I have sensitive skin and react to some botanical ingredients. Is the arnica in this serum likely to cause irritation?

Arnica extract is included to help calm the look of stressed skin and reduce visible redness, but it belongs to the Asteraceae (daisy) family, which is a known allergen for some people. If you have ever had a reaction to arnica montana, chamomile, calendula, yarrow, or other plants in that family, treat this product with caution. The manufacturer's own guidance is to avoid use if you know you are sensitive to Arnica montana. For anyone without a known allergy, the risk is low, but a patch test is still wise: apply a small amount to the inner forearm, wait 24 hours, and check for redness, itching, or swelling before using it on your hands regularly. If irritation occurs, discontinue use and switch to a fragrance-free, botanical-minimal barrier cream. The serum is for external cosmetic use only — avoid contact with eyes and broken skin.