AFAIK, all peanut butter is made with hydrogenated oil, i.e. synthetic Trans fat. Except for a few brands like Adams and Laura Scudder's. http://www.adamspeanutbutter.com/producthttp://www.laurascudderspeanutbutter.com/product
This is different from Trans Fat naturally found in beef, milk, butter, cheese, and yogurt, which is harmless.
Some researchers are speculating that this synthetic Trans fat maybe the culprit for increasing the risk of coronary heart disease, which has been historically erroneously blamed on Saturated Fats. Some countries like Denmark, and Switzerland has already banned all food products containing more than 2% synthetic Trans Fat, with many others planning to follow suit.
Ok, I have tried this product before, and I think Adam's is the brand which can be found selling in NTUC. Without hydrogenated oil, means that the oil is on top of the peanut paste and is seperate in the jar. It takes a bit of effort and patience to stir and mix the peanut paste and oil together evenly, before storing. I found that using a fork was easier. A bit of muscle power, and maybe 10 minutes of your precious time wasted on it. The novelty quickly wore off after one or two jars, and I opted to get their no-stir product which has minimal (<2%) synthetic Trans Fat for the convenience of not needing to mix it. Any product with less than 2% Trans Fat may list it as 0 Trans Fat.
I don't think this product will sell, as Singaporeans are not going to take the effort and 10 minutes of their precious time mixing this stuff up by hand with a fork.
That's all I have on that.