For me at least, this is certainly true. Even with significant dietary supplements and spending more time outside, I've only been able to get up to about 25 ng

For me at least, this is certainly true. Even with significant dietary supplements and spending more time outside, I've only been able to get up to about 25 ng/mL. This is a significant improvement for me, as my initial levels were below the sensitivity of the test, at <0.25 ng/mL, but still not ideal. I hadn't considered visiting a tanning salon; I may try that soon if things aren't notably improved after the next time I get this tested.