After reviewing the search results, here are some details about some of the best brightening creams, their positive and negative aspects, and their ingredients or materials:

1. Kojic Acid: This is a natural lightening and brightening skincare active that works by making an enzyme necessary for melanin production unavailable. It is usually made as a by-product of malted rice used to make sake/rice wine.

2. Vitamin C: This is another natural skin lightening active that is a powerful antioxidant that lowers melanin production. It is found in many skin lightening creams, including Meladerm, Zeta White, and Neutrogena Rapid Tone Repair Correcting Cream.

3. Alpha-arbutin: This is a plant extract found in the leaves of the bearberry plant. It can rival even the most effective skin brighteners and works by inhibiting the skins tyrosinase enzymes.

4. Niacinamide: This is a potent antioxidant that can even be taken as a food supplement. It is found in many skin lightening creams and can help reduce the appearance of dark spots.

5. Glutathione: This ingredient makes a fantastic partner to well-studied skin lightening ingredients like Kojic acid. While studies show glutathione is safe for use on skin, not so much is known about how well or how quickly glutathione can lighten skin.

6. Azelaic acid: This ingredient is found in some skin lightening creams and works by reducing the production of melanin in the skin.

7. Illuminatural 6i by Skinception: This cream offers a bulk discount that lets you order up to 6 months worth of products. It is one of the winners in the category of skin lightening creams.

8. Neutrogena Rapid Tone Repair Correcting Cream: This cream is the most inexpensive on the list and contains vitamin C, glucose complex, retinol, and hyaluronic acid, which are popular ingredients in anti-aging skincare products.

9. Brightening Cream by Indie Lee: This cream contains strawberry leaf extract, centella asiatica, safflower oil, squalane, and candelilla wax, which help brighten and moisturize the skin. It is formulated without parabens, mineral oil, sulfate-based detergents, synthetic fragrance, petroleum-based ingredients, phthalates, phenoxyethanol, formaldehyde, and GMO ingredients.

10. Skin-lightening products: These products contain chemicals that inhibit the production of the pigment melanin that occurs in skin cells called melanocytes. The various ingredients in skin-lightening products reduce the appearance of dark spots in different ways. Products containing hydroquinone reduce the number of melanocytes in the treatment area, reducing the concentration of melanin, leading to lighter skin. Some products contain vitamin C, an antioxidant that reduces melanin production in the melanocytes. Products containing glycolic acid or retinoids work by exfoliating the skin, which leads to skin cell turnover revealing lighter skin underneath.

Positive aspects of brightening creams:

• They can help even out skin tone and reduce the appearance of discoloration.
• They can brighten and moisturize the skin.
• They can provide antioxidant benefits and help plump the appearance of the skin.

Negative aspe...