Video·3 min read·May 2026

Harnessing Cold Exposure for Wellness: Insights from Recent Research

Cold Therapy|Mechanisms • 3 min read • Based on research by Swe Mar Oo, Hein Ko Oo, Hiroaki Takayama, Takehiro Kanamori, Yumie Takeshita, Kiyo-aki Ishii, Yoshiro Saito, Mami Matsushita, Yuko Okamatsu-Ogura, Masayuki Saito, Toshinari Takamura (2021)

In a world that often prioritizes comfort, the practice of cold exposure can feel daunting. Yet, embracing the chill offers profound benefits, especially when it comes to recovery and metabolic health. Recent research sheds light on the intricate dance between our bodies and cold environments, particularly focusing on brown adipose tissue (BAT), a unique type of fat that plays a crucial role in thermogenesis—the process our bodies use to generate heat.

Understanding the mechanisms at play can empower us to refine our wellness rituals. By exploring the role of selenoprotein P (SeP) in cold-induced thermogenesis, we can unlock new pathways for enhancing our resilience and overall well-being. This knowledge not only informs our recovery protocols but also helps us cultivate a deeper connection with our bodies during contrast therapy practices.

The Role of Brown Adipose Tissue

Brown adipose tissue (BAT) is unlike the white fat that most people are familiar with. While white fat stores energy, BAT actively burns energy to generate heat, especially in response to cold. This process is vital for maintaining body temperature and metabolic balance.

Research has shown that BAT's ability to burn energy is influenced by various factors, including a protein called selenoprotein P (SeP). In a study involving 87 healthy male subjects, scientists found that higher levels of SeP correlated with reduced BAT activity. In simpler terms, when SeP levels are elevated, our body’s capacity to generate heat through BAT diminishes, potentially impacting our metabolism.

Selenoprotein P: A Barrier to Thermogenesis

Selenoprotein P is a protein produced primarily in the liver and released into the bloodstream. The recent findings indicate that SeP can negatively affect the activity of uncoupling protein 1 (UCP1), a key player in the thermogenesis process. UCP1 is essential for converting stored energy into heat in BAT.

Essentially, when SeP levels are high, UCP1's activity is impaired, leading to a decrease in thermogenesis. Conversely, studies on selenoprotein-deficient mice revealed that these animals exhibited enhanced thermogenesis and improved glucose uptake during cold exposure. This suggests that reducing SeP might be a potential therapeutic target for conditions such as obesity and diabetes, allowing us to harness the power of cold exposure more effectively.

Practical Implications for Your Wellness Rituals

Understanding the dynamics between SeP and BAT opens new avenues for optimizing our wellness practices. For those engaged in contrast therapy—alternating between hot and cold exposure—this research highlights the importance of cold exposure in activating our body's thermogenic processes.

Incorporating regular cold exposure, whether through cold showers, ice baths, or outdoor activities in cooler temperatures, can stimulate BAT and promote metabolic health. This practice not only enhances recovery but also supports overall longevity by improving glucose metabolism and energy expenditure.

Key Takeaways

Cold exposure activates brown adipose tissue (BAT), which plays a crucial role in thermogenesis and metabolic health.
High levels of selenoprotein P (SeP) can impair BAT activity and UCP1 function, potentially hindering your metabolic efficiency.
Incorporating cold exposure into your wellness rituals can enhance recovery and promote resilience.

Based on: Selenoprotein P-mediated reductive stress impairs cold-induced thermogenesis in brown fat
Swe Mar Oo, Hein Ko Oo, Hiroaki Takayama, Takehiro Kanamori, Yumie Takeshita, Kiyo-aki Ishii, Yoshiro Saito, Mami Matsushita, Yuko Okamatsu-Ogura, Masayuki Saito, Toshinari Takamura (2021). Cell Reports

Contrast Collective • Science-backed wellness

Wim's Wise Words

A second take, from someone who's lived it.

