These days it feels like there’s a problem with every food. Too much sugar, dyes, chemicals, carbs. Has to be fresh, local, or raw. Gluten-free and dairy-free. Has to be unbromated and organic. Now it’s histamine: can’t have chocolate, tomatoes, strawberries, citrus fruit, or yeast. OMG. I can’t deal with the pressures of motherhood, I swear.
Apparently the lab results for my daughter came back with an elevated histamine. She has a constant runny nose and sometimes a wheeze when she exerts herself, so it makes sense. Instead of giving me an antihistamine for her and calling it a day, I was given a book about how high blood levels of histamine is an indicator that my child is an undermethylator. Apparently (upon reading the book), many types of mental illnesses and physical afflictions affect those who are either over or under-methylated. (Methylation referring to the coating on your nerves or synapses which affects how much serotonin or dopamine or whatnot you are getting or absorbing). Therefore, my little undermethylator is highly prone to not only asthma-like symptoms and allergy symptoms year-round, she’s also at high risk for depression, obsessive-compulsive disorder, behavioral disorders like oppositional defiance disorder, and an extremely high sex drive in adolescence. (What??? Nooooo…)
And how do you think we make this better? Some supplements, and diet changes. Avoiding foods that unbind histamine (like citrus fruits) and foods high in histamine (like tomatoes and sauces, strawberries, and yeast, which means bread). I had a hard enough time switching types of bread, how the hell am I going to go without bread? Our go-to fruits are oranges and strawberries, now those are out as well as bananas??? And as she can’t have dyes, I gave her chocolate for special treats. Now she isn’t supposed to have that either! Legumes? No. Nuts? No. Hard cheese and pickles? No. Beans? No.
Is there anything besides lettuce in this world that is safe and healthy for this child???
It’s getting to the point where what she can eat is a lot less than what she can’t.
Mother of All Things 
That sounds so challenging. I hope you can find the foods that work for you and rotate meals without worrying about variety at this point. It is fascinating to me that such issues you describe could be dietary, or could be regulated by diet!
Paleo?
Ugh.