GR-7 is a safe product, but as any cosmetic in some cases an allergic reaction may occur, which is why we recommend performing a patch test on your skin 24h before using it to avoid potential side effects.

The first effects of the treatment should be visible within the first 7 days. The speed of regaining your natural hair colour depends on various factors, such as the amount of grey hair, lifestyle, age and cause of greying. Overall, it takes anywhere from 14-21 days to fully regain your natural hair colour. It is also crucial to be systematic and closely follow the directions for use.

Once your natural hair colour is fully regained after the initial treatment we recommend using GR-7 once a week to maintain the effect. More information can be found here.

Washing your hair during treatment will slow the process down. We recommend not washing your hair for at least 3-4 days to a week, after you first start using GR-7 for best effects. More information on the application can be found here.

Not at all, it’s a natural process! In the first stage of the treatment, your hair will be gradually darkening. It might initially change to what can be described as a “yellow-ish” colour, but do not worry, it is part of the process and only lasts for a few days. 

GR-7 was primarily developed to be used on the scalp, but we had some of our clients use it on their beards and they were happy with the results. However, the safety and effectiveness studies conducted by Eurofins were conducted for the use of GR-7 on the scalp only, which is why we cannot recommend the use of GR-7 on the beard. If you would like to use it on your facial hair, we would recommend performing a patch test first, as the skin on the face is more sensitive.

No, GR-7 Professional has not been tested on animals and does not contain any animal products.

The active substance is Tyrosine amino acid.

Shipping is calculated at checkout and depends on the region. Please note that all orders are sent from the United Kingdom or our European center, and extra customs charges may apply when ordering from outside the United Kingdom and the European Union.

Please ensure that your hair is at least 1 cm long before starting to use GR-7 Professional. This will ensure that the product penetrates the hair shaft.

GR-7 is a safe product, but as any cosmetic in some cases an allergic reaction may occur, which is why we recommend performing a patch test on your skin 24h before using it to avoid potential side effects.

The first effects of the treatment should be visible within the first 7 days. The speed of regaining your natural hair colour depends on various factors, such as the amount of grey hair, lifestyle, age and cause of greying. Overall, it takes anywhere from 14-21 days to fully regain your natural hair colour. It is also crucial to be systematic and closely follow the directions for use.

Once your natural hair colour is fully regained after the initial treatment we recommend using GR-7 once a week to maintain the effect. More information can be found here.

Washing your hair during treatment will slow the process down. We recommend not washing your hair for at least 3-4 days to a week, after you first start using GR-7 for best effects. More information on the application can be found here.

Not at all, it’s a natural process! In the first stage of the treatment, your hair will be gradually darkening. It might initially change to what can be described as a “yellow-ish” colour, but do not worry, it is part of the process and only lasts for a few days. 

GR-7 was primarily developed to be used on the scalp, but we had some of our clients use it on their beards and they were happy with the results. However, the safety and effectiveness studies conducted by Eurofins were conducted for the use of GR-7 on the scalp only, which is why we cannot recommend the use of GR-7 on the beard. If you would like to use it on your facial hair, we would recommend performing a patch test first, as the skin on the face is more sensitive.

Shipping is calculated at checkout and depends on the region. Please note that all orders are sent from the United Kingdom or our European center, and extra customs charges may apply when ordering from outside the United Kingdom and the European Union.

Please ensure that your hair is at least 1 cm long before starting to use GR-7 Professional. This will ensure that the product penetrates the hair shaft.