I'll defer to an expert whose advice tends to make a lot of sense because he justifies his claims either with measurable scientific fact, or from his extensive experience in the industry. Plus I've learned a lot from watching his video series and fact-checking some of his claims. For your needs, I recommend watching the video in its 7-minute entirety. (Actually you can skip the first 1:30 without missing any relevant information if you want.)
https://www.youtube.com/watch?v=d5WFZx6-2hA
https://www.youtube.com/watch?v=d5WFZx6-2hA