Learn Farsi: بیماران نمی‌توانند نان غیر ارگانیک با گلوتن زیاد بخورند. - Patients cannot eat non-organic bread with a lot of gluten.

Yes! gheyr connects to the adjective orgânik using an Ezafe (gheyr-e orgânik). Because this entire phrase acts as a compound adjective modifying nân (bread), the noun nân also needs an Ezafe to attach to it. The full spoken chain is nân-e gheyr-e orgânik.

Why is the verb for eat (بخورند) in the subjunctive mood rather than the normal present tense?

The subjunctive mood (bo-khor-and) is triggered by the modal verb نمی‌توانند (they cannot). In Farsi, when using verbs expressing ability, desire, or necessity, the main action verb that follows must be in the subjunctive. The standard subjunctive prefix be- changes to bo- here to match the rounded vowel in the verb root khor.

The word for patients is written as بیماران (bimârân). Can we use the standard plural suffix ها instead?

Yes, بیمارها (bimârhâ) is perfectly correct and more common in everyday conversational Farsi. The suffix -ân used here is specifically for animate nouns (people and living things) and gives the sentence a slightly more formal, professional, or written tone, which is typical for medical topics.

Is there an Ezafe between گلوتن (gluten) and زیاد (ziyâd)?

Yes, an Ezafe is required to connect the noun to its modifying adjective, making the spoken phrase . Because ends in a consonant, the Ezafe is pronounced as a short 'e' sound but is not explicitly written in the standard Farsi script.