
That's a condition called "Argyria". The man in the photo is Paul Karason. The press reported his story in 2007, and those pictures are real.
Taffin did not tamper with the colour saturation on that photo.

Karason consumed homemade silver chloride colloid and used a silver salve on his face.

He passed away in 2013 of a heart attack and a stroke [I think both at the same time].
Back to the fellow that Taffin posted, shown squatting, this blurb was from the Instagram page linked in the OP:
trainedbyjp
More squat session wisdom from a week ago - i look like I have been punched in the face as I just did 7 and half plates and now going back in for a back off set. I am fascinated by human potential , it’s a big driving force for me , in terms of pushing levels of muscularity and pushing strength. Now, because of social media , human potential is rocketing , if your not pulling 400kg from the floor - you aren’t relevant in the pull game ( and man it won’t be long until 500 is a regular thing either ) , if you aren’t pressing the 100kg dumbells or incline barbell pressing 5 plates , you aren’t relevant in the Push game.......it is all one big game - well it is in my head , but it’s a game I want to be good at ! This mindset blurs lines a lot between powerlifting and bodybuilding , so if your a bodybuilder , please just standardise your form to reap the benefits. The game gives you a chance to push your limits every time you step in the gym, can you beat your best 8 rep, your best 20 rep lift ? ( with good form, meh so boring that has to be said over and Over) Who inspires you to push for more? - tag your favs so we can watch their stuff. For me , squatting - it’s @85gunit , I think about him a lot because he so damn good but also so damn nice and always helps me when I ask, so check him out. #trainedbyjp 📽 @magiceyemedia
With respect to the bolded portion of the blurb above:
[1] Is social media the driving force behind the recent increases in gains on the deadlift? I would attribute it to {1} use of the elephant bar that has more bend than the regular bar, and so breaking inertia doesn't start until a little later into the lift, {2} the straps that allow the bar to hang down a little more than conventional straps thus reducing the range of motion for the lift, and {3} the fact that generally those lifting 1000-lb [454-kg] are strongmen, where hitching is allowed. I don't think that the deadlift has gone up very much in standard powerlifting terms since Andy Bolton's 1003-lb deadlift at the WPC World's in 2006:
[2] Even using the standards above [wonky elephant bar, extra strength/grip straps, and strongman form with hitching], does anyone think that 500-kg will be a regular thing? I mean - how many guys currently do 454-kg [1000-lb]? I know we have Eddie Hall, Hafthor Bjornsson, Brian Shaw, Jerry Pritchett, Jean-Francois Caron, in addition to Andy Bolton [whose record in real raw deadlift is, I believe, 1009-lb in 2009], and Benedikt Magnússon [who hit 1015-lb in 2011]. I know I am probably missing some other 1000-lb deadlifters in there. Still though - even if there are 12 guys who can deadlift 1000-lb, I don't think we can really call it a "regular thing". I guess it's open to opinion what exactly "regular thing" means.
I admire his motivation - and after seeing him talk normally, I was happy to say he looked younger than he did when he was turning purple from deep squatting, but I must say - I do fear for the health of these guys. As much as I enjoy being entertained by them, I don't want them to die for me.
You know?