Glossary entry (derived from question below)
English term or phrase:
build tolerance
Arabic translation:
يعتاد شعرك وفروة رأسك على نوعية الشامبو - يصبح الشامبو عديم التأثير/أقل فعالية أو كفاءة
English term
Egypt
Immediate availability & 100% accuracy
Native in: Arabic (Variants: Standard-Arabian (MSA), Palestinian, Saudi , Egyptian, Jordanian, Iraqi, UAE, Lebanese, Syrian, Kuwaiti) 
, English
Works in: English to Arabic, Arabic to English, Persian (Farsi) to Arabic, and 1 more.
build tolerance
| 4 +2 | يعتاد شعرك وفروة رأسك على نوعية الشامبو - يصبح الشامبو عديم التأثير/أقل فعالية أو كفاءة |
Morano El-Kholy
|
| 4 | تعزز تحمل / تقوي تحمل |
Mahmoud Ibrahim
|
| 4 | يكتسبان مناعة ضد |
Muhammad Atallah
|
Dec 17, 2020 03:09: Murad AWAD changed "Field" from "Medical" to "Marketing"
Dec 30, 2020 04:50: Morano El-Kholy Created KOG entry
Proposed translations
Egypt
31 years of Experience. Available 24/7
Native in: Arabic 
Works in: English to Arabic, Arabic to English
يعتاد شعرك وفروة رأسك على نوعية الشامبو - يصبح الشامبو عديم التأثير/أقل فعالية أو كفاءة
There is no evidence to support this claim, although there could be a number of reasons why your shampoo isn’t working. Find out how you can use your shampoo more effectively.
Shampoo tolerance is a common myth
A common myth is that you can build up a tolerance to dandruff shampoo, so that it becomes less effective for you over time.
Many people believe in changing your shampoo regularly so that your body doesn’t build up a tolerance to one specific product.
There is no evidence to support this claim, although there are other possible reasons why your dandruff shampoo isn’t working effectively.
https://www.headandshoulders.com/en-us/healthy-hair-and-scal...
والله أعلم
Egypt
High Quality at Affordable Prices !
Native in: Arabic (Variants: Standard-Arabian (MSA), Egyptian)
Works in: English to Arabic, French to Arabic, Arabic to English, and 2 more.
تعزز تحمل / تقوي تحمل
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Note added at 10 mins (2020-12-16 10:12:40 GMT)
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https://www.arabdict.com/en/english-arabic/build tolerance
Egypt
Technical accuracy with fluency of style
Native in: Arabic (Variant: Egyptian)
Works in: English to Arabic, Arabic to English, Arabic, and 1 more.
يكتسبان مناعة ضد
من المعتقدات الخاطئة [أو الخرافات] أن الشعر وفروة الرأس يكتسبان مناعة ضد شامبوهات القشرة.
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Note added at 26 mins (2020-12-16 10:28:58 GMT)
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'Tolerance' here means the ability of hair and scalp to resist the action of dandruff shampoos. Below are two examples of sentences where the word is used with that meaning.
She took a little vervain every day and built up a tolerance to it.
Rotation of insecticides from different families may be effective at preventing the building of tolerance to the product.
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