Eternal Youth Blue Copper Peptide Serum

Eternal Youth Blue Copper Peptide Serum supports the skin's natural repair process with weightless hydration and a gentle, education-first approach to healthy-looking skin. Blue copper peptides, hyaluronic acid, botanical extracts, and nourishing oils help improve the appearance of fine lines, uneven tone, texture, and firmness for a smoother, more radiant complexion over time.

Compatibility & Usage FAQ

When should I apply this serum in my routine?

Apply to clean, slightly damp skin after cleansing and toning, before heavier creams, facial oils, or SPF. Patting gently helps the formula absorb fully before layering anything on top.

Can I use this serum with vitamin C?

Copper peptides and vitamin C are both active ingredients that can be sensitive to formulation pH and each other's presence. To minimize the chance of reduced stability or irritation, we recommend using them at separate times — for example, vitamin C in the morning and this serum in the evening — rather than layering them in the same step.

Can I use this serum with retinoids (retinol, retinal, tretinoin)?

Retinoids and copper peptides can be used in the same routine, but not necessarily in the same application step. If you're new to one or both actives, introduce them on alternating evenings first and observe how your skin responds before using them in the same session. If you notice increased redness, peeling, or sensitivity, separate them into different days or consult a skin care professional.

Can I layer this serum with exfoliating acids (AHAs, BHAs, PHAs)?

It is generally best to avoid applying this serum immediately on top of — or underneath — a low-pH acid exfoliant in the same step. If you use an acid toner or exfoliant, allow it to fully absorb and, if needed, apply a buffer (such as plain moisturizer) before this serum, or use the acid and this serum at different times of day or on different evenings.

Is patch testing recommended?

Yes. Before adding any new active to your full routine, apply a small amount to the inner arm or behind the ear for a few days to check for any sensitivity. This is especially relevant if your skin is reactive or if you're combining this serum with other actives.

What if I experience sensitivity or irritation?

Reduce frequency of use and simplify your routine — temporarily removing other actives can help identify the cause. If irritation persists, discontinue use and speak with a dermatologist or licensed skin care professional.

When should I consult a professional?

If you have a diagnosed skin condition, are using prescription topicals, are pregnant or nursing, or if irritation does not resolve after simplifying your routine, please consult a dermatologist or licensed professional before continuing use.