Almonds, though? You can live without almonds. We definitely don't need use a trillion gallons of water each year to grow almonds in a desert during a drought.
the scientific journal Addiction
That's sound like an unbiased source.
Even if we take all of those adverse affects at face value, they're either statistical noise or questionable casual link. It's not like smoking tobacco where the odds of developing lung cancer go up 23 times that of non-smokers. It's also not like alcohol, where tens of thousands of people die from overdose alone each year.
The big problem is all the rocket jocks think that getting to Mars is hard part and they have the idea that since biology and ecology are "soft" sciences that those are just details that will work themselves out. Until someone starts a long term self-sufficient colony on someplace like Antarctica, its really hard to take an Mars colonization plan seriously.