Niacinamide Moisturizer Guide: Vitamin B3, Watermelon Extract and How to Choose

Niacinamide has become one of the most popular skincare ingredients of the last few years. You find it in serums, toners and more and more moisturizers. At the same time, watermelon extract has turned up in many hydrating creams. This guide explains what niacinamide is, what a good moisturizer needs, and why watermelon is more than just a pleasant scent.

What Is Niacinamide?

Niacinamide is a form of vitamin B3. In skincare it is valued because it is:

• Versatile: it works for oily, dry and combination skin.
• Gentle: most people tolerate it well, including many with sensitive skin.
• Easy to combine: it fits into almost any routine.

In cosmetics, niacinamide is used to support the skin's natural barrier, help skin tone look more even and minimize the look of pores. That is why it is so often found in daily moisturizers rather than only in expensive serums.

What Makes a Good Moisturizer?

A moisturizer combines three kinds of ingredients:

• Humectants draw water into the upper skin layer. Examples: glycerin, sodium PCA, sodium lactate, hyaluronic acid. Sodium PCA and sodium lactate are part of the skin's own natural moisturizing factors (NMF).
• Emollients are lightweight oils and esters that make the skin feel smooth. Examples: caprylic/capric triglyceride, coco-caprylate, olivate esters.
• Actives add an extra benefit, like niacinamide, antioxidants or soothing plant extracts.

A well-balanced moisturizer feels rich but absorbs without leaving a greasy film.

Why Watermelon?

Watermelon (Citrullus lanatus) is over 90% water, and its extract brings natural amino acids, lycopene and vitamins A and C to a formula. In skincare it is used for antioxidant hydration and a refreshing, lightweight skin feel. It also gives products a light, fresh character, which is why watermelon is especially popular in summer and in hydrating gel-creams.

Other Ingredients Worth Knowing

• Plant stem cell extracts such as lilac leaf cell culture provide antioxidant support.
• Bisabolol, from chamomile, helps soothe the look of redness.
• Totarol, from the New Zealand totara tree, is a natural antioxidant that helps keep skin looking clear.
• Prebiotics like fructooligosaccharides (FOS) are sugars used to support a balanced skin microbiome.
• Green tea, licorice root and cranberry extracts add antioxidant and conditioning properties.

How to Use a Moisturizer

1. Cleanse your face.
2. Apply toner.
3. Take a small amount of moisturizer and massage it in gently until absorbed.
4. In the morning, finish with sunscreen.

Tip: apply moisturizer while your skin is still slightly damp from toner. It helps lock in the extra water.

Which Skin Types?

A light, niacinamide-based moisturizer suits most skin types. Oily skin likes it because it absorbs quickly; dry skin can layer it twice in the evening. If your skin is very sensitive, patch-test first, especially with products that contain citrus peel oils.

Checklist Before You Buy

• Does it contain a meaningful active like niacinamide?
• Are there good humectants (glycerin, sodium PCA, hyaluronic acid)?
• Is it free from parabens, silicones and mineral oil, if you prefer that?
• Does it absorb without greasiness?
• Can it go under sunscreen and makeup?

Our Moisturizer

SUPPLI-X Watermelon Hydration Moisturizer combines niacinamide with watermelon, apple and lentil extracts, lilac leaf stem cell culture, green tea, chamomile, cranberry, licorice root, bisabolol, totarol and prebiotic FOS, plus sodium PCA and sodium lactate for hydration. Paraben-free, silicone-free, mineral-oil-free and cruelty-free. 50 ml, made in the USA.

Pair it with our DeepBlack Cleanse and Gentle Balancing Toner for a complete 3-step routine.

See Watermelon Hydration Moisturizer →

FAQ

What is niacinamide?

Niacinamide is a form of vitamin B3. In skincare it is used to support the skin's natural barrier, help skin tone look more even and minimize the look of pores.

Is niacinamide suitable for sensitive skin?

Most people tolerate it well, including many with sensitive skin. If your skin is very sensitive, patch-test first, especially with products that contain citrus peel oils.

Why is watermelon extract used in moisturizers?

Watermelon extract brings natural amino acids, lycopene and vitamins A and C. It is used for antioxidant hydration and a refreshing, lightweight skin feel.

When should I apply moisturizer?

After cleansing and toner, while your skin is still slightly damp. In the morning, finish with sunscreen.

For external use only. Avoid contact with eyes. If irritation occurs, discontinue use.