According to different people's physique and absorption, the action time of collagen is different. Generally speaking, eating for two months can make the skin smooth, delicate, transparent and firm, which is different from that before eating. Long-term consumption will obviously improve skin color and luster, and wrinkles, fine lines and spots can also be improved. A few people who absorb it quickly can feel the skin more moist and smooth in about 15 days; Those who are slow to absorb, or who are old and lose a lot in the body take longer, and it takes about three months to completely replenish them, thus improving the skin.