Poor sleep again and again quietly disrupts the hormones that guide your energy level, mood and alertness. When your nights are short or broken the signals that normally stay balanced begin to slip out of rhythm. Stress hormones rise more easily while the calming ones drop. This leaves your brain doing extra work during the day because it is missing the steady support it needs. As this pattern continues the brain has trouble handling information smoothly. Staying focused becomes harder since a t
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Nicotine reaches the brain within seconds after entering the bloodstream. It attaches to specific receptors on neurons in the reward pathways, mainly in the ventral tegmental area. These receptors normally respond to acetylcholine, a natural messenger, but nicotine activates them more strongly and for a longer time. Once the receptors are stimulated, the neurons release dopamine into the nucleus accumbens. Dopamine creates a feeling of pleasure and reinforcement, which the brain remembers. Repea
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Stress creates rapid molecular changes inside the amygdala, the brain region that processes fear, alertness and emotional reactions. When the body senses a stressful event, nerve pathways send fast signals to the amygdala. This activates cells that release chemical messengers such as glutamate. Glutamate makes nearby neurons fire more easily, raising the overall activity level of the region. At the same time, stress hormones released from the adrenal glands begin to reach the brain through the b
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Stress creates rapid molecular changes inside the amygdala, the …
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Regular use of fizzy drinks puts a steady stream of acid into the stomach, and this gentle but constant pressure slowly wears down its natural shield. The stomach lining is meant to stand strong against powerful digestive acids, yet repeated exposure to the extra acidity from these drinks makes it less firm and less able to protect itself. With time the surface becomes more fragile and the deeper layers begin to feel irritation they were never meant to face. As this protective layer weakens, sma
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