Who reduces people's knowledge, intelligence and memory?

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The following are the main reasons for the loss of knowledge, intelligence and memory in humans:
1. Inadequate Sleep: Lack of adequate sleep reduces brain function, thereby impairing cognition and memory.

2. Poor Diet: A poor diet fails to provide the brain with the nutrients it needs, which can reduce memory and intelligence.

3. Stress and Anxiety: Excessive stress and anxiety reduces brain function and impairs memory and cognition.

4. Drugs and Alcohol: Excessive drug and alcohol consumption damages brain neurons, which reduces cognition and memory.

5. Lack of exercise: Lack of physical exercise reduces blood circulation, which prevents adequate oxygen from reaching the brain and reduces memory and intelligence.

6. Aging: As we age, brain function naturally declines somewhat.

7. Mental diseases: Various mental diseases like dementia, Alzheimer etc. reduce memory power and intelligence.

8. Information overload: Information overload and overuse of technology puts stress on the brain, which can reduce memory and focus.