Question 1

What order do I use the products in?

Accepted Answer

Cleanse, treat, hydrate. Cleanser first, then three to four drops of the serum on damp skin, wait about two minutes, then seal with the cream. Morning and night. The shampoo is its own step: two or three washes a week.

Question 2

Can I use the serum with retinol or vitamin C?

Accepted Answer

Yes, with a little spacing. Use the serum in the morning and your retinoid at night, or alternate nights. Keep strong L-ascorbic acid (vitamin C) to a different time of day; low pH can destabilise the copper complex. Gentle derivatives are fine alongside it.

Question 3

How long until I see a difference?

Accepted Answer

Most people notice texture and glow within two to three weeks. The look of firmness is slower: the published GHK-Cu studies ran eight to twelve weeks, and that is where the changes showed. Give a bottle its full run before you judge it.

Question 4

Why is the cream blue?

Accepted Answer

No dye. Copper peptide complexes are blue the way copper sulphate is blue: the colour is the metal itself and a straightforward indicator of concentration. Fragrance-free, dye-free, and free of anything that would react with copper.

Question 5

Is GHK-Cu safe for sensitive skin?

Accepted Answer

GHK-Cu is one of the gentler actives in skincare: no adjustment period, no peeling, no photosensitivity. Every formula is fragrance-free. Patch test anything new (a small amount behind the ear or on the inner arm for 24 hours) and if you have a known metal allergy, make it 48.

Question 6

Are the products vegan and cruelty-free?

Accepted Answer

Yes. The peptide is synthesised, not animal-derived, and nothing is tested on animals at any stage.

Question 7

How fast do orders ship?

Accepted Answer

Orders leave us within 1–2 business days. US delivery takes 2–5 business days; shipping is complimentary over the free-shipping threshold shown in your bag. You receive a tracking link the moment the parcel is scanned.

Question 8

What is the guarantee?

Accepted Answer

14 days, no forms. If a product isn’t right for your skin, email us within 14 days of delivery and we refund it. Keep the bottle. One refund per product per household.

Question 9

How does the subscription work?

Accepted Answer

Subscribe & save takes 15% off every delivery. Choose 4, 6 or 8 weeks; skip a shipment, pause or cancel any time from your account. A 30 ml bottle lasts about six weeks at twice a day.

Question 10

Can I change my delivery address?

Accepted Answer

Yes, from Account → Details, up to the day before a shipment leaves. Changes after that apply to the next delivery.

Question 11

Is Mystifi clinically tested?

Accepted Answer

The ingredient is; our finished formulas are not yet. GHK-Cu has four decades of published research, including randomised, double-blind trials, and every number on this site comes from that literature; see The studies. We describe what those studies found about GHK-Cu, not what Mystifi’s formulas do at our concentration; an independent instrumental study of our own is budgeted, and we will publish it when it exists.

Question 12

Should I patch test?

Accepted Answer

Yes, with anything new. Apply a small amount behind the ear or on the inner arm and wait 24 hours (48 if you have a known metal allergy). Keep the products away from the eye itself and from broken skin; if anything stings or reddens, stop, rinse and write to us. These are cosmetics (they cleanse and improve the appearance of skin and hair), so if you have a skin or scalp condition, your dermatologist’s advice comes first.

Question 13

Does the shampoo help with hair loss?

Accepted Answer

We don’t claim that, and we won’t until the evidence exists. The research on GHK-Cu and hair is thin: small, older studies, and the most-cited one tested the peptide combined with another compound. What the scalp wash does is cosmetic: it cleans without stripping, leaves the scalp comfortable and leaves hair looking fuller and denser once dry. If your hair has changed suddenly, see a doctor.

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