Girls can supplement collagen by eating pig skin, chicken skin, fish skin, beef and sheep skin, etc. Animal dermis is rich in collagen. Eating more in moderation can replenish the lost collagen in the body, and in addition, you can ingest more collagen through stew. You can also eat animal cartilage and bones properly. Compared with ribs, beef bones, sheep bones, chicken bones or fish heads and fish bones, eating these bones can suck out the bone marrow from the bones, which is not only delicious but also a good supplement to collagen. Women drink more fish soup and eat more fish meat, which not only won't get fat, but also can supplement high collagen, because the collagen in fish is much higher than that in other foods. Adequate collagen in women can not only delay skin aging, but also prevent cardiovascular diseases.