Happy chemicals of human body

Happiness is a very illusive term in human case as affecting variable are many. 

But for sure, happy people are more successful in multiple life domains.

• Physical, mental, emotional well-being is being governed or influenced by many external and internal factors, more often not in our control. 
• That's why this subject spans a lot many areas of external environmental factors and inner body chemistry. 
• Subjective well-being is all in the center of evaluation of happiness, positive and negative emotions are the end results.

Primary signaling chemicals of mood in humans are 4 (Neurotransmitter / Hormones) as below:

1. Serotonin, the mood stabilizer (neurotransmitter).
2. Oxytocin, the love hormone (hormone).
3. Dopamine, the rewarding chemical (neurotransmitter).
4. Endorphins, the pain killer (neurotransmitter).

Tips for living a happy life:

• Eat nourishing food, be in nature, exposure to sun shine, meditate for the feel good hormone (Serotonin).
• Keep company with good people, family, pet, love, laugh for the love hormone (Oxytocin).
• Do something meaningful each day with short and long term goal for the reward chemical (Dopamine).
• Get regular exercise, avoid news overdose, switch off bright screen - hours before bedtime, goodnight sleep of 6 to 8 hours every night for relaxing, pain killer (Endorphins).

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Interesting notes:

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Endorphins evolved in nature for survival. 

Injured animal run from predator or our ancestor's ran for help or to search for a source of water at any undisclosed distant places or a runner push through a race even in injury and likewise. 

Endorphin is produced in pain doesn't mean that one should inflict pain or harm oneself or over exercising beyond one's limit to feel good. Laughing out loud, meditation, working out in moderate, watching your favorite drama could help you to achieve this endorphin feel good effect.

Endorphins and dopamine: Endorphins relieve pain and dopamine motivates to push through challenges and provides a reward for doing so.

Opiates trigger the same receptor in the brain that triggers the release of endorphins. 

As endorphins binds pain signals and relieves, dopamine will motivate you to do same thing over and over again. So endorphins and dopamine actually work together. 

Out of more than 20 endorphins in our body, Beta endorphin is having stronger effect than morphine. That way the 'runner's high' exercise addiction and self harm could be understood.