I wanted to clarify something about red light, in regards to what I learned recently from Dr Jack Kruse. So I wanted to write this up to share but also some new perspectives. Is Red Light Therapy Safe to Use? Here's What Actually Matters This is one of the most common questions in our community. People see a red light panel and immediately wonder if it's doing something harmful. Is it disrupting hormones. Is it messing with sleep. Is it safe to use every day. Short answer: yes, it's safe. Long answer: the real question isn't "is red light safe," it's "when and why are you using it." Summer Rule: Get Outside First Right now it's summer. The sun is up early, setting late, and full-spectrum sunlight is sitting right outside your door for free. If you have access to real sunlight, that always wins over a panel. Sunlight isn't just red and near-infrared. It carries the full spectrum your mitochondria evolved to use, along with UV that drives vitamin D production, nitric oxide release, and skin health in ways no panel replicates. Red light panels exist to fill the gap when the sun isn't available. In winter, at high latitudes, or if you're stuck inside all day, that's when a panel earns its keep. In summer, your first move should be outside, barefoot if you can, skin exposed, before you reach for a device. Why Red Light at Night Doesn't Blunt Melatonin Here's the part that confuses most people. They think any bright light at night is a melatonin killer. That's true for white light, blue light, and most LED lighting. It is not true for red light. Melatonin suppression isn't about how bright a light is. It's about wavelength. Your eyes have a specific receptor, melanopsin, sitting in the retinal ganglion cells. Melanopsin is tuned almost exclusively to blue-green wavelengths, in the 460 to 490 nanometer range. That's the signal your brain reads as "it's daytime, hold off on melatonin." Red and near-infrared light sit way outside that range, typically 630 to 850 nanometers. Melanopsin barely responds to it. So even if a red light panel is pumping out a high lux reading, one of those old-school light meters, your brain's melatonin machinery doesn't register it as daytime. You can use red light in the evening, even at what looks like high intensity, and your circadian signaling stays intact.

…And It Started the Moment You Woke Up. Let's burn down a piece of wellness advice that's been recycled so many times people have stopped questioning it. "Have a small carb snack before bed to help you sleep." Maybe it's a banana. A little rice. Some oatmeal. Crackers with honey. Social media is full of it. So are functional medicine blogs and even some registered dietitians. The reasoning sounds logical enough: carbs raise insulin, insulin drives sugar into the brain, this process can blunt cortisol, and boom you are asleep. Neat little story. Mostly wrong. And not just a little wrong. Wrong in a way that's actively destroying your sleep quality, tanking your hormones, and keeping you stuck in a cycle of fatigue, cravings, and metabolic dysfunction. Here's what's happening. Your Body Runs on a Clock, And You've Been Hacking It With a Sledgehammer Every cell in your body contains a molecular clock. Not metaphorically, literally a set of clock genes (CLOCK, BMAL1, PER, CRY) that oscillate on a 24-hour cycle and govern everything from cortisol secretion to insulin sensitivity to melatonin production. This is your circadian system, and it is not optional. It is the operating system underneath every other system in your body. This clock is entrained (set and reset) primarily by light (and darkness). Specifically, the quality, timing, and intensity of light hitting your retina and your skin across the day. Food timing is a secondary zeitgeber (time signal), which means when you eat matters almost as much as what you eat. The mistake most people make is treating sleep as a nighttime event. It's not. Sleep is a 24-hour biological process that begins the second your eyes open in the morning. If you botch the morning, you are guaranteed to botch the night. No bedtime snack, supplement, or blackout curtain will fully compensate. What Actually Happens When You Eat Carbs Before Bed 1. The Cortisol Rebound Nobody Talks About Cortisol gets a bad reputation as a purely "stress hormone." That's like calling fire "that thing that burns your house down." Fire is also how you cook food and stay warm. Cortisol, in its proper circadian expression, is your most powerful anti-inflammatory, your primary fat-burning signal, and the engine of your morning alertness.