🧊 Wim's Wise Words

Selenoprotein P-mediated reductive stress impairs cold-induced

The Core Claim — Your Antioxidants May Be Working Against You

This paper flips something most people in the wellness space take for granted. The conventional wisdom is clear: antioxidants are good, oxidative stress is bad, and anything that reduces free radicals is a net positive. The research out of Kanazawa University challenges that assumption at a fundamental level — at least when it comes to cold-induced thermogenesis.

The core finding is this: selenoprotein P (SeP), a protein produced primarily by the liver and released into circulation, actively impairs your brown fat's ability to generate heat during cold exposure. It does this by mopping up the reactive oxygen species (ROS) that your mitochondria need to activate UCP1 — the uncoupling protein that turns stored energy into heat. No ROS, no UCP1 activation. No UCP1 activation, no thermogenesis. Your cold plunge becomes considerably less metabolically potent.

In 87 healthy male subjects, higher serum SeP levels correlated with measurably lower brown adipose tissue activity after cold exposure. Mice without the selenoprotein gene ran warmer, cleared glucose faster, and responded more sensitively to noradrenaline. When researchers gave mice NAC — a common antioxidant supplement — before cold exposure, those benefits completely disappeared.

The problem isn't oxidative stress. The problem is when your body eliminates the very ROS it needs to adapt to cold. That's reductive stress — and it's a more elegant concept than most people realize.

How This Connects to What We Already Know

The 2014 Chouchani paper established the mechanism this research builds on: ROS modify cysteine 253 on the UCP1 protein through sulfenylation, making UCP1 more sensitive to noradrenaline. More ROS available during cold exposure means more UCP1 activation, more heat, more metabolic activity. SeP disrupts that chain by upregulating GPx4, a mitochondrial antioxidant enzyme that neutralizes the hydrogen peroxide before it can do its signaling work.

The same team had previously shown that high SeP levels cause exercise resistance in skeletal muscle. The pattern is consistent — SeP eliminates the physiological ROS burst that biological systems require to adapt and improve. Exercise, cold exposure, fasting — these all work partly through controlled oxidative stress. SeP is the brake on that entire class of adaptation.

Where the Nuance Lives

The consensus on ROS has shifted considerably over the past decade. There's broad agreement that chronic oxidative stress is damaging. Where researchers diverge is on acute, hormetic ROS — the short burst of oxidative signaling that initiates beneficial cellular adaptations. The antioxidant supplement literature is now wrestling with this. High-dose vitamin C taken immediately after exercise, for instance, appears to blunt some adaptation signals. SeP is the endogenous version of that problem.

The Practical Recommendation

Be deliberate about the timing of antioxidant supplements — especially NAC, high-dose vitamin C, or glutathione — relative to cold exposure. If you're using a cold plunge or contrast therapy to drive metabolic adaptation, taking antioxidants immediately before may reduce the thermogenic benefit. The ROS signal is the point. Let it run. Save antioxidant support for recovery windows well removed from your cold protocol.

The Surprising Connection — Your Liver Is Talking to Your Fat

What I find most elegant here is the hepatokine mechanism. Your liver produces SeP. A high-fat, high-sucrose diet upregulates liver Selenop expression. That SeP then travels through circulation to brown fat, where it suppresses thermogenesis. This is a direct molecular link between dietary quality and cold adaptation efficiency. Poor metabolic health — the kind driven by processed food — actively blunts your body's response to one of the most powerful metabolic interventions available. Clean up the diet, and you may find cold exposure works considerably better than it did before.

Selenoprotein P-mediated reductive stress impairs cold-induced

Harnessing Cold Exposure for Wellness: Insights from Recent Research

The Role of Brown Adipose Tissue

Selenoprotein P: A Barrier to Thermogenesis

Practical Implications for Your Wellness Rituals

Key Takeaways

Related articles

Neuregulin 4 mediates the metabolic benefits of mild cold exposure by

IF1 controls UCP1-dependent mitochondrial bioenergetics in brown

The Biological Clock is Regulated by Adrenergic Signaling in Brown Fat