Slim Fast FAQs

Slim Fast is a global weight loss brand with amazing products to support your metabolism and help you achieve your weight loss goals. They have amazing powders, drinks, meal replacements and so much more! All designed to give you the necessary vitamins and minerals you need, and high in protein.

Naturally, no one's weight loss journey is the same and you will have questions. Here are some frequently asked questions our customers have about using Slim Fast.

Can I use the Slim Fast 3-2-1 diet on a long term basis?

Yes. You can safely follow this diet over a longer period of time if you wish to lose weight or keep your weight down. This diet should not be followed by individuals who need to gain weight.

The Slim Fast diet was made to meet the nutritional needs of adults who need to lose weight. Children have different nutritional needs and it is important for them to have a healthy diet, sufficient sleep, and regular exercise. If you think your child needs to lose weight try helping them with a healthier diet or encouraging them to have more regular exercise. You can also consult your doctor for advice about a good diet and exercise program.

Is the Slim Fast diet safe for diabetics?

If you have Type 2 Diabetes and are overweight you may benefit from the Slim Fast diet. However, you should not start on sudden diets without first consulting your doctor regarding your condition and any medications that you may need to help your weight loss. If you are Type 1 Diabetes, first discuss your weight loss plan with your doctor as your dosage of insulin may need to be adjusted as your weight reduces.

Is it safe to use medications while following the Slim Fast diet plan?

It’s always best to consult your doctor about a new weight loss diet when on medications. Your dosage may need to be changed.

Will Slim Fast cause headaches?

Weight loss, in general, can have a number of mild side effects some of which are dizziness, headaches, and feeling cold. These side effects normally do not last long, and headaches and dizziness can be calmed by drinking sufficient water.

Will Slim Fast cause problems with flatulence, constipation, and diarrhoea?

Following the Slim Fast diet will not cause such side effects. However, if you do have any side effects, it’s important to rule out any possible causes of lactose intolerance. Slim Fast products are also high in fibre and may cause flatulence in people who are not used to high fibre intake. If this happens with you, introduce Slim Fast products gradually, rather than immediately swapping your diet.

Can I use Slim Fast products while breastfeeding?

Breastfeeding uses up a lot of calories in your body, and your baby will need an average of 500 calories from your body on a daily basis. During breastfeeding your body needs all the nutrition you can get during this time.

Can I follow the Slim Fast diet when pregnant?

Pregnancy generally requires you to have a higher level of nutrition than normal. However, in some cases, women become too heavy during pregnancy and this can cause health problems. If you want to follow any weight maintaining diets during pregnancy, consult your doctor first.

Can I really get balanced nutrition from the SlimFast 3,2,1 Plan?

Yes! When you combine 2 SlimFast meal replacements, 2 to 3 healthy snacks (under 100 calories), and a sensible third meal of 600 calories, you can get all the daily nutrition you need whilst losing weight. The SlimFast 3,2,1 Plan provides 1200 to 1400 calories per day, which is a safe and effective level for weight loss. Each SlimFast meal replacement gives you a third of your daily nutrition.

Is the SlimFast 3,2,1 Plan suitable for everyone to follow?

If you need to lose more than 20% of your body weight (have a BMI over 30), are taking any medication or are under 18 years of age, then you must see your doctor to discuss your weight loss plans.

What is the BMI, and how is it calculated?

The Body Mass Index (BMI) is used to provide a good estimate as to whether someone is a healthy weight for their height. BMI is defined as the weight in kilograms divided by the square of the height in meters (kg/m²). A healthy BMI is 18.5-24.9. A BMI over 25 is defined as overweight, and over 30 is defined as obese.

Can I safely follow the SlimFast 3,2,1 Plan on a long-term basis?

Yes, you can safely follow the SlimFast 3,2,1 Plan on a long-term basis. You can remain on the SlimFast 3,2,1 Plan until you reach your target weight. However, you should never diet below a body mass index (BMI) of 18.5. SlimFast meal replacement products are formulated in line with National and European legislation to meet the highest nutritional standards. When weight loss is achieved, and you are just trying to maintain your weight this can be achieved by just replacing one meal per day, and this can be done for as long as someone desires. Remember that for every 1 stone (14lbs) of weight loss, you need to eat 150 calories less each day to maintain your reduced body weight.

What types of exercise are best to do whilst following the SlimFast 3,2,1 Plan?

Any exercise will help you lose weight. Exercise doesn't have to be strenuous or lengthy to be beneficial. Walking is one of the most effective exercises and almost anyone can do it! Ideally, you should be aiming to do at least 30 minutes of moderately intense physical activity per day, as your fitness improves then aim to accumulate at least 60 minutes of daily physical activity. Swimming, cycling, and dancing are also great forms of exercise that do not need to be performed in a gym. If you are new to exercise or have any existing medical problems it is advised that you should check with your doctor before starting any type of exercise programme.

Once I lose weight, how do I keep it off?

For every stone lost you need to eat 150 calories less per day - always. Tactics for weight management include healthy eating and regular physical activity. Continue to replace one meal a day with a Slim·Fast shake, and eat sensibly for the remaining two meals, including 1-2 low-fat snacks. In addition research shows that people who include physical activity in their daily routine are more likely to keep the weight off. Moderate activity, such as 30 minutes of walking or cycling will help you to maintain your weight. Weigh yourself regularly. If you gain a few pounds, restart the Slim·Fast 3·2·1 Plan, until the unwanted pounds are lost. Then, enjoy Slim·Fast everyday to help you stay healthy, fit and energetic.

Can my child have SlimFast to lose weight?

SlimFast meal replacements have been developed to meet adult nutritional needs. Children and young people, especially pre-puberty, have special nutritional needs. However, it is also important for children to keep a healthy weight, so if you think your child needs to lose weight you should consult your doctor for advice about a sensible diet and exercise programme.

I am diabetic, is the SlimFat 3,2,1 Plan safe for me to use?

If you have Type 2 Diabetes and are overweight then you will almost certainly benefit from weight loss. However, you should not start a programme like the SlimFast 3,2,1 plan without first consulting your doctor, as your diabetic condition and any medication that you may be taking will need continuous monitoring and adjustment while you lose weight. If you are a Type 1 Diabetic (requiring insulin), this is a serious medical condition, and you must first discuss your weight loss plan with your doctor as your dosage of insulin may need to be adjusted as your weight reduces.

Can people on medication follow the SlimFast 3,2,1 Plan?

Whatever medication you take, for whatever condition, your doctor is likely to need to change the dose if you lose weight because of the metabolic changes that take place as you lose weight, some of which may make adjustment of medication important. Therefore, you should not use SlimFast or any weight loss programme if you are taking medication prescribed by your doctor, without first consulting your doctor.

If I am pregnant, can I still follow the SlimFast 3,2,1 Plan?

While some women become too heavy during pregnancy, which can create health problems. In these cases, SlimFast would be acceptable, but such advice should only come from a health professional. Pregnancy requires a very high level of nutrition, so you should never consider SlimFast or any weight loss programme without discussing the plan with your doctor.

Launched over 50 years ago, Slim Fast has since innovated the industry and is a fantastic weight loss brand you can trust. Easy to prepare! Nutritious and delicious! Check out our Slim Fast products today!