Yes. It was developed for the neck, where skin is thinner and prone to dryness, crepey texture and lines. Its 0.1% retinol, peptides, niacinamide and hyaluronic acid visibly improve the look of texture and fine lines, though no cream can tighten loose skin. Give it 12 weeks: most volunteers in our 12-week customer trial said their wrinkles had lessened.

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 0.1% retinol smooths the look of neck 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.

Yes, it's made for the neck and chest. For your face, Retinol Treatment is the better fit. You can use both on the same evening, each on its own area; don't layer them on the same skin. New to both? Start with one, and add the other once you're through its 4-week start-up.

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.

Slowly, over 4 weeks, every evening. Week 1: apply a pea-sized amount to your neck and chest 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.

A pea-sized amount over your neck and chest, 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. The 50 mL pack lasts about 3 months. 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.

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.