Yes, 11 a.m. sun is generally considered a good time for vitamin D production because it falls within the peak hours (around 10 a.m. to 3 p.m.) when the sun's UVB rays, essential for vitamin D synthesis, are strongest, allowing for shorter, effective sun exposure, but you need to balance this with skin cancer risk, especially in summer. Aim for 5-30 minutes of sun on hands, arms, and face, depending on skin type and location, but always avoid sunburn.
Conclusions: Therefore at this latitude exposure to sunlight between the hours of 11 a.m. and 2 p.m. will promote vitamin D production in the skin year round.
The researchers took into account the amount of clothing and the season of the year. In spring and summer, 25 percent of the body (the hands, face, neck and arms) is exposed to the sun, and in these seasons, about 8 to 10 minutes of sun exposure at noon produces the recommended amount of vitamin D.
This lead us to conclude that for optimal vitamin D synthesis at minimal risk of cutaneous malignant melanoma (CMM), the best time for sun exposure is between 10 a.m. and 1 p.m. Thus, the common health recommendation (that sun exposure should be avoided between the hours of 10 a.m. and 4 p.m. and postponed to the ...
Taking this into consideration, the optimum time for sun exposure therefore is from 9:00 AM and before 10:30 AM, as well as after 2:00 PM until 3:00 PM. Similarly, Holick et al., have reported previtamin D3 production in Boston (latitude 42° N) was significant between hours of 10:00 AM and 4:00 PM during June.
Light exposure regulates your circadian rhythm — your body's internal clock. Sunlight in the morning, preferably in the first 30 to 60 minutes after waking, has been shown to increase alertness, boost mood, lower stress, and improve sleep quality.
Vitamin D is the sunshine vitamin that has been produced on this earth for more than 500 million years. During exposure to sunlight 7-dehydrocholesterol in the skin absorbs UV B radiation and is converted to previtamin D3 which in turn isomerizes into vitamin D3.
You can quickly raise your vitamin D levels by taking a vitamin D supplement (often the fastest method), eating vitamin D–rich or fortified foods, and getting safe sunlight exposure. Supplements, especially vitamin D3, generally work fastest, but always follow medical guidance for optimal results and safety.
These studies consistently show that elevated vitamin D from sunlight is associated with improved physical, mental and immune system function. Yet vitamin D supplementation studies don't show the same health effects.
“The optimal amount of sunlight depends on factors like skin type, location, and time of year, but a general rule of thumb is 10 to 30 minutes of direct sun exposure per day on bare skin,” explains Dr. Solt.
Fatty fish, egg yolks, and liver naturally contain vitamin D. It's also commonly added to foods, such as cow's milk, certain plant-based beverages, and breakfast cereals. You can also get vitamin D through supplements or cod liver oil.
In American diets, fortified foods (e.g., milk, breakfast cereals) provide most of the vitamin D. Few foods naturally contain vitamin D. The flesh of fatty fish (such as trout, salmon, tuna, and mackerel) and fish liver oils are among the best sources [17,1].
Fatty fish (like trout, salmon, tuna, and mackerel) and fish liver oils are among the best natural sources of vitamin D. Beef liver, egg yolks, and cheese have small amounts of vitamin D. Mushrooms provide a little vitamin D. Some mushrooms have been exposed to ultraviolet light to increase their vitamin D content.
Age and clothing style also have been reported to affect vitamin D synthesis [3, 4]. Vitamin D is involved in bone metabolism [5] and is positively correlated with bone mineral density (BMD). Vitamin D status is assessed by measuring vitamin D levels in plasma or serum.
This meta-analysis of 20 RCTs demonstrated that vitamin D supplementation significantly alleviates depressive symptoms, with an overall standardized mean difference (SMD) of -0.36 (95% CI: -0.52 to -0.20, p < 0.00001), supporting its role as a viable adjunctive therapy for depression.
Safe ways to get morning light
Step outside within 30 to 60 minutes of waking. Spend 5 to 15 minutes in natural light (no sunglasses if possible) Don't look directly at the sun, just be in the sunlight.