My understanding is the fiber of the whole fruit is important: it slows absorption of the sugar and adds bulk to aid digestion in general. Typically some or all

My understanding is the fiber of the whole fruit is important: it slows absorption of the sugar and adds bulk to aid digestion in general. Typically some or all of it is removed in juices and smoothies. I think of removing fiber as similar to adding sugar. fwiw, I eat a low-carb diet (up to ~90g of net carbs, so not strict keto). I often eat some fresh or from-frozen fruit: blackberries, raspberries, blueberries, strawberries, orange (half a navel or a whole mandarin), or a few apple slices. I never drink juice. I don't feel fruit gives me any nutrition I can't get elsewhere. I can get vitamin C for example from various vegetables including red peppers, cabbage, and dark leafy greens. I also take a multivitamin because it's hard to get enough of some nutrients (notably vitamin D) that fruit doesn't help with anyway.