Eu não aguento a criatividade do brasileiro!
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There's a Nature paper out this month that quietly rewrote what creatine does in your body.
For thirty years the story has been simple. Creatine powers short, hard efforts in muscle. It tops off the energy system your body uses for sprints and heavy lifts. That part is real. It's been studied to death. It's why creatine sits in millions of cabinets.
What the new paper shows is that this is half the story. Your brown fat, the kind your body uses to make heat when it's cold, has a second engine that runs on the same molecule. When you get cold, stored fat breaks down inside brown fat cells and releases a small molecule called glycerol. Glycerol flips a switch that turns on a heat-producing cycle. Creatine moves through that cycle, getting charged with energy and releasing the energy as heat, over and over. Each loop burns calories.
This was not a sudden discovery. The cycle was first described in 2015. The proteins that run it were identified in 2021. The switch that activates it is what got solved this month, in mice, with the same machinery confirmed in humans.
So what's actually useful here.
Your body already has creatine. You make about a gram a day on your own and get another gram from meat and fish if you eat them. Vegetarians and vegans run on the low end of normal because plants don't carry it. Three to five grams a day from outside the diet tops off your muscle stores in about four weeks. Whether it tops off this brown fat cycle the same way has not been tested in people yet. We don't know.
What is tested in people is the trigger. Cold air activates brown fat. You don't need an ice bath. Sixty to ninety minutes in a room around 60 to 65 degrees, repeated regularly, measurably turns it on under a PET scan. That's been replicated in humans since 2009.
The bigger point is the framing. Creatine has been positioned as a workout ingredient for three decades. The biology says it does more than that, all day, in tissue most people don't think about. Whether you take it or not, your body is using it for this right now.
Bunk J, Hussain MF, Delgado-Martin M, Samborska B, Ersin M, Shaw A, Rahbani JF, Kazak L. The Futile Creatine Cycle powers UCP1-independent thermogenesis in classical BAT. Nat Commun. 2025;16(1):3221.
Resuelto el vínculo entre estrés y dermatitis:
Neuronas simpáticas que conectan directamente con la piel son activadas por estrés; entonces reclutan y activan eosinófilos,estos liberan citocinas proinflamatorias, que acaban amplificando la inflamación
https://t.co/zBafgrJ1Ui