DHA is an omega-3 fatty acid that's critical for your brain. You mostly get it from fish, and you could get it from sea vegetables if you eat a lot of those. If you're vegan you're definitely not getting it from fish, and probably not getting enough from sea vegetables, unless you're the type that carries around bottles of spirulina tablets in your backpack and eat insane amounts of sushi. So a DHA supplement is a good idea if you're vegan.
Two people can eat the exact same foods in the same amounts and exercise the same amount of time for a year and still have different weights when they're finished. I'm sure you've observed this phenomenon in your own life, but it still begs the question: why?! How can some people pack away pasta and potatoes all day and not seem to gain a pound (lucky bastards!), while others watch it go straight to their waistline? You can apply this example to all sorts of foods: meat, dairy, some vegetables, wheat, etc...the list goes on and on. Here's a brief primer on how your genes modify different foods you commonly eat, and what it can mean for your health.
A curious fact about mother nature is that she typically uses chaos as a means to create order. This is true with regards to your body, and especially true with regards to our most important organs: the brain and heart. We might think of them as being deliberate and steadfast, but here's an unsettling fact: their movements are entirely random.
Flour is the biggest source of calories in the world. It's cheap, it tastes great in dishes, and it lasts a long time. It's also a quickly digested carbohydrate that can spike your insulin levels. Not good. It's in your best interest to come up with ways to get rid of it in your dishes, even if you're not hopping on the low-carb bandwagon. Type 2 diabetes is practically inevitable on the SAD, and I'd rather not spend the second half of my life working to afford the medications for my lifestyle diseases. So here are the easiest ways to replace it and other white carbs.