Health and fitness

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Across
  1. 2. active, positive, and full of energy
  2. 5. a state of not having, or not having enough, of something that is needed
  3. 7. stop eating completely, or almost completely, for a certain stretch of time
Down
  1. 1. the enlargement of an organ or tissue from the increase in size of its cells
  2. 3. a chemical naturally, released in the brain to reduce pain, that in large amounts can make you feel relaxed or full of energy
  3. 4. clean, especially in order to prevent disease
  4. 6. to establish something such as a belief so firmly that it is not likely to change