Vitamin D — Food & Nutrition

What is Vitamin D?

The 'sunshine vitamin' important for skin immunity and barrier function — deficiency causes skin problems

Synthesized through sun exposure but sunscreen use increases deficiency risk. Supplement with fatty fish, eggs, and mushrooms.

Characteristics & nutrition facts

Vitamin D is a nutrient synthesized in the skin upon exposure to UVB sunlight, and is known to be involved in maintaining the skin barrier and immune balance. However, the combination of sunscreen use, indoor lifestyles, and reduced sunlight in winter may decrease synthesis and increase the risk of deficiency. It is known that a deficiency may lead to drier skin and slower skin recovery.

How to manage

Dietary supplementation through oily fish such as salmon and mackerel, egg yolks, and shiitake mushrooms is recommended. If taking supplements, consuming them with dietary fat may help with absorption. Long-term high-dose intake carries a risk of toxicity, so if a deficiency is suspected, a blood level test and consultation with a dermatologist or internist is advisable.

Good to know alongside

Vitamin D is frequently discussed alongside the terms 'sunshine vitamin,' calcium metabolism, the skin barrier, and immune modulation. Balanced intake with vitamin K2 and magnesium is also commonly mentioned.

Everyday care tips

It is preferable to meet vitamin D needs through diet or supplementation while continuing to use sun protection. Rather than intentionally seeking unprotected sun exposure for synthesis, dietary adjustment is recommended; consulting a specialist is advised if a deficiency is suspected.

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Frequently Asked Questions (FAQ)

What is Vitamin D?

The 'sunshine vitamin' important for skin immunity and barrier function — deficiency causes skin problems. Synthesized through sun exposure but sunscreen use increases deficiency risk. Supplement with fatty fish, eggs, and mushrooms.

Related Entries

• Fatty Fish
• Colorful Vegetables
• Vitamin C-Rich Fruits
• Nuts & Seeds
• Protein Foods
• Fermented Foods
• Omega-3 Fatty Acids
• Vitamin E

Explore Other Categories

• Squalane (Ingredients)
• PHA (Polyhydroxy Acid) (Ingredients)
• Madecassoside (Ingredients)
• Tranexamic Acid (Ingredients)
• Panthenol (Ingredients)

Sources & References

• Korea Food Safety Portal
• NIH Office of Dietary Supplements

Medical Disclaimer

SKINROUTE is not a medical device or healthcare provider. All content is general skincare information for reference only. If you have concerns about your skin, please consult a board-certified dermatologist.