Skin Encyclopedia

An evidence-based skincare reference by SYNC Beauty.

Encyclopedia

Should I Patch Test Every Product?

a small-scale trial in which you apply a new product to a limited, discreet area of skin for several days to check for irritation or allergic reaction before using it...

Should I Patch Test Every Product?

a small-scale trial in which you apply a new product to a limited, discreet area of skin for several days to check for irritation or allergic reaction before using it...

Is SPF 100 Worth It?

higher SPF numbers offer only marginally more protection than SPF 30 to 50, so SPF 100 provides a small incremental benefit rather than a dramatic one. It can be useful...

Is SPF 100 Worth It?

higher SPF numbers offer only marginally more protection than SPF 30 to 50, so SPF 100 provides a small incremental benefit rather than a dramatic one. It can be useful...

What SPF Do I Need for Daily Use?

for everyday protection, broad-spectrum sunscreen of at least SPF 30 is widely recommended by dermatology organizations. Consistent daily application and adequate amount matter as much as the number, since most...

What SPF Do I Need for Daily Use?

for everyday protection, broad-spectrum sunscreen of at least SPF 30 is widely recommended by dermatology organizations. Consistent daily application and adequate amount matter as much as the number, since most...

Can I Exfoliate Sensitive Skin?

sensitive skin can often be exfoliated, but it calls for a gentler, less frequent approach using mild methods rather than harsh scrubs. Low-strength chemical exfoliants such as certain acids, used...

Can I Exfoliate Sensitive Skin?

sensitive skin can often be exfoliated, but it calls for a gentler, less frequent approach using mild methods rather than harsh scrubs. Low-strength chemical exfoliants such as certain acids, used...

How Long Does the Skin Barrier Take to Heal?

mild barrier disruption often improves within a couple of weeks with a gentle, consistent routine, while more significant damage can take several weeks or longer to fully recover. Healing time...

How Long Does the Skin Barrier Take to Heal?

mild barrier disruption often improves within a couple of weeks with a gentle, consistent routine, while more significant damage can take several weeks or longer to fully recover. Healing time...

How Do I Treat a Damaged Skin Barrier?

the usual approach is to simplify your routine and focus on gentle cleansing, consistent moisturizing, and sun protection while the skin repairs itself. Pausing exfoliants, retinoids, and other strong actives...

How Do I Treat a Damaged Skin Barrier?

the usual approach is to simplify your routine and focus on gentle cleansing, consistent moisturizing, and sun protection while the skin repairs itself. Pausing exfoliants, retinoids, and other strong actives...