Optimal Sunlight Exposure for Achieving Sufficient Vitamin D Levels

Vitamin D


Sunlight is not just harmful to our skin. It also ensures that our body produces the necessary vitamin D. But how long can we exposed to the sun to get enough vitamin d? Two or three times a week in the sun with bare arms, legs and face is enough to produce vitamin D. But the amount of vitamin D production depends on sun strength (UV index), skin type, season and time. Read more about how much vitamin D from sunlight is enough in the blog below:



First of all, the light from the sun, consists of a number of elements: Ultraviolet A (UVA), Ultraviolet B (UVB), Ultraviolet C (UVC) visible light and infrared (IR). UVC is blocked by our ozone layer and does not reach the earth’s surface.

UVA rays are present with relatively equal intensity during all daylight hours throughout the year, and can penetrate clouds and glass. These UVA rays make up the largest part of the ultraviolet radiation, so more than UVB. UVA penetrates deeper into the skin, even into the dermis. Free radicals are formed in the dermis by UVA rays. This causes damage to elastin and collagen fibers in the dermis,

UVB penetrates into the superficial epidermis and is responsible for our vitamin D production. So for a slow and longer lasting tan. Too much UVB causes redness, sunburn and eventually also skin aging and skin cancer. Unlike UVA, UVB does not penetrate glass.

What exactly is your skin type?

Dermatologists divide the different skins into 6 types according to Fitzpatrick, from light skin to dark. This classification has existed since 1975 and is intended to estimate the probability of sunburn.

Etnische Diversiteit Huidverzorging Sunlight
SkintypeFeatureSkin burnRisk of skin cancer
1Light eyes, red hair, frecklesAlwaysBiggest risk
2Light skin and eyes, blond hairFastHigh risk
3Light skin, dark eyesSeldomHigh risk
4Dark skin, dark eyes and dark hair (Mediterranean)Almost never, tans very wellModerate risk
5Dark toned skin (Asian)Very resistant to sunOccurs infrequently, but high risk of vitamin D deficiency
6Very dark skin (Negroid)Very resistant to sunOccurs infrequently, but high risk of vitamin D deficiency
Skin Type According To Fitzpatrick Classification

Although this format is the best we have now, there are limitations. Because what about if you are an Asian and Western mix (Wasians) or Asian/African (Blasians), what do you divide yourself into? A refinement, not yet optimal, is using a Fitzpatrick calculator. Learn more about Pigment

Picture of Dr. Francis Wu

Dr. Francis Wu

Dr. Francis Wu, een vooraanstaande dermatoloog, is de drijvende kracht achter Iconic Elements. Hij heeft sinds 2004 zijn expertise ingezet om een veilige en effectieve huidverzorgingslijn te creëren, geschikt voor zowel gezonde huid als huidproblemen. Iconic Elements, opgericht in 2016, is de eerste brede skincare lijn in Nederland ontwikkeld door een dermatoloog. Als medisch specialist streeft Dr. Wu naar het bevorderen van het welzijn van mensen door hoogwaardige en effectieve huidverzorgingsproducten te bieden. De proefdiervrije en vegan producten vermijden schadelijke chemicaliën en bevatten natuurlijke ingrediënten.
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