| |

Home > Diets > Meal Based Diet Navigation    
User Rating


of people who tried this diet like it

Tried it? Rate it!
out of 100
based on 128 reviews


Program offers 12 weeks of meal replacement to help you lose weight.

QUICK FACTS Start the Diet Now Advertisement
  • Established: 1974
  • Founder: Novartis Medical Nutrition Corporation; now owned by Nestle HealthCare Nutrition
  • Stock Symbol: NSRGY
  • Headquarters: Florham Park, New Jersey
  • Accessibility: Online, weekly one-on-one counseling
  • Diet Type: Meal replacement, liquid
  • Gender: Male, female

The OPTIFAST plan has been considered the ace of liquid-based diets since 1974. The meal replacement drinks and bars are recommended by physicians for patients weighing more than 50 pounds over their ideal weight or with a Body Mass Index (BMI) of 30 or more. OPTIFAST is recommended to help obese individuals prepare for gastric bypass surgery as well. All participants have full access to professionals like doctors, dietitians and counselors.

The OPTIFAST program follows strict guidelines to ensure the health and safety of patients with three key areas of concentration - medical, behavior and nutrition. Patients have an initial medical exam to make sure they meet the program criteria.

Progress is monitored during weekly one-on-one and group counseling, to help encourage healthy lifestyle changes.

  • People will lose weight on the introductory phase
  • Your weight loss is monitored by their experts
  • Proven results with clinical studies and over 1 million participants
  • Program gives support and counseling along with weight loss
  • Medical monitoring while on the program
  • Offers decrease in cholesterol, high blood pressure and high blood sugar levels
  • Great tasting meal replacement shakes
  • Doubtful that most health care professionals would recommend being on a meal replacement plan for any extended period of time
  • Program consists of all liquid diet
  • May be cost prohibitive for some

To participate in Optifast, you must first complete a preliminary medical exam. You will be assessed to determine any risk factors and make sure you are a good fit for the program. After passing that exam, you are given a personalized weight loss plan that is based on your current weight and your goals. You are monitored throughout the entire process. Your meals will consist of the Optifast shakes and meal replacement bars.


You get a customized activity plan for your fitness level and schedule.


Maybe the OPTIFAST meal replacement is nutritionally sound, but there are plenty of other programs that have you making sound choices with real food. This program is also very expensive. This combination can only lead to the conclusion that there are other choices that would come before OPTIFAST.

Common Misspellings

optyfast, opti fast, optifast progarm

Related Diets: Juice Diet, Slim Fast 321, Slim-Fast, Medifast , VF Smoothie

> Leave Feedback

User Feedback

(Page 2 of 14, 263 total comments)


Both my husband and I are on this program. We both miss food but the results are great. In the two weeks we have been on the program he has lost 15 pounds and I have lost 10. My only issue is, I wish I could lose weight as fast as him.

posted Apr 19th, 2013 12:39 am


That is great. I will start 04/18/2013.

posted Apr 11th, 2013 7:58 pm


I will start OPTIFAST on 4/18/2013. I will post by results

posted Apr 11th, 2013 7:55 pm


I started optifast on March 23 and I have lost 22 pounds in 8 days this stuff is awesome. However I do have a lot of indigestion. I am constantly burping but its worth it

posted Mar 31st, 2013 9:18 pm


I started Optifast on Jan 29 2013 - if you ask anyone around me my first week of the intensive phase was a good way. Weighing in at a heavy 149.9kgs I convinced myself to stick with it. In my first week I had dropped 8.3kgs. It has now been almost 8 weeks and I have have managed to lose 20kgs! My hard work and discipline has paid off thus far & I can't wait to see how many more kilos drop as I progress further into the program. Best decision I ever made!

posted Mar 27th, 2013 9:28 am


How much does optifast cost? I'm thinking about contacting Dr. Goldfarb to discuss this diet. I see that you are both having success on it, congratulations, it must feel great! I was wondering if you could tell me how often you have to see him and if the appointments are usually pretty on time. I'm a mother to infant twins and I will have to bring them with me and I'm nervous about how long it will take each time I go there. I would really appreciate your input. Do you find it terribly expensive? I'm sure its worth it though. Many thanks!

posted Mar 4th, 2013 4:17 am


I have been on optifast with Dr. Godlferb for six weeks now and so far I am extremely pleased. I lost 26 pounds and even though I miss the home cooking I no longer crave solid food. This program is great for anyone that is motivated to loose weight and get healthy.

posted Feb 27th, 2013 10:57 pm


I start Optifast on Jan. 17, 2013, so far I have lost 14ib in 13 days, its great, I hope it continue, so far no cheating, because after this drink I feel full, yes, I do miss the taste of food, but in-order to reach healty life style, not a big deal. I am 52 year old. So far very please with Dr. Goldferb services. Hoping to loose 100 Ib, and I was 303Ib.

