How Long Should the Attack Phase of the Dukan Diet Last?

The Attack Phase is the first phase of the Dukan Diet and it provides a great kick start to your weight loss program. The length of the Attack Phase is variable and it lasts between 1 and 10 days and how long you need to stay on the Attack Phase depends upon how much weight you want to lose and how quickly. The best way to work out the length of Attack Phase that you need to use is to visit one of Dr Dukan’s official Dukan Diet sites and on the right hand side of the home page you will find a tool that will calculate your true weight.  When you have answered the questions you will be presented with a calculation like the one below. This tool also calculates your true target weight and gives you a good idea how long it will take you to lose those extra pounds and how long you will need to take to consolidate your weight loss before moving to Stablisation.


  If you don’t want to use Dr Dukan’s official tool you can use the information to give you a rough guide.

    • Less than 10 pounds to lose – a one day Attack Phase.
    • Between 10 and 20 pounds to lose – a three day Attack Phase.
    • Between 20 and 40 pounds to lose – a five day Attack Phase.
    • Over 40 pounds to lose – a seven day Attack Phase is  acceptable.  A 10 day Attack Phase is only used in very exceptional circumstances  and with the benefit of medical advice to support it.

    • The Attack Phase needs to be long enough to start your diet off with a great weight loss boost that will provide you with the momentum and encouragement to keep going, but it also can’t be too long  or your body adjusts to the lower levels of fuel that it is receiving and it reduces your metabolic rate, the rate at which your body burns calories, in order to preserve your fat reserves.  This of course is the last thing that anyone trying to lose weight wants!
      The limited range of foods eaten during the Attack Phase can make following this part of the diet quite difficult for some people, for a period of more than four or five days but also very importantly the Attack Phase foods do not provide your body with a nutritionally balanced diet or enough fiber.  Most people can of course cope with this short lived, short fall in nutrients without any adverse effects, but if you have any medical problems or underlying health conditions it is important that you consult your doctor before you start the Dukan Diet.  Even if you have no known health problems this is still very sound advice.

      If you would like to know how much weight can typically be lost in the Attack Phase you might like to read this post – How Much Weight Can Be Lost in Attack Phase of Dukan Diet?

      If you would like to know a little more about the Attack Phase I have summarized the key points in this post- Dukan Diet Phase 1: 15 Key Points of Dukan Diet Attack Phase.

      If you are wondering what sorts of foods you can eat, the following posts provide you with a suggested 7 day meal plan

      You will also find lots of different recipes and other helpful information on this site to help you lose weight with the Dukan Diet.

61 Responses to “How Long Should the Attack Phase of the Dukan Diet Last?”

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  • Ken on September 12, 2017

    About how many fat grams should I expect to consume per day in attack phase?

    • Amber on September 16, 2017

      Hi Ken

      There are no figures as the amount will vary according to the foods eaten.



  • Courtney on May 7, 2017

    Hi, Amber!
    I need to lose 50 lbs. I’ve been on the attack phase for 6 days and am surprisingly happy and comfortable with it. I was planning on staying on it for 10 days, but after reading your post, I am unsure if I should stop at 7 or go for the 10 days. I don’t want to drop my metabolism!
    I have not discussed this diet, in particular, with my doctor, but I know I need to lose the weight.
    Please let me know your thoughts/suggestions. I am more than happy to continue with the attack phase for as long as you recommend!
    Thank you!

    • Amber on May 8, 2017

      Hi Courtney

      I’d say go with 7 days. Even though you have 50lbs to lose following such a restrictive diet without medical approval is not advised.

      Good luck


  • Karen Flynn on May 6, 2017


    Can you tell me please if Ratatouille and Flageolet Beans can be eaten on the Cruise Phase?


    • Amber on May 6, 2017

      Hi Karen

      Ratatouille on PV days in Cruise is fine but not Flageolet Beans.

      Kind regards


  • Karen Flynn on May 6, 2017

    Will be going on to the Cruise Phase of the diet on Monday, how long do I need to stay on it for please?

    • Amber on May 6, 2017

      Hi Karen

      You stay on the Cruise Phase until you reach your target weight. How long this will be depends on how much weight you have to lose and the rate of weight loss you achieve.



  • Carin F. on April 17, 2017

    Hi Amber,
    Thank you for this informative site !! My husband and I started the attack phase and stayed on it for 10 days before having any vegetables. The attack phase was very successful for us, however now that we are in the cruise phase we have each gained 2 pounds. I am concerned that we lowered our calorie intake for too long. I am concerned that we lowered our calorie intake for too long as you stated in the above post. Do you have any advice on how we can continue to move through the cruise phase successfully? I wish I had read your post a week ago!

    • Amber on April 18, 2017

      Hi Carin

      A bounce back or slow down in weight loss after a very effective Attack Phase is not unusual. Vegetables tend towards water retention while protein is diuretic so much of the weight gain is likely to be water. Stick with it and make sure that you are eating a reasonable level of calories you need a minimum of 1200 and your husband needs a minimum of 1500. Exercise is a good way of boosting your metabolism.

      Best wishes


  • Dawn on February 14, 2017

    can I have fat free cottage cheese

    • Amber on February 14, 2017

      Hi Dawn

      Yes you can.

      Kind regards


  • Natalie on November 24, 2015

    I have moved to cruise phase before the time i should be on attack i suppose to stay on attack 4 days and i only stayed for 2 days
    And i started cruise phase withPV
    Is that okay or i have to go back from day 1

    • Amber on November 26, 2015

      Hi Natalie

      If you want to have a shorter Attack Phase that is fine. THe Attack Phase is very restrictive and doesn’t suit everyone. It is better to move to Cruise than crash and burn on Attack.

      Kind regards


  • Christine on May 18, 2015

    Hello Amber on cruise we eat also the oat bran pancake every day ?

    • Amber on May 21, 2015

      Hi Christine

      Yes – every day you should have your daily serving of oat bran.

      Best wishes


  • Lanashatova on December 1, 2014


    Are peas and sweet corn allowed in attack phase?
    Thanks in advance


    • Amber on December 11, 2014

      Hi Lana

      Sorry these vegetables aren’t allowed in either Attack or Cruise Phases


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