Vitamin D from Sunlight Retention Question

[Guest guest]

OK, so I've had some time in the sun this summer. We're talking

southern Oregon between 10:45 and 11:30 - give or take. Only coconut

oil on my skin, not showering afterwards. About 3 or 4 days a week for

the last 3 weeks with one more week to go before I go back to work

(indoors). So how long can I expect the Vit D to stay in my body

without needing to supplement?

Thanks,

Rhonda