Height is a confusing trait genetically. … The study identifies three or four regions in our DNA that may be important for height. But it doesn’t find any specific gene or DNA change responsible for men being taller than women. Or any gene to explain why height can run in families.

Let’s take a quick second and explore some strange facts about height.

• Americans reached their max height in 1996.
• Astronauts can be as much as two inches taller in space. 
• Identical twins can be different heights. It’s not typically a wide margin, but it’s not uncommon to have a difference. So there are environmental factors at play here. How do they work?
• You shrink throughout the day. In the same way you shrink throughout your life. In the same way you grow at the international space station. You know what else fluctuates throughout the day in the same manner? Your vision.
• People lose up to three inches in adulthood.
• Average height of neandrathrals is essentially the same as modern man. 

What if any conclusions can we draw from these? 

• Height is not entirely genetic.
• The same mechanism that ages the body also shrinks your height.
• This mechanism also shrinks you throughout the day.

The only difference between you growing an inch and six inches is time. But time doesn’t exist in the brain. It exists on your body. So the longer your perception of time during these growth periods [the happier you are] the taller you will be.

That’s absurd.

So we control the time. We control the rate of growth. Your final height at least in part depends on how peaceful you are during your growth spurts.

Sources:

1. https://uamshealth.com/healthlibrary2/medicalmyths/dopeopleshrinkastheyage/
2. http://www.berkeleywellness.com/self-care/preventive-care/article/why-you-shrink-you-age
3. https://www.quora.com/How-much-does-the-body-shrink-in-height-throughout-the-day-Does-having-a-strong-core-reduce-or-eliminate-that-shrinkage
4. https://www.menshealth.com/health/a19547705/do-tall-guys-die-younger/
5. https://www.huffingtonpost.com/entry/7-ways-heigh-affects-your-health_us_5783ad23e4b0344d51500c3d
6. https://www.scientificamerican.com/article/how-much-of-human-height/
7. https://genetics.thetech.org/original_news/news60
8. https://www.pbs.org/newshour/nation/the-shocking
9. https://www.quora.com/How-can-you-increase-your-height/answers/15127039
10. http://www.slate.com/articles/health_and_science/science/2013/07/height_and_longevity_the_research_is_clear_being_tall_is_hazardous_to_your.html
11. https://www.huffingtonpost.com/entry/20-incredible-facts-about-the-philippines_us_58a80363e4b026a89a7a2b80
12. https://www.quora.com/Can-identical-twins-have-a-big-difference-in-height
13. https://www.unicef.org/philippines/health_nutrition.html
14. https://www.oxfam.org.uk/what-we-do/good-enough-to-eat
15. https://traditionally.wordpress.com/2012/10/13/the-dutch-diet-and-lifestyle/
16. https://www.zmescience.com/medicine/nutrition-medicine/bosnian-men-height-14042017/
17. https://www.cnn.com/2016/07/26/health/human-height-changes-century/index.html
18. https://www.nytimes.com/2016/07/26/health/average-height-peaked.html