Why do I still have dark skin despite eating plenty of vitamin C-rich fruits?

SKĐS - Many people increase their consumption of vitamin C-rich fruits in the summer hoping to improve skin radiance and reduce dark spots and freckles. However, in many cases, skin remains dull and dark spots or freckles appear despite maintaining this habit.

Summer is a time when skin faces many adverse factors such as increased ultraviolet radiation, hot temperatures, and dehydration. Meanwhile, fruits rich in vitamin C are often considered "beauty foods" that help fight oxidation and reduce the risk of skin darkening. However, the effectiveness of vitamin C is often misunderstood or overestimated.

1. How does Vitamin C help brighten skin?

Collagen synthesis: Vitamin C is one of the essential nutrients for healthy skin. Besides its role in collagen synthesis, which helps maintain skin elasticity and firmness, vitamin C is also a powerful antioxidant, helping to neutralize free radicals produced by UV rays, environmental pollution, and the natural aging process.

Reducing melanin formation: For skin pigmentation, vitamin C can contribute to reducing melanin formation by inhibiting the activity of the enzyme tyrosinase – a key enzyme in pigment production. Thanks to this mechanism, adequate vitamin C intake from fruits and vegetables can help improve dull skin, fade hyperpigmentation, and help skin appear more even-toned over time.

Promoting skin cell regeneration: In addition, vitamin C helps repair sun damage, promotes skin cell regeneration, and contributes to slowing down the signs of premature aging. However, vitamin C is not an instant skin whitening agent and cannot completely eliminate dark spots or hyperpigmentation through diet alone. The effects of vitamin C are usually gradual and depend on many different factors.

Vitamin C is one of the essential nutrients for healthy skin.

2. Vitamin C cannot replace sun protection.

Excessive sun exposure: One common reason why skin remains tanned despite eating plenty of vitamin C-rich fruits is excessive sun exposure. Many people believe that adequate vitamin C intake can help "protect the skin from the inside out." In reality, vitamin C only helps reduce oxidative damage caused by ultraviolet rays; it doesn't prevent UV rays from penetrating the skin like sunscreen or other physical shielding methods.

When exposed to sunlight, especially between 10 AM and 4 PM, UV rays stimulate pigment cells to increase melanin production in order to protect the body. This is a normal physiological response, but it is also the reason why skin darkens. If you frequently engage in outdoor activities without using sunscreen or proper protection, the amount of melanin produced can far exceed the protective capacity of antioxidants from food.

Improper sunscreen use: Many people don't apply enough sunscreen, don't reapply every few hours, or only use it when going to the beach. These mistakes leave the skin vulnerable to UV damage even with a healthy diet.

In fact, sun protection remains the most important measure to prevent skin darkening, age spots, and premature aging.

3. Eating fruit alone is not enough to nourish your skin.

Vitamin C is just one of many nutrients essential for healthy skin. An unbalanced diet can still lead to unhealthy skin, even if it includes plenty of fruit.

The skin regeneration and repair process requires protein to synthesize collagen, along with many other micronutrients such as vitamin A, vitamin E, zinc, selenium, and omega-3 fatty acids. These nutrients contribute to maintaining the skin's protective barrier, supporting anti-inflammation, and helping the skin recover after damage.

Many people tend to increase their fruit intake but eat less fish, lean meat, eggs, dairy, or nuts. This can leave the body lacking the necessary building blocks to maintain the normal structure and function of the skin.

Notably, some people even replace main meals with fruit in the hope of losing weight or improving their appearance. This habit, if prolonged, can lead to deficiencies in protein and essential micronutrients, thereby affecting the skin's ability to regenerate.

Sunscreen should be used daily to limit skin darkening, age spots, and premature aging caused by sun exposure.

4. Other factors that cause skin darkening in summer

Besides diet and sun protection, many other factors affect skin color and health. These include:

- Prolonged sleep deprivation can increase oxidative stress and affect the skin cell repair process.

- Prolonged stress also increases cortisol levels, a hormone that can promote inflammatory responses and affect pigment production.

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Dehydration is a common but often overlooked condition during the summer. When the body isn't adequately hydrated, the skin can become dry, dull, and more vulnerable to environmental factors.

- Genetic factors.

- Hormonal changes.

- Age.

- Using certain medications.

In reality, vitamin C-rich fruits are only one part of a comprehensive skincare strategy. To maintain healthy skin during the summer, it's necessary to combine a balanced diet, drink enough water, get enough sleep, manage stress, and especially protect your skin from UV rays with sunscreen and appropriate protective measures.

Vitamin C remains an important nutrient that helps brighten skin and provides antioxidant benefits. However, relying solely on a few glasses of orange juice or portions of fruit each day while neglecting sun protection and proper skincare can still lead to skin darkening under the summer sun.

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Source: https://suckhoedoisong.vn/vi-sao-van-sam-da-du-an-nhieu-trai-cay-giau-vitamin-c-169260601161122239.htm