Summary
Dr. Stephen Cabral reviews the Sperti vitamin D lamp on his Friday Review episode, sharing his plan to stop vitamin D supplementation and test whether the UVB lamp alone can maintain his blood levels around 50-70 ng/mL. He explains that the lamp emits UVB rays that trigger natural vitamin D synthesis through the skin, requiring only five minutes every other day. He notes that Dr. Michael Holick of Boston University has validated the lamp for maintaining vitamin D levels, particularly in fair-skinned individuals and those with absorption issues like IBD or cystic fibrosis. The episode also covers the book Spark on exercise and brain health, Vaseline safety concerns, and recent virus research.
Key Points
- The Sperti vitamin D lamp uses UVB rays to stimulate natural vitamin D synthesis through the skin in just five minutes every other day
- Dr. Michael Holick (MD/PhD, Boston University) has endorsed the Sperti lamp for maintaining vitamin D levels in fair-skinned individuals and those with absorption problems
- Cabral plans to stop his 4,400 IU daily vitamin D supplementation and use only the lamp for six weeks, then retest blood levels
- The lamp is compact (two feet by one foot, 14 pounds) and comes with UVB-blocking eyewear for safety
- People with darker skin may need longer exposure times for the lamp to be effective
- Fair-skinned users should start with just one to two minutes to avoid pinkness and gradually work up to five minutes
- The UVB exposure from the lamp helps with mood, skin health, and sulfur-based detox pathways beyond just vitamin D production
Key Moments
Sperti UVB lamp as a vitamin D supplement replacement
Cabral introduces the Sperti vitamin D lamp, describing its size and explaining that it uses UVB rays to naturally boost vitamin D levels without tanning or sunburn, requiring only five minutes of use.
"15, 20 years ago, tanning was more popular, right? People would go to a tanning booth, they would get a tan, not great for the skin, probably not great for melanoma, etc. But what came of that was the understanding that even using a tanning booth would boost your vitamin D levels. Now, the problem is not good for the skin and again, could lead to melanoma-based issues. Well,"
Five minutes of UVB lamp exposure every other day for vitamin D
Cabral explains the Sperti lamp protocol, noting it requires only five minutes because the goal is vitamin D synthesis from UVB rays without skin damage, and advises fair-skinned users to start with just one to two minutes.
"You only need five minutes because the goal is you're not damaging the skin and you're not getting a suntan or sunburn. You definitely don't want a sunburn, but you are getting the UVB rays. And when we look at the overall rays that hit the Earth, about 5% to 10% or so are UVB."
Dr. Michael Holick validates the Sperti lamp for vitamin D
Cabral cites vitamin D researcher Dr. Michael Holick from Boston University, who has endorsed the Sperti lamp for maintaining vitamin D in fair-skinned individuals and those with absorption problems like IBD or cystic fibrosis.
"He has said specifically that the Spurdy lamp increases or maintains vitamin D levels in healthy people with fair skin as well as those with absorption problems like those that occur in inflammatory bowel disease, IBD, or cystic fibrosis."