posted Jan 30th, 2013 12:30 am


Hi my name is Zoe and I have been on optifast for 5 days and I have lost 2 kgs, I am very pleased with the product and loving it ..hate the soup yukkkk!! Love the new improved coffee ........and love the chic berry muesli bar yummy! So good luck guys I've got 7 kgs to lose in 12 days for pre op for gastric sleeve, I hope I get there, love optifast!!!!

posted Jan 29th, 2013 11:37 am


I've been on the Opti diet for 3 months, tomorrow. It's been pretty easy. The shakes are delicious. Keep me satisfied. So much so, that I sometime only have 3 shakes a day because I'm too full which is not good but there are always bad days, right? I've lost 53 lbs total thus far. I expected more, but to be honest, I've had 2 cheat days during the 3 months. I also sometimes snack on a small amount of Naturally More PNut Butter and Sunflower Seeds. I know Bad Bad Bad! I'm only human. I have 50lbs more to lose to be at my ideal 130lb weight. I know I can do it. This plan works. I didnt workout first 3 months too much, I am now doing the TurboFire now and spinning 5 days a week. I'm hoping it falls off even quicker now. Keep on carrying on... It works!

posted Jun 7th, 2012 4:01 am


I just wanted to leave a simple comment to state your web site was wonderful. I came across it on google search just after going through many other information that had been not really relevant. I thought I might find this much sooner thinking about how excellent the content is.

posted May 5th, 2012 11:39 am


I have been on Optifast diet for 4 days. I cheated and had 2 bits of a hambuger on the 3 day. I have only lost 5 pounds. how long after you cheap on this diet does it take our body to get back to ketosis? also does anyone know if their is another shake that compares to the optifast shake? the optifast shakes are to expensive for me to continue to purchase.

posted May 1st, 2012 6:16 pm

Lauren Redmond

I have been on the diet for 5 days now and I have lost a little over 10 lbs. I have to say the hardest part is giving up the foods I love, but I have not been hungry. Looking forward to seeing the results after a few more weeks.

posted Feb 21st, 2012 9:58 pm


Works great! It's not easy but the weight will fly off. Have lost 28lbs in just over one month and two weeks.

posted Feb 12th, 2012 3:42 am


I tried this diet 18 months ago. I was on the straight liquid diet and lost 47 lbs in 12 weeks. I have been able to keep the weight off. You have to be VERY discipline and don't cheat. Its too expensive not to give it 100%. My only regret is the "saggy" skin. It has taken me almost 15 months to get things toned up.

posted Jan 29th, 2012 9:45 pm


what can I do to make the shakes and bars taste better? today has been day 1 for me...and I honestly don't know how I'm going to do this for 3 months!! The shakes do not taste great and the bars are horrible! I haven't tried the soups yet, I don't even like tomato, so I hope they are better than the shakes and bars. I have younger kids so it was hard to make them their meals because they can eat regular food. I'm already feeling the craving for something real!!I know I need this and I'm willing to see how it works, just gonna need some motivation

posted Dec 24th, 2011 3:51 am

jan oye

l was on optifast and got very, very sick with migraines and heart palpitations, l found out 4 weeks later after l quit the diet,because of getting very ill, l had an abnormal EKG to begin with and my doctor that put me on the diet never even told me, l reqested my records, the EKG was taken the day the dr put me on the optifast diet, and he NEVER even told me l had an abnormal EKG, obviously he was in it for the money and not my well being. There will be consequences for him.Be sure to request seeing all your tests before starting the diet, none of mine were brought to my attention,l am extremely disappointed in that physician.

posted Dec 19th, 2011 1:48 pm


I have been on the Optifast 900 4 Shakes/Day plan for 8 days, and have lost 16 pounds. Mostly water, but I can honestly say I have not been hungry. The first 4 days were a challenge, but after that initial point I feel like I have gotten past the most difficult phase. I will now be switching out on shake per day for a meal consisting of 6oz Lean Protein, Low Glycemic Index Vegetables, and a Maximum of 20g of Carbohydrates. (Low Glycemic Index Carbs). So this will be more of a challenge in that I have to do some Nutrition Research to plan my meals.
Basically the Optifast program is set up to put you in a state of Ketosis, similar to an Atkins or No Carb Diet. This diet is not for everyone, and it is not easy or "normal". A box of shakes cost approximately $300.00 Canadian/month for 4 shakes per day.

posted Dec 8th, 2011 12:38 am


Hi, I too will be starting Optifast next week. My eating habits are so bad that I am looking forward to 3 shakes per day and 1 light meal. Good Luck to you.

posted Dec 1st, 2011 9:56 pm


Can I do the Opifast diet if there's no clinic in my area? I do not have an Optifast clinic in my area but I have read everything online & I am ready to try this diet.

posted Dec 1st, 2011 5:34 pm


Leave Feedback

Skip the moderation queue by becoming a MyDIR member.

Already a member?

Need to sign up?
It’s free and only it takes a minute.
There are two ways to join:

Or, proceed without an account