A Christian woman is asking whether there are any methods for weight loss in Islam
Question

                i am obese women, 25 years old, i would like to know if islam permit to make diet in order to loose weight. and what kind of methods does islam permit to do.
Praise be to Allah.
    First of all 
    we would like to thank you for contacting our website, and we hope that 
    Allah, may He be exalted, will enable us and you to do that which He loves 
    and which pleases Him, and that He will guide all of us to His straight 
    path. 

    Part of the 
    greatness of the blessing in the religion of Islam is that it has not 
    omitted anything good that people need but it has enjoined it and pointed it 
    out, and it has not omitted anything evil of the affairs of this world and 
    the hereafter, but it has warned against it and forbidden it. Hence it is 
    complete and perfect in all aspects. 

    With regard to 
    this matter, Islam teaches some protective measures, the most important of 
    which is moderation in eating and the prohibition on extravagance therein. 

    Allah, may He 
    be exalted, says (interpretation of the meaning):

    “and 
    eat and drink but waste not by extravagance, certainly He (Allah) likes not 
    Al-Musrifoon (those who waste by extravagance)”

    [al-A ‘raaf 
    7:31]. 

    It was 
    narrated that Miqdaam ibn Ma‘di Karib said: I heard the Messenger of Allah 
    (blessings and peace of Allah be upon him) say: “The son of Adam does not 
    fill any vessel worse than his stomach. It is sufficient for the son of Adam 
    to eat a few mouthfuls to keep him standing upright. But if he must (fill 
    it), then one third for his food, one third for his drink, and one third for 
    his breathing.”

    Narrated by 
    at-Tirmidhi, 2380; classed as saheeh by al-Albaani in as-Silsilah 
    as-Saheehah, 2265 

    Some of the 
    salaf (early generations of Muslims) said:  Allah summed up all of medicine 
    in half a verse (interpretation of the meaning): “and 
    eat and drink but waste not by extravagance” 
    [al-A ‘raaf 7:31].

    End quote from
    Tafseer Ibn Katheer, 3/406 

    Ibn al-Qayyim 
    (may Allah have mercy on him) said, concerning what we learn from the verse 
    quoted above: 

    Here Allah 
    commands His slaves to consume food and drink that will maintain  the body 
    and replenish energy, and tells them that it should be of sufficient 
    quantity and quality to benefit the body; if it goes beyond that, then it is 
    extravagance, and both are detrimental to health and cause disease – I mean 
    not eating and drinking, or being extravagant in that regard. Maintaining 
    good health is all summed up in these few divine words.

    End quote from
    Zaad al-Ma‘aad, 4/195 

    For more 
    information, please see the answer to question no. 
    102374

    Obesity may be 
    due to genetic factors or some kind of disease, or it may be due to hormonal 
    imbalance in the body. But it may – as is the case for many people –be due 
    to eating too much and moving too little. The way to treat that is to 
    consult medical specialists, because our religion instructs us to consult 
    specialists in every field and to benefit from them so long as it does not 
    go against Islamic teachings, because Allah, may He be exalted, says 
    (interpretation of the meaning): “So 
    ask of people of knowledge, if you know not.” 
    [an-Nahl 16:43]. 

    For more 
    information, please see the answer to question no. 14325 

    We wish to 
    invite you to something that is more important than all of that, which is to 
    look for the path of your salvation and accept the final religion of Allah, 
    which was foretold by all of the Prophets before our Prophet Muhammad 
    (blessings and peace of Allah be upon him), the last of whom before him was 
    the slave and Messenger of Allah, and His Word, namely ‘Eesa ibn Maryam 
    (Jesus son of Mary); he foretold the coming of our Prophet (blessings and 
    peace of Allah be upon him). Allah, may He be exalted, says (interpretation 
    of the meaning):

    
    
    “And (remember) when ‘Eesa (Jesus), son of Maryam (Mary), said: ‘O Children 
    of Israel! I am the Messenger of Allah unto you confirming the Taurat 
    ((Torah) which came) before me, and giving glad tidings of a Messenger to 
    come after me, whose name shall be Ahmad.’ But when he (Ahmed i.e. Muhammad 
    SAW) came to them with clear proofs, they said: ‘This is plain magic.’

    
    
    And who does more wrong than the one who invents a lie against Allah, while 
    he is being invited to Islam? And Allah guides not the people who are 
    Zalimoon (polytheists, wrong-doers and disbelievers) folk.

    
    
    They intend to put out the Light of Allah (i.e. the religion of Islam, this 
    Quran, and Prophet Muhammad SAW) with their mouths. But Allah will complete 
    His Light even though the disbelievers hate (it).

    
    
    He it is Who has sent His Messenger (Muhammad SAW) with guidance and the 
    religion of truth (Islamic Monotheism) to make it victorious over all 
    (other) religions even though the Mushrikoon (polytheists, pagans, 
    idolaters, and disbelievers in the Oneness of Allah and in His Messenger 
    Muhammed SAW) hate (it)”
    [as-Saff 61:6-9].

    For more information, please see 
    the answers to questions no. 12628,
    82361 and 148661 

    And Allah knows best.