crushed garlic that I bought at my local grocery. I'm not sure what's available where in the world, but in my area, the frozen garlic is cheap and has no additives in it at all.

Generally, one heaped teaspoon of frozen crushed garlic is equivalent to an average garlic clove.

On the other hand, for those times when you do want fresh garlic, a few drops of lemon juice on your hands afterwards and a quick rub will get the garlic smell off your fingers.

Production line, people! I’m Italian and we use garlic! So once a month I buy garlic bulbs, cut off the big ends, split the bulb to peel and drop them all into a nut chopper to speed-mince. Then I place 2-3t into a jello-shot container, snap on lid, place several into ziplock sandwich bag. Then I place as many of these bags as I think I may use in a week into a freezer proof gal.ziploc, date it and pitch into deep freezer basket-InstaMincedGarlic!!

I believe one cannot taste the difference between minced(canned) and fresh garlic once it is cooked. Especially if it's been stewed for hours in a slow cooker) So if I want a lot of garlic in my stew, I use minced one and save time!

You can always buy fresh garlic, then chop it up yourself and freeze it in a plastic bag. Then when you need it, just take out one teaspoon or so for each clove you need and store the rest.

I think some jarred garlic tends to have sort of a "sour" taste and doesn't have that delectable garlic sensation that gives garlic its reputation.

I've used both. I do use the jarred for those who don't like the fresh sliced one. They don't know the difference. I personally like fresh sliced garlic in everything. Think of it this way, people do not like onions, so I use onion flakes. I like the flavor of BOTH!

if you are going to use it where the garlic is cooked and disolved into a sauce, not that much differenT. If you are using a lot of it and it will remain largely whole, Go fresh (particularily if it is on pizza or something). I can taste the difference. Jarred garlic has a really off taste. Like it has gone slightly bad. It is a bad comparison, but I always think of the smell of a sewer when a pizza place uses it as their garlic.