Frequently asked
questions

GHK-Cu (glycyl-L-histidyl-L-lysine copper) is a naturally occurring peptide found in human plasma, saliva, and urine. It declines with age — by 60, levels drop to roughly 40% of what they were at 20. Over 4,000 published studies show it supports collagen synthesis, antioxidant defence, and tissue remodelling. We pair it with grass-fed tallow because tallow's fatty acid profile closely mirrors human sebum, creating an ideal delivery vehicle that absorbs without occluding pores.

Grass-fed beef tallow, jojoba oil, GHK-Cu tripeptide, tocopherol (vitamin E), rosemary leaf extract, sunflower seed oil. Eight ingredients total — no fragrance, no essential oils, no parabens, no synthetic preservatives. Every ingredient serves a functional purpose.

Yes. The formula is fragrance-free and contains no common irritants. Grass-fed tallow is biocompatible with human skin — its fatty acid profile closely matches our own sebum, so it absorbs without clogging pores. Many users with rosacea, eczema-prone, or acne-prone skin report improvements. If you have a specific allergy, check the full ingredient list on the product page before purchasing.

Light and clean — a faint, natural scent from the grass-fed tallow and jojoba. No added fragrance, no essential oils. Most people describe it as neutral or slightly creamy. It fades within a minute of application.

No. Our products are not tested on animals. Research citations on our pages refer to published studies by independent researchers — we reference them for transparency, not because we conduct animal testing.

Take a pea-sized amount, warm it between your fingertips, and press gently into your face and neck. Use once daily at night after cleansing and before any other products. For accelerated results, apply twice daily. One jar lasts roughly 60 days with once-daily use.

Most users notice softer, more hydrated skin within the first week. Visible improvements in fine lines, tone, and texture typically appear between weeks 4–8. GHK-Cu works through your skin’s own biology — it’s not an overnight cosmetic fix, it’s a cumulative biological process. The 12-week timeline on our product page breaks down what to expect at each stage.

Yes. Apply the balm as the last step in your routine — it acts as an occlusive layer that locks in whatever you’ve applied underneath. Many customers use it over retinol, vitamin C, or hyaluronic acid without issues. If you use prescription-strength retinoids, allow them to absorb for 10–15 minutes before applying the balm.

Room temperature, away from direct sunlight. Shelf life is 12 months from the date of manufacture. No refrigeration needed. The whipped texture may soften slightly in warm weather — this is normal and doesn’t affect efficacy.

Orders are processed within 1–2 business days. Standard UK shipping takes 2–4 business days. International shipping typically takes 5–10 business days depending on your location. Multi-jar orders (3 Jars and 5 Jars) ship free.

Yes. We ship worldwide. International orders may be subject to local customs duties and taxes, which are the responsibility of the buyer. Tracking is provided for all orders.

If your order hasn’t shipped yet, email hello@itseureka.com and we’ll take care of it. Once it ships, we can’t modify it — but our 60-day return policy has you covered if you change your mind.

Subscribe and save 15% on every order. Your jar ships automatically every 60 days — no need to remember to reorder. You can pause, skip, or cancel anytime from your account dashboard. No commitments, no penalties. First order ships immediately.

60-day satisfaction guarantee, no conditions. That’s 4× the industry standard 14 days. Used or unopened — doesn’t matter. Email hello@itseureka.com for a full refund. No need to send anything back.

Because our product works through a biological process that takes time. Some users experience a temporary adjustment period during weeks 2–4 as GHK-Cu activates your skin’s natural repair processes. We designed the guarantee to extend well past this window so you can evaluate the product fairly — not under pressure.

Yes — anytime, no questions asked. Log into your account, go to Subscriptions, and pause or cancel with one click. There are no minimum commitments and no cancellation fees. If you need help, email hello@itseureka.com.