It blended the blueberry's violet-blue extract, which contains large amounts of anthocyanins, with marigold extract, which contains lutein, carotenoids and vitamin B. Our fast-acting Blueberry Extract helps relieve eyestrain. Recommended for those who spend a lot of time at the computer or in front of other electronic screens. ✦How to use 1 day 2 tablets ✦Precautions - Please confirm the ingredients and do not take it if you have any food allergies. - Please take the daily recommended dosage and stop taking it when you feel abnormal. - Please confirm the ingredients and do not take it if you have any food allergies. For special populations (such as children, pregnant women, lactation, drug treatment, etc.), please consult a physician. - If you feel uncomfortable after use, please stop using it and consult a professional doctor. - Please close the seal immediately after eating and eat it as soon as possible. - Do not place in extremely hot or cold places, places exposed to direct sunlight. - Please keep out of reach of children. - Do not place in places where the sun hits or high temperatures. - Please be careful about fire.