Yes. Developed by Dr. Rivers for sensitive skin, it's formulated without parabens and without added fragrance, including masking scents. Fragrance is one of the most common causes of skin irritation. Its 0.5% retinol helps smooth the look of fine lines, and our 4-week start-up helps your skin adjust comfortably. Your first full-product order is covered by our 30-day money-back guarantee.

It's 0.5% retinol, a cosmetic retinoid you introduce gradually with our 4-week start-up schedule. Prescription retinoids such as tretinoin (Retin-A) are medicines, so they aren't directly comparable, and ours is formulated for sensitive skin. If you already use a prescription retinoid, ask your doctor before adding Retinol Treatment.

Give it 4 weeks of regular use once you're through the start-up schedule, because our testing measured results at 28 days. Retinol works gradually, so stay consistent: every evening, a pea-sized amount, moisturizer after. Daily sunscreen protects the progress you make.

We recommend avoiding it while pregnant, trying to conceive or breastfeeding, as a precaution. The proven harm comes from oral isotretinoin, a prescription medicine. Topical retinol is poorly absorbed through intact skin, and research on topical retinoids suggests harm is unlikely, but no safe level has been established, so the advice is to avoid it rather than limit it. Our Anti-Aging Serum contains no retinoids.

Slowly, over 4 weeks, every evening. Week 1: apply a pea-sized amount, leave it on for 1 hour, then wash it off and moisturize. Week 2: 2 hours. Week 3: 3 hours. From week 4, leave it on overnight. If your skin needs more time, halve the wear time and hold it for a week before stepping up.

Every evening once you're through the 4-week start-up, or every other evening if your skin stays dry. Using more won't work better and can cause irritation. At a pea-sized amount, the 30 mL bottle lasts about 6 weeks. That's how long it takes to use up, not how long it keeps once opened.

No. Use the Glycolic Peel on a non-retinol evening, up to twice a week, and go back to Retinol Treatment or the Neck Cream the next evening. Alternating this way lets you have both: the peel's exfoliation and retinol's smoothing, without asking too much of your skin in one night.

Yes, with timing. Anti-Aging Serum goes on first in the evening; let it dry completely, then apply Retinol Treatment. If that combination feels like too much, use the serum in the morning instead. Corrector V2 goes in the morning on retinol evenings, and if you're adding both, start the Corrector two weeks before the retinol.

Hinokitiol is our signature antioxidant, found naturally in the Pacific Red Cedar and studied for decades. It's a natural antibiotic, anti-inflammatory and antioxidant with other skin-revitalizing properties, and in our formulas it helps to even skin tone, reduce the look of sun damage and correct dark spots.

Our skincare products are produced and tested to the highest standards of tolerance on sensitive skin. They are hypoallergenic, fragrance-free, colorant-free and cruelty free.