Yes. Eternal Blue products are designed for all hair types and textures, including colour-treated hair.

Our formulas are gentle enough for regular use and have been developed to care for the scalp without stripping the hair or leaving it feeling heavy. While our study was not conducted as a sensitive scalp tolerance test, no adverse reactions were reported during the 150-day study.

If you have a particularly sensitive scalp, we recommend patch testing before use.

Yes. Eternal Blue was developed specifically to support healthy hair growth, improve the appearance of density and reduce visible shedding.

In an independent 150-day clinical study of our three-part system, participants experienced an average 31.7% reduction in true root shedding. In consumer questionnaires, 87.5% reported reduced hair shedding and 90% reported improved hair growth.

At the same time, significant or sudden hair loss can have more than one contributing factor. Nutrition, prolonged stress, hormonal changes, illness and other underlying changes can all affect the hair cycle. For this reason, we believe haircare should be considered as part of a broader approach to understanding and caring for your body.

Hair growth takes time, but with consistent use, many people may first notice earlier changes such as less visible shedding, hair feeling stronger, or the scalp feeling more balanced. Fuller, denser-looking hair generally takes longer because it depends on the hair growth cycle.

In our independent 150-day study, the majority of participants saw meaningful improvements across different measures of hair health, while others responded more gradually or showed little measured change.

For best results, we recommend using Eternal Blue consistently and giving your hair time to respond.

No. Each Eternal Blue product can be used on its own and incorporated into your existing haircare routine.

However, they were developed to work together as a complete system. The shampoo creates a clean, balanced foundation for the scalp, the conditioner helps strengthen and nourish the hair fibre, and the serum delivers concentrated care directly to the scalp.

For the most comprehensive approach, we recommend using all three consistently.

Part the hair as needed and apply directly to the scalp on damp or dry hair. You can apply it all over the scalp, or focus on areas where you would like to support density and reduce visible shedding. Gently massage in with your fingertips and leave in. Do not rinse.

For best results, we recommend daily use initially. Many people prefer applying it at night, allowing it to nourish the scalp overnight. Once you are happy with your results, you can gradually reduce how often you use the serum to suit your routine.

Yes. Eternal Blue’s complete three-part system was independently tested over 150 days with 40 participants.

The study assessed multiple measures of hair health, including hair strength, thickness, density, growth and shedding, alongside consumer questionnaires. Our claims are based on the finished formulas as a complete system, rather than supplier claims or studies of individual ingredients.

We currently ship throughout New Zealand.

Orders placed before 1pm on a business day are dispatched the same day. Orders placed after 1pm, or on weekends and public holidays, are dispatched the next business day.

Auckland and wider North Island orders are typically delivered overnight after dispatch. South Island orders have a target delivery timeframe of three business days.

Rural deliveries may take an additional one to three business days. Delivery times may vary during public holidays, severe weather or other courier delays.

Once your order has been dispatched, you will receive a shipping confirmation email with tracking details.

If your tracking information does not appear to be up to date, please contact us at hello@eternalblue.co.nz with your order number.

We begin preparing orders as soon as possible, so we cannot guarantee that changes or cancellations can be made once an order has been placed.

Please contact us at hello@eternalblue.co.nz as soon as possible with your order number, and we will do our best to help.

Please contact us at hello@eternalblue.co.nz as soon as possible with your order number and the correct delivery address.

If your order has not yet been dispatched, we will do our best to update it. Once an order has been dispatched, we may not be able to change the delivery address.

We accept returns on unopened and unused products within 14 days of delivery, provided they remain in their original condition.

To request a return authorisation, please contact us at hello@eternalblue.co.nz with your order number before sending your order back. For full details, please see our Returns & Refunds policy.

If your order arrives damaged, faulty or incorrect, please contact us at hello@eternalblue.co.nz as soon as possible with your order number and photos, and we will help resolve this for you.