Questions, answered

GHK-Cu (copper tripeptide-1) is a naturally occurring complex of three amino acids bound to a copper ion. It is one of the most studied molecules in skin science and is associated with supporting the skin's renewal processes and the appearance of firmness and smoothness. We dose it at 2% in Face Serum and 1% in Face Cream.

Face Serum is a lightweight, regenerative treatment with a higher 2% GHK-Cu concentration, applied first. Face Cream is a richer, ceramide-supported moisturiser at 1% GHK-Cu that seals in the serum and reinforces the look of the skin barrier. Together they form The Essentials.

Yes. Senn Blue is formulated to be suitable for all skin types. As with any new skincare, we recommend patch testing first and introducing one product at a time if your skin is sensitive.

Yes. Senn Blue is formulated with clean and conscious ingredient choices, and we do not test on animals.

Twice daily. On clean skin, press two to three drops of Face Serum across the face and neck and allow it to absorb. Follow with a small amount of Face Cream, pressed over the top to seal. Consistency over weeks is what delivers results.

Skin responds to consistency. Published research on the GHK-Cu copper peptide, the molecule at the heart of Senn Blue, generally assesses results over a 12-week period, so we recommend giving the ritual a full 12 weeks. Many people notice improved hydration and a smoother feel sooner. These statements describe the appearance of skin; individual results vary.

Senn Blue is designed as a complete two-step ritual on its own. If you wish to incorporate other actives, introduce them gradually and ideally at a different time of day. If you have specific concerns, consult a skincare professional.

We offer free standard shipping on all orders over $150. Orders below this are charged a flat-rate fee calculated at checkout.

Yes. If you are not satisfied, please contact us within 30 days of delivery and we will help arrange a return or exchange in line with our Shipping & Returns policy.