simm...Kyolic is one but I use a garlic extract from the grocery store. I find it in the aisle with the spices. It is a lot cheaper in the grocery than the health food store.
The best (and cheapest) way is to take some REAL garlic, crush it, squeeze out some juice, and use that to soak your food in...
I keep some seaweed & brine shrimp soaked in fresh garlic + Kent Zoe Marine Vitamins in my fridge... feed small scoops of it daily... fish love it... they eat the little pieces of garlic as well!...