A women preparing an Optifast Dessert

Intensive Level

On this level you will replace 3 meals with OPTIFAST VLCD products. This level is designed for fast, effective weight loss.

Why choose this level?

This level is designed for fast, effective weight loss. This level is the Very Low Calorie Diet (VLCD) part of the OPTIFAST VLCD Program. Research has shown weight loss on the Intensive level averages 1.0 to 2.5kg / week with an average total weight loss of 20kg after 12 to 16 weeks1,2.

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Don't just take our word for it!

Learn more about Nicole's story to see the success of her diet plan.


I’m 7 weeks into the Intensive Level and I have lost 13.6kg! I have never EVER lasted this long, felt this energetic, lost so much and felt so motivated.

There is loads of self-talk (mindfulness) ALL DAY LONG to keep me positive, fight the urges and remind me of why I’m doing this, but it really has flown by and I am looking forward to shedding the next 26kg! It hasn’t taken much thought really, and that has really helped. I buy it, shake it, sip it and this has really helped lead me to success! A positive health outcome from losing weight is that my blood pressure has improved and I’m sleeping more soundly, not to mention that the person staring back at me in the mirror is now looking much happier!

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How does it work?

On the Intensive Level you will replace all 3 meals with OPTIFAST VLCD products. This level provides up to 800 calories per day and is designed for fast weight loss via a metabolic reaction called 'ketosis'. In addition to the 3 OPTIFAST VLCD products, you will also have:

  • At least 2 cups of low starch vegetables
  • 1 teaspoon of vegetable oil
  • 2 litres of water every day

IMPORTANT: Due to the energy restriction of under 800 calories per day, this Level is only to be followed by individuals with a BMI of 30kg/m2 or more, or 27-30kg/m2 with weight related co-morbidities such as diabetes, hypertension, high blood pressure, and high cholesterol. You must speak to your healthcare professional before commencing on the Intensive Level.

What is ketosis? See Allowed Foods List

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1. Delbridge, E. and J. Proietto, State of the science: VLED (Very Low Energy Diet) for obesity. Asia Pacific Journal Clinical Nutrition, 2006. 15 (Suppl): p. 49-54.
2. Mustajoki, P. and T. Pekkarinen, Very low energy diets in the treatment of obesity. Obesity Reviews, 2001. 2: p. 61-72.