The SLS in toothpaste actually alters the taste of many foods. However, the combination of orange juice being regularly consumed in the morning and how sour it is underneath the sugar make it a touchstone for how this process works.
Unfortunately, knowing how this process works won't stop it from happening. In fact, a 2005 study attempted to quantify how long it takes until tastes return to normal. Subjects in the study consumed orange juice, coffee, sausage, and processed cheese after brushing with "a strongly mentholated toothpaste." Fatty, solid foods had their taste return quickly, but it required at least an hour for orange juice to not taste like an edible dumpster fire.
So, if you have to brush before you consume orange juice and have no desire to cringe, plan accordingly.
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