Dark spots, age spots, and under-eye shadows are common skin concerns, especially as we get older. Social media is full of claims that a simple baking soda paste can erase them overnight—but there’s no scientific evidence that baking soda can safely or effectively lighten dark spots in one night.
In fact, using baking soda on your face may do more harm than good because it can disrupt your skin’s natural protective barrier.
Let’s look at what actually works and how to care for your skin safely.
Why Do Dark Spots Appear?
Dark spots (also called hyperpigmentation) can develop because of:
- Sun exposure
- Aging
- Acne scars
- Hormonal changes
- Skin injuries or irritation
- Certain medications
Under-eye darkness may also be caused by:
- Genetics
- Thin skin
- Lack of sleep
- Allergies
- Dehydration
- Natural aging
Why Baking Soda Isn’t Recommended
Baking soda has a high pH (it’s alkaline), while healthy skin is naturally slightly acidic.
Using baking soda on your face may:
- Dry out the skin
- Cause irritation or redness
- Damage the skin barrier
- Make sensitive skin worse
- Increase the risk of post-inflammatory pigmentation
For these reasons, dermatologists generally do not recommend using baking soda as a facial treatment.
Ingredients With Better Evidence
If you’re looking to fade dark spots over time, these ingredients have stronger scientific support:
Vitamin C
Vitamin C is an antioxidant that can help brighten the skin and reduce the appearance of pigmentation with regular use.
Niacinamide
Niacinamide (Vitamin B3) may help improve uneven skin tone and strengthen the skin barrier.
Azelaic Acid
Azelaic acid can help reduce post-inflammatory pigmentation and improve overall skin tone.
Retinoids
Retinoids encourage skin cell turnover and may gradually fade dark spots. They should be introduced slowly, as they can cause irritation.
Sunscreen
Daily sunscreen is one of the most important steps in preventing existing dark spots from becoming darker and helping treatments work effectively.
Use a broad-spectrum SPF 30 or higher every day, even on cloudy days.
