Lime Juice (Best Option)
1:1 (1 tablespoon lime juice per 1 tablespoon lemon juice)Lime juice contains citric acid similar to lemon juice, which helps break down proteins in the marinade, tenderizing meat and enhancing flavor absorption. The comparable pH and volatile compounds make it the closest match in both function and taste.
When substituting, use the same volume as lemon juice to maintain acidity levels. Be mindful that lime juice can have a slightly more bitter note, so tasting the marinade before use is recommended.
The final dish will retain the bright, fresh citrus character expected from lemon juice, with only a subtle difference in aroma that is generally well-received in most recipes.