Circadian Health Innovations

In time for the holidays, a gift from CHI to MiEye users: infrared light sensing! We’ve just released an app and firmware update allowing users to measure and record near infrared (NIR) light. This is a burgeoning research area, with very little on real-world exposure patterns.

🚨🚨MiEye: This is the ultimate wearable to measure light coming to your body in the visible (and also infrared apparently). I have no financial relationship with this company. But this would be a great way of showing how much light patients in a hospital get before and during an intervention!!! circadianhealthinnovations.com youtube.com/watch?v=wg4_Js… @circadian247

Time outdoors in US: 7.6% from 1992: 😱 (what is it today?)

Exposure to brighter light at night was associated with greater risk of developing coronary artery disease, myocardial infarction, heart failure, atrial fibrillation, and stroke, developing cardiovascular diseases among adults >40 years. ja.ma/47lgien

Light at night and heart disease! Published today in JAMA Network Open. We found that those with the brightest nights had higher risks of coronary artery disease, myocardial infarction, heart failure, atrial fibrillation, and stroke. jamanetwork.com/journals/jaman…

@bryan_johnson What are you doing to get the right light? Happy to gift you one of our wearable light sensors. 🎁 doi.org/10.1073/pnas.2…

@bitcoinand_beef Working outside as much as you reasonably can is good advice. Getting enough bright light in the day to enhance circadian amplitude is too rare in modern life. As a start, try to at least have your lunch outside in a work day. Your clock will thank you.

Work outside as much as you possibly can, you won’t regret it. 4 reasons why it’s better for your health 👇☀️

@helios_brah @MaxGulhaneMD Light type matters, as does individual sensitivity. doi.org/10.1038/s41598…

An incandescent light bulb suppresses Melatonin by 20x more than candlelight With a regular blue-spike LED light bulb its 40x In 7 million years of humanoid evolution We had candlelight/fire for 1 million years Incandescents for 100 years Blue spike LEDs for 15 years

@AdamRochussen Light has a mood elevating effect, day or night. So if mood is particularly bad at night, there will be more motivation to seek it. The second paper I linked shows how more blue in a light leads to better rejection of negative self-directed thoughts.

@HealthyLight247 Can you elaborate on poor mood being improved with light at night? I haven’t heard of that before—seems counterintuitive

Depression is associated with disrupted circadian rhythms in the brain. Using post-mortem human brain samples & tracking time of death, the researchers looked at rhythmic gene expression in different brain regions between healthy and depressed subjects. 1/5

@AdamRochussen Also see doi.org/10.1093/sleep/…

Or perhaps depression leads to altered behaviour (such as late-night screen time) which then disrupts brain rhythms. In reality, there is probably causality in both directions, leading to a snowballing effect and a depressive downward spiral. 5/5 Full paper here: pnas.org/doi/full/10.10…

@hubermanlab @sleepdiplomat @BrandonLuuMD @MaxGulhaneMD @bitcoinand_beef

CHI will be at World Sleep in Singapore. Come visit us for some cool swag and demo a MiEye!

Preprint alert! Light at night predicts heart health. People with bright nights had significantly higher risks of coronary artery disease, myocardial infarction, heart failure, atrial fibrillation, and stroke. doi.org/10.1101/2025.0…

The amount of blue in your light sculpts how you think and we are just beginning to understand this non-conscious influence. We found that blue light reduces sensitivity to loss. This likely impacts many decisions we make. doi.org/10.1038/s41598…

@LaraWeed @hubermanlab @RogerSeheult We’re here to help! circadianhealthinnovations.com/analysis-servi…

@hubermanlab @RogerSeheult We’re still in the early days of applied circadian science. Just scratching the surface of quantitative methods. The future is bright ☀️

Remember that “I told you so” is a cynics path to failure. Let’s go with “awesome the trad media is catching on (to the DATA)!” Be nice mitochondriacs! The future of humanity depends on sharing what works not punishing those that were slow to arrive at the dance. Circadian rules.

@hubermanlab Circadian photoreception matters as well. More blue in the light, less loss aversion when gambling. nature.com/articles/s4159…

The best way to get hooked on gambling, or drama or any behavior is to disguise a loss as win. The best way to do that? Make losing exciting too, so you don’t notice you’re slowly drifting down… which simply makes you want to go back and try again & again & again, ad Infinitum..

CHI Data Portal is live! Drag and drop your MiEye light data and a sleep diary for incredibly detailed light analysis and circadian phase & amplitude modeling. Some nice figures too! Go check it out and take a test drive with our sample data files here: circadianhealthinnovations.com/analysis-servi…