Peak Efficiency: Studies, often using skin samples (in vitro), have shown that wavelengths in the very narrow band of approximately 293 nm to 297 nm are the most effective at triggering this conversion.
In vitro studies have shown that vitamin D3 production increases in a dose-dependent manner. Effective doses used in studies on skin samples include:
0.75 MED (approximately 11.7 mJ/cm2)
1.5 MED (approximately 23.4 mJ/cm2)
3 MED (approximately 46.8 mJ/cm2)
And the goal is 1MED.
One study that achieved vitamin D synthesis in in vivo (rat) testing used a commercial UVB-LED system installed at 1.5 meters and an irradiance of 10.67 mW/m2 for general indoor lighting.
Another device designed for supplemental use found that, at a distance of 20 cm, an exposure time of 33–40 minutes could achieve the daily recommended vitamin D synthesis (400 IU).
A different device, using a broader spectrum (UVB fluorescent lamp), found optimal production at a distance of 14 cm with 10–15 minutes of exposure.
You guys need UVB LEDs or fluorescent lamps.
Peak Efficiency: Studies, often using skin samples (in vitro), have shown that wavelengths in the very narrow band of approximately 293 nm to 297 nm are the most effective at triggering this conversion.
In vitro studies have shown that vitamin D3 production increases in a dose-dependent manner. Effective doses used in studies on skin samples include:
0.75 MED (approximately 11.7 mJ/cm2)
1.5 MED (approximately 23.4 mJ/cm2)
3 MED (approximately 46.8 mJ/cm2)
And the goal is 1MED.
Another device designed for supplemental use found that, at a distance of 20 cm, an exposure time of 33–40 minutes could achieve the daily recommended vitamin D synthesis (400 IU).
A different device, using a broader spectrum (UVB fluorescent lamp), found optimal production at a distance of 14 cm with 10–15 minutes of exposure.