Human bodies genuinely glow in the dark

The human body emits visible light, glowing with an intensity about one thousand times weaker than our naked eyes can detect. This ultra-weak photon emission is a byproduct of biochemical reactions: metabolic cellular respiration produces free radicals that react with lipids and proteins, emitting tiny pulses of light. Using ultra-sensitive cryogenic cameras, researchers found that our bioluminescent glow ebbs and flows throughout the day, peaking in late afternoon.

Sources

• Imaging of Ultraweak Spontaneous Photon Emission from Human Body Displaying Diurnal Rhythmjournals.plos.org ↗
• BiophotonWikipedia ↗