2. If you want to take Lycium barbarum for health care for a long time, you can eat 8- 10 capsules a day according to your physique. Of course, people who are hot and easy to get angry should not eat for a long time. For diabetic patients, although Lycium barbarum can regulate blood sugar, it should not be taken in excess, and taking it in large quantities will also consume too much sugar, which should not exceed 10 capsules a day.