Topical application of lemon juice provides the following benefits.

1. Boost collagen production
Vitamin C, abundant in lemons, has been shown to increase collagen production. (1)

Clinical trials have demonstrated that applying vitamin C directly to the skin stimulates collagen production in both younger and older humans. The increased collagen helps give the skin a more youthful appearance.

2. Lightens skin
Because of its high concentration of vitamin C, lemon extract is often used as a skin-lightening agent in products such as Skin Bright, (11) which helps reduce hyperpigmentation. (12)

3. Protects the skin from UV damage
The vitamin C in lemon pulp helps shield the skin from the harmful effects of ultraviolet radiation. (1) Vitamin C applied topically has been shown to protect the skin from UV-induced damage by lowering free radical formation. (13)

Moreover, vitamin C is a powerful antioxidant that helps eliminate oxidants such as those produced by pollution and sun exposure. (2)

4. Provides antifungal effects
The antifungal properties of lemon juice are helpful in treating fungal infections such as Candida rashes. 

 Is rubbing lemon juice on my face beneficial?

Experts agree that when used sparingly, topical application of lemon juice can benefit facial skin and won’t cause irritation. With its antiaging antioxidants, lemon juice is a quick fix for tired skin.

However, lemon juice alone should never be applied directly to the face, even if diluted.

How long should I leave lemon juice on my face?
Lemon juice can be left on the skin for up to 20 minutes without causing adverse effects. However, you should immediately wash your face if you experience stinging, burning, or redness.

Final Word

Using skin care products made with natural ingredients is always preferable to those made with potentially harmful chemicals.

When it comes to using natural ingredients for skin care, lemons are not outliers. They are effective antioxidant, antimicrobial, and antifungal agents that are beneficial for the treatment of oily and acne-prone skin. However, even natural ingredients have both benefits and drawbacks.
Conclusion:
Using lemons too much or incorrectly may cause skin irritation and other sensitivities. See a doctor if your face becomes red or irritated after applying lemons.
When it comes to using natural ingredients for skin care, lemons are not outliers. They are effective antioxidant, antimicrobial, and antifungal agents that are beneficial for the treatment of oily and acne-prone skin. However, even natural ingredients have both benefits and drawbacks.

Using lemons too much or incorrectly may cause skin irritation and other sensitivities. See a doctor if your face becomes red or irritated after applying lemons.