What SPF should I use daily?

Dermatologists recommend SPF 30 as the daily minimum — it blocks 97% of UVB rays — but SPF 50 (98% blockage) is recommended for outdoor activities, high-altitude exposure, or if you have hyperpigmentation or melasma. SPF above 50 offers diminishing returns. More important than SPF number is reapplication: any SPF must be reapplied every 2 hours of direct sun exposure. Chemical sunscreens absorb UV; mineral sunscreens (zinc oxide, titanium dioxide) physically reflect it — both are effective when applied correctly (1/4 teaspoon for the face).

What is the difference between chemical and mineral sunscreen?

Chemical sunscreens (avobenzone, octinoxate, octisalate, homosalate) absorb UV radiation and convert it to heat. They are lightweight, sheer, and invisible on all skin tones, but can cause irritation for sensitive or rosacea-prone skin and must be applied 15–30 minutes before sun exposure. Mineral sunscreens (zinc oxide, titanium dioxide) sit on the skin surface and physically deflect UV. They work immediately, are less irritating, reef-safe, and better for sensitive skin, but can leave a white cast — though modern micronized formulas have largely solved this.

Can I use the same sunscreen on my face and body?

Yes, but face-specific sunscreens are formulated to be non-comedogenic (won't clog pores), lighter in texture, and often include skincare actives (niacinamide, antioxidants). Body sunscreens prioritize large-area coverage at lower cost and are often thicker or greasier. For acne-prone skin or daily wear under makeup, stick with a face-specific formula. For outdoor activity where you're applying head-to-toe, a body sunscreen on the face is fine. Look for "broad spectrum" on all sunscreen labels — this confirms both UVA and UVB protection.

sunscreen

What Is Kojic Acid? The Complete Skincare Guide

Kojic acid is the traditional Japanese skin-brightening ingredient derived from fermented rice. Here's how it works and the best products.

Last updated April 13, 2026 · 4 min read · First published Apr 2026

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The short answer

Kojic acid is a natural skin-brightening ingredient derived from fermented rice (used in sake production). It inhibits tyrosinase to fade hyperpigmentation. Works at 1-4% concentration. Gentler than hydroquinone but more intense than alpha arbutin. Pregnancy-safe. Popular in Asian skincare for decades.

How does kojic acid work?

The short answer

Kojic acid inhibits tyrosinase (melanin-producing enzyme) similar to arbutin and hydroquinone. Derived from Aspergillus fungi fermentation (same used in sake, soy sauce). Gentler than hydroquinone, slightly stronger than arbutin. Works on melasma, post-acne marks, age spots, uneven tone.

Kojic acid vs other pigmentation actives

The short answer

Kojic acid positioning: stronger than arbutin, gentler than hydroquinone. Effectiveness ladder: hydroquinone 4% (strongest, Rx or short-term OTC) > kojic acid 2-4% > alpha arbutin 2% > tranexamic acid (gentlest). Kojic works well stacked with niacinamide, vitamin C, tretinoin. 4-8 weeks visible fading typical.

Pigmentation ladder:

Hydroquinone 4% (strongest, prescription or short-term OTC)
Kojic acid 2-4%
Tranexamic acid 3-5%
Alpha arbutin 2%
Vitamin C (brightening)

Best kojic acid products

Premium pick

Shani Darden

Skin Sensitive Retinol Reform

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Retinol + lactic acid + kojic.

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Kojie San

Kojie San Skin Lightening Soap

$12

Traditional Filipino kojic soap.

Best for: Budget kojic use, body pigmentation

"The affordable kojic option."

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Best value

The Inkey List

Kojic Acid Serum

$15

Pure kojic acid serum.

Best for: Budget concentrated kojic

"Straightforward kojic acid at low price."

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How to use kojic acid

The short answer

Apply kojic acid after cleansing, before moisturizer. Can use AM + PM but more commonly evening-only. Start 3x weekly, ramp to daily if tolerated. Combine with vitamin C (morning) for enhanced brightening. MANDATORY: daily SPF. Kojic acid creates photosensitivity; sun exposure ruins results.

Application:

Timing: evening preferred, AM + PM OK
Frequency: start 3x weekly, ramp to daily
Pairs well: niacinamide, vitamin C, alpha arbutin, tretinoin
Mandatory: daily SPF
Results: 4-8 weeks visible fading

Kojic acid side effects

The short answer

Kojic acid side effects: mild redness/irritation initially (usually resolves), contact dermatitis in sensitive individuals (rare), photosensitivity (requires mandatory SPF), potential for over-lightening with long-term use. Start with lower concentration (1-2%) if new to avoid irritation. Patch test recommended.

Side effects:

Mild redness (initial acclimation)
Rare contact dermatitis
Photosensitivity (SPF mandatory)
Over-lightening risk with extended use

Frequently asked

Is kojic acid safer than hydroquinone? +

Yes. Gentler mechanism, no ochronosis risk, long-term use acceptable. Less aggressive action but similar results over time.

Can I use kojic acid during pregnancy? +

Generally considered pregnancy-safe at lower concentrations. Check with OB. Natural derivation makes many practitioners comfortable approving it.

How does kojic acid compare to tranexamic acid? +

Both fade pigmentation. Tranexamic targets hormonal pigmentation pathway (melasma); kojic targets general tyrosinase. Combine both for stubborn melasma.

Can I mix kojic acid with AHAs? +

Yes. Kojic + glycolic or lactic = enhanced pigmentation correction. Monitor for irritation.

Why is kojic acid popular in Asian countries? +

Long history of use in Japan, Philippines, Korea. Natural fermentation-derived + effective. Culturally preferred over hydroquinone which has stricter regulations in many Asian markets.

Keep reading

All articles →

sunscreen

What Is Alpha Arbutin? The Complete Skincare Guide

Alpha arbutin is the gentler, safer alternative to hydroquinone for pigmentation. Here's how it works and the best products.

Apr 2026 · 4 min read Read →

sunscreen

Best Sunscreens for Melasma: Iron Oxide + High SPF Picks

Melasma needs more than UV protection — you need iron oxide for visible light. Here are the SPFs that actually help fade dark patches.

Apr 2026 · 6 min read Read →

sunscreen

Chloasma (Mask of Pregnancy): The Complete Treatment Guide

Chloasma or 'mask of pregnancy' affects up to 70% of pregnant women. Here's the evidence-based prevention and treatment — during pregnancy and postpartum.

Apr 2026 · 6 min read Read →

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UV Clear Broad-Spectrum SPF 46

The derm favorite. Zinc + niacinamide, no white cast.

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Supergoop!

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Unseen Sunscreen SPF 40

Goes on like a primer. Zero white cast, zero scent.

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