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Comment by olah_1 | Hacker News Reader

I have never felt an affect from oral vitamins in any situation.

Sitting in the sun however seems to do more than just “increase vitamin d levels”. The sensation is just overwhelmingly lovely. It seems to reduce cortisol, makes you feel tired in a euphoric way. Animals love to warm their fur in shafts of sunlight too.

Perhaps we should be thinking more in terms of joyful activities in general and less trying to biohack.

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> Animals love to warm their fur in shafts of sunlight too.

Indeed. My dog always lies in the sun for a while when he goes outside. Once he's warm enough, he moves to the shade. Animals know.

My blind cat always seeks sun spots as well!

That narrative might work for you, but the bio-hack narrative might work for others.

Maybe the takeaway is to go into things with a positive attitude but also take a personal inventory and adapt if something that is supposed to work doesn’t work for you.

100% the same for me as well. When I sit in the sun I feel invigorated, I Feel a rush of pleasant feelings throughout my body.

I take vitamin D regularly, 4000iu+, and I don’t feel anything remarkable. With the sun it’s almost an instant jolt of joy.

Yes sunlight makes me extremely tired, like if I go for a walk or a picnic or something I'll end up far more exhausted than anything else can explain. I wonder if it's some kind of overcompensating effect due to my typical lack of it.

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