The presenter was branded “fabulous” and “naturally beautiful” by adoring fans who rushed to comment on her latest post.
In the snap, the former Strictly star’s brunette locks were wild and untamed as she embraced her natural look.
Reid wrote: “BACK! And in need of my glam squad! See you on @GMB tomorrow 6am (This is what happens when my hair dries naturally...).”
One fan wrote: “Still looking utterly fabulous! Looking forward to your return, you have been missed.”
Another said: “Best insta pic yet!!! It’s lovely to see our ‘we want to be like you’ celebs’ being normal - makes you all the more fab....”
“Sling your hook glam squad we don’t need you, you have natural beauty Susanna,” another comment read.
Others praised Reid, 48, for “keeping it real” by posting her “true selfie” with many telling her that she “doesn’t need make-up”.
“Great to see this natural shot, looking gorgeous. Well done for posting and keeping it real,” read one comment.
Reid returned to the Good Morning Britain desk on Tuesday morning after several weeks off over the Easter holidays.
The presenter found herself co-anchoring the show with Richard Madeley instead of her usual partner Piers Morgan, who is still in America.
It didn’t take long before Reid was squirming live on air as Madeley embraced his inner Alan Partridge and started to wonder what it would be like to use haemorrhoid cream on his face.
Addressing his fake-tan faux pas last week, Madeley explained that he had been contacted by somebody else who also mistakenly used a lotion on his face instead of aftershave balm. The viewer, however, had an even worse experience than Madeley's tanning mishap after reaching for haemorrhoid treatment.
Puzzled, Madeley pondered what impact the cream would have on the face but was soon cut off by Reid saying: “I thought we were talking about fake tan not haemorrhoid cream!”
Undeterred, he continued: “What happens if you put haemorrhoid cream on your face? I suppose it tightens up?"
Good Morning Britain is on ITV, weekdays at 6am