OPTIFAST 800 Reviews: Does It Really Work As Advertised?

OPTIFAST 800 is a weight loss aid that helps to prevent more accumulation of fat by increasing the metabolism rate of the body offering you a slender body.

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In This Review

What is OPTIFAST 800?

Optifast liquid-based diet began in 1974 and the brain behind it was Novart, Medical Nutrition Corporation. The company brand was created by Nestle Health Sciences.

The program is aimed at people who would want to lose a significant amount of weight. It is also meant for people who are preparing for gastric bypass surgery. This program requires weekly counseling sessions and doctor supervision.

Optifast is claimed to be a completely different diet that needs to be reviewed with a different mindset. The program is claimed to be for those who are overweight. It is also claimed to benefit people who are preparing to go for weight loss surgery.

How Does OPTIFAST 800 Rate?

Overall Rating: 3.8

Value for Cost

3.8/5Value for Cost
Return Policy

3.7/5Return Policy


Brand Highlights

  • The brand has an imposing line of sports nutrition products.
  • OPTIFAST 800 uses clinically proven ingredients in its formulations.
  • They are committed to providing top-notch, original goods.
  • It is known for developing and releasing the most cutting-edge products.



*All individuals are unique. Your results can and will vary.

Key Ingredients

  • Soy Lecithin
  • Canola Oil
  • Vitamins B12, D3 and Minerals
  • Biotin
  • Ascorbic Acid
  • Cellulose Gel and Gum


  • It may support rapid weight reduction.
  • It provides psychological support.
  • It also offers nutritional support.
  • It may provide long-term results.
  • It is associated with easily prepared meals.


  • It offers a low-calorie diet and this might be difficult for others to follow.
  • It is not a traditional approach to weight loss.

How Does OPTIFAST 800 Work?

The formulation uses a combination of key ingredients designed to optimize fat loss. It contains the powerful stimulant Soy Lecithin which is substantially proven to stimulate thermogenesis in the body. This means it jumpstarts the fat-burning process for optimum fat loss.

It also increases energy levels while improving both the mental and physical performance of the user. The product also contains a natural testosterone booster that also helps promote fat loss.

It also helps increase lean muscle mass in the body which further supports the fat-burning process.

OPTIFAST 800 Ingredients – Are They Safe and Effective?

Soy Lecithin

Soy Lecithin has abilities to burn and emulsify fat. Ensures the liver is in a good condition to promote metabolism.

Canola Oil

As per Advances in Nutrition journal, Canola Oil has about 62% of monounsaturated fats and small amounts of alpha-linoleic acid  which is a component of the important omega-3 fatty acids. This ingredient is typically produced in China and India and is extracted from modified Brassica oil seeds. It supports the balancing of fats which could result in health risks caused by body weight and cholesterol[1].

Vitamins B12, D3 and Minerals

Vitamin D increases the ability of the body to absorb very crucial nutrients for weight loss like Calcium. Helps to prevent deficiencies that could be caused by a lack of dietary nutrition. It helps users to have a well-rounded diet.


Biotin is a fat-soluble vitamin that helps in the metabolism of nutrients specifically carbohydrates and fats[2].

Ascorbic Acid (Vitamin C)

Several studies have found that vitamin C (ascorbic acid) may help reduce weight loss. It aids in the improvement of digestive absorption[3].

Cellulose Gel and Gum

It is used as a laxative mainly for weight loss. It is used as a food-thickening agent.

Milk products (Calcium and Sodium Caseinate)

Some Optifast products contain milk protein concentrate which typically adds additional phosphorus, magnesium, and calcium.

Other ingredients include Potassium Citrate, Magnesium Chloride, Calcium Phosphate, and Copper Gluconate among others.

Read NextLeaner Creamer & Slim Guard



*All individuals are unique. Your results can and will vary.


Q: Where to Buy OPTIFAST 800?

A: OPTIFAST 800 is available for purchase on the official website as well as other online e-commerce sites like Amazon, and Walmart.

Q: How Long Before I See any Improvements?

A: According to the Optifast 800 shakes reviews, it takes a few weeks for you to start noticing the results. However, results may vary from one person to the other.

What Do the OPTIFAST 800 Reviews Say?

I’ve been using this product for quite some time, but it hasn’t worked for me. It would be better to switch to another product than to waste time and money on this one.
~ Bella



*All individuals are unique. Your results can and will vary.

OPTIFAST 800 Reviews – Conclusion

Optifast is deemed an effective weight loss product. It has been incorporated with healthy and nutritious ingredients that support healthy weight loss. This weight loss program is however associated with a low-calorie diet and this might be a little bit uncomfortable for some people.

As much as the program fails to offer a traditional approach to weight loss, it has ingredients that ensure rapid weight loss and long-term results. However, before considering this program, it would be important to consult a physician first.

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Dr Berg's Electrolyte Formula | Weight Loss Formula
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Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Consumer Health Digest. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer. *All individuals are unique. Your results can and will vary.

Customer Reviews for OPTIFAST 800 Shakes

OPTIFAST 800 Reviews: Does It Really Work As Advertised?

Customer Reviews & Ratings

1.0 out of 5

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  1. doreen angela king

    Optifast meal replacement diet
    The drinks on this plan have a disgusting taste. I bought both the vanilla and coffee and believe me they are awful. Will not buy this product again. Do not take anything vanilla or coffee.

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OPTIFAST 800 Shakes
Nestle Health Sciences
200 gm
Soy Lecithin, Canola Oil, Vitamins B12, D3 and Minerals, Biotin, Ascorbic Acid, and Cellulose Gel and Gum.

3 sources

We review published medical research in respected scientific journals to arrive at our conclusions about a product or health topic. This ensures the highest standard of scientific accuracy.

[1] The Effect of Canola Oil on Body Weight and Composition: A Systematic Review and Meta-Analysis of Randomized Controlled Clinical Trials: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6520036/
[2] Biotin – Vitamin B7: https://www.hsph.harvard.edu/nutritionsource/biotin-vitamin-b7/
[3] Vitamin C in the treatment and/or prevention of obesity: https://pubmed.ncbi.nlm.nih.gov/25866299/

**This is a subjective assessment based on the strength of the available informations and our estimation of efficacy.

*Result may vary. If you are pregnant, nursing, have a serious medical condition, or have a history of heart conditions we suggest consulting with a physician before using any supplement. The information contained in this website is provided for general informational purposes only. It is not intended to diagnose, treat, cure, or prevent any disease and should not be relied upon as a medical advice. Always consult your doctor before using any supplements.

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