| 1 | Research has shown that exercise can enhance personal immunity. | |
| 2 | Vitamin C is essential for maintaining a healthy immune system. | |
| 3 | Good sleep can enhance the body's energy and immune system. | |
| 4 | The primary use of this dietary supplement is to enhance immune function. | |
| 5 | The blood circulation also plays a role in regulating body temperature and immune defenses. |
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