Your questions. Answered.

GR-7 bottle
How long does it take to reverse grey hair?

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.

Will GR-7 Professional work on dyed hair?

GR-7 Professional restores the natural colour to hair that has gone grey, which is why it will not work on dyed hair. We recommend having at least a 2 cm growth of natural hair before starting the treatment to see the effects. 

How will I know if I am not allergic to it?

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.

Once I regain my hair colour do I have to keep using GR-7?

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.

How will washing my hair influence the effects?

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.

My hair has turned a little yellow at the beginning of the treatment. Is it a bad sign?

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. 

How long does a bottle last?
One GR-7 bottle is normally enough to go through the entire first stage of the treatment, so to fully regain the natural colour. To maintain the effect you will only need to use a little bit once a week, which makes the bottle last much longer. 
Can I use GR-7 on my beard?

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.

Has GR-7 Professional been tested on animals?

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

What is the active substance in GR-7 Professional?

The active substance is Tyrosine amino acid.

How much is shipping and are there customs charges?

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.

Can I apply GR-7 on a shaved head?

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.

Can I use GR-7 No More Grey Hair and GR-7 Anti Hair Loss Lotion at the same time?

If you would like to tackle greying and hair loss, we suggest first fully regaining your original hair colour with GR-7 No More Grey Hair and introducing GR-7 Anti Hair Loss Lotion in the second phase of the treatment. Once your colour is fully restored, GR-7 No More Grey Hair only needs to be used once or twice a week. At this stage, you can introduce GR-7 Anti Hair Loss Lotion on a different day, and after every wash.

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Contact details

  • office@gr-7.uk
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