This study reveals that kiwifruit and vitamin C supplements can enhance mood and vitality, with kiwifruit showing stronger benefits, uncovered through innovative smartphone surveys.
This study reveals that kiwifruit and vitamin C supplements can enhance mood and vitality, with kiwifruit showing stronger benefits, uncovered through innovative smartphone surveys.

Vitamin C's Powers to Improve Your Mood: A New Study | Everything Science | NewsBreak Original

This reads like an advert for kiwi.
It basically is...
A good practice is to check who funded the given study. Look under acknowledgements.
In this case, it was Zespri International Ltd. "the world’s largest marketer of kiwifruit"
The purported benefits claims are from self-assessment phone surveys..
Definitively no suspicion of bias in this research...