Add the freshly squeezed lime juice, pineapple juice, low sodium soy sauce, minced garlic, cumin, paprika, crushed red pepper flakes, sea salt, black pepper, chopped cilantro, and olive oil in a mixing bowl. Stir to combine.
Add the chicken to a freezer-safe ziplock bag, followed by the fajita spice marinade. Press the air out of the bag and seal tightly, making sure to press the marinade around the chicken to coat.
Place in the fridge to marinate at least 30 minutes, up to overnight.
Notes
Recipe makes enough marinade for 2 boneless, skinless chicken breasts (approx. ½ pound). For 1 pound (approx. 4 breasts), you can double the recipe).Nutrition facts are for marinade only and do not include chicken breast.