Yes, lemon juice concentrate is generally considered gluten-free.
Lemon juice concentrate is primarily made from lemon juice. Lemons themselves do not contain gluten, and the process of concentrating the juice typically doesn't involve adding gluten-containing ingredients. Therefore, it should be safe for individuals with celiac disease or gluten sensitivity.
However, it's always a good practice to check the product label for any "may contain" statements or allergen warnings. While uncommon, some manufacturers might process lemon juice concentrate in facilities that also handle gluten-containing products, leading to potential cross-contamination. Additionally, be cautious of flavored lemon juice concentrates, as added ingredients could potentially introduce gluten. Look for pure, unflavored lemon juice concentrate for the safest option.
In summary, pure lemon juice concentrate is naturally gluten-free, but always verify the label to ensure no cross-contamination or gluten-containing additives are present.