I'm a designer as well, not just a developer, and it's layout is really well done: clean, straightforward, clearly presented, and the data is easy to find. They link to studies and always err on the side of caution in their descriptions.
In my experience, this is often the cause of mysterious drops in search ranking. It's very easy to inadvertently introduce changes that negatively impact your ranking without even noticing.
At a quick glance, I noticed that many articles on examine.com link to hundreds of external references (e.g. more than half the page of https://examine.com/supplements/creatine/). In Internet Archive snapshots from before the redesign, these have the rel="nofollow" attribute, but on the current site, they do not. I'm not saying that's the cause, but it might be worth looking into exactly what changed in the redesign.
For me, I've never even heard of the website in question. Why would I, as it's not a field of interest for me. However, if I were to search for it, it would be a search engine result, not a search field on some website I have never knew existed.
Sidebar: examine is one of two sites I regular use the google site filter for: “site:examine.com (supplement name)”. A good search engine would put it first for basically any supplement.
Also, the main page has 2 search boxes if we want to get pedantic about it. Why? I'm assuming as a dev type mindset that they will do the same thing as one is always there while the landing page disappears with use.
And so if you end up on https://examine.com/supplements/creatine/ it pretty much blows away all other pages on creatine.
So at the end of the day, you still end up on useful information.