FAQs

general-information · q-011 ·
What is the purpose of the L-Drink?
The purpose of the glycerin in the L-Drink is to provide the body with an alternate energy source to use instead of lean body mass during days 2-5 of the fast. So, the L-Drink helps protect your lean body mass...
food-sensitivites-and-prolon-ingredients ·
I'm sensitive or allergic to certain food. Can I still do ProLon®?
We can’t predict how everyone will respond to the program, or to a particular ingredient in the food. If you're concerned, you should discuss your food sensitivities with a healthcare provider before starting.   ProLon contains nuts, celeriac/celery, oats, and...
food-sensitivites-and-prolon-ingredients ·
Are all of the components of ProLon considered organic?
ProLon contains some products that are made with organic ingredients, but they are not certified organic.
food-sensitivites-and-prolon-ingredients ·
Is ProLon gluten-free?
ProLon is free of gluten-containing ingredients. Any individual with a medical condition (such as Celiac Disease) should consult and work with their health care team to establish suitability. ProLon is composed of various different food items, which are gluten-free. L-Nutra...
food-sensitivites-and-prolon-ingredients ·
Does ProLon® contain gluten or ingredients from Genetically Modified Organisms (GMOs)?
L-Nutra is working to ensure all of our products are and remain GMO-free. Please read nutrition information for more on potential food allergens.
food-sensitivites-and-prolon-ingredients ·
Is there soy in ProLon?
ProLon is not formulated or designed with soy ingredients with the exception of the soy lecithin found in the Algal Oil soft gel.
food-sensitivites-and-prolon-ingredients ·
Is ProLon manufactured in facilities which also process soy?
There is no soy in the product in the US market. Some of the ProLon foods are manufactured in facilities which process other foods containing soy. However, these facilities follow or exceed the current Good Manufacturing Practices (cGMPs) which ensure...
food-sensitivites-and-prolon-ingredients ·
Are the foods sweetened with Stevia?
No, ProLon does not contain Stevia.
food-sensitivites-and-prolon-ingredients ·
Can eating nutritional yeast give you brain fog?
There are several different factors that contribute to brain fog during fasting or FMD, and many people experience it at some point during any low-calorie or ketogenic diet. The nutritional yeast in the diet is glutamic acid, and is used...
food-sensitivites-and-prolon-ingredients ·
Is there wheat in the product?
ProLon is not formulated or designed with any ingredients containing wheat, but some of the products are made in places that also process wheat. If you have a severe allergy to wheat, please consult with your healthcare professional and read...
food-sensitivites-and-prolon-ingredients ·
Is the gelatin capsule vegan?
The gelatin capsule is vegan. At this time are currently transitioning so the capsule also contains only vegan ingredients.
food-sensitivites-and-prolon-ingredients ·
Is ProLon certified as Halal?
Yes, ProLon is certified as halal.
food-sensitivites-and-prolon-ingredients ·
Is ProLon kosher?
We are currently working on kosher certification for ProLon.
food-sensitivites-and-prolon-ingredients ·
Is ProLon suitable for vegans or vegetarians?
Soups in both versions of ProLon, both Original and Soup Variety 2, are suitable for vegetarians. The L-Bar, which is consumed daily as part of the ProLon program, contains honey, which may not be suitable for vegans. We are currently...
food-sensitivites-and-prolon-ingredients ·
Are the nuts and grains sprouted?
No.
food-sensitivites-and-prolon-ingredients ·
Are there preservatives in your products?
Preservatives are required in many food products to keep them stable during shipping and storage at room temperature until use. We use the minimum amount of preservatives necessary to maintain quality and freshness, and we use natural preservatives wherever possible....
food-sensitivites-and-prolon-ingredients ·
Salt content in ProLon:
The sodium content varies slightly between the days, ranging between 1.7 and 1.9 grams per day. This amount meets the criteria for the American Heart Association’s recommended daily salt intake for a heart-healthy diet.  Sodium helps your body hold onto...
food-sensitivites-and-prolon-ingredients ·
Do the rolled oats in the product have gluten?
The rolled oats do not have any gluten in them, although the protein found in oats is similar to gluten. There is no gluten in any of the foods included in ProLon, but some of the products are made in...
food-sensitivites-and-prolon-ingredients ·
Is the sunflower oil in the kale crackers hydrogenated or not?
The sunflower oil in the kale crackers is NOT hydrogenated.
general-information · q-005 ·
What is intermittent fasting (IF)?
Intermittent fasting can be defined as fasting for less than 2 days. Time-restricted eating, the 5:2 diet, and alternate day fasting are all included under the umbrella term of IF (see also the TRE question and answer below). While there...
eating-during-the-prolon-5-day-fast ·
What if I forget to eat something in the box or miss taking a supplement?
The ProLon® diet has been carefully curated and scientifically tested to be consumed as packaged. Therefore, we recommend eating all foods in each day's box. If there is any leftover food, or you forget to take a supplement, do not...