FAQs
I feel like I have the flu after completing ProLon, is that normal?
Mild fatigue, headaches, and muscle aches are a normal part of fasting for many people (some call it keto-flu), especially the first time they complete a prolonged fast. However, symptoms generally resolve on the transition day. Please discuss any concerns about ongoing or persistent symptoms with your Health Care Provider. Read more...
Can I use ProLon with an existing health condition or disease?
If you have a medical condition, talk to your healthcare provider to determine your suitability for ProLon. If you do not have a provider, you can use our Healthcare Provider Locator to see if we have a provider near you. Read more...
Can I use ProLon with an existing health condition?
If you have a medical condition, talk to your healthcare provider to determine your suitability for ProLon. If you do not have a provider, you can use our Healthcare Provider Locator to see if we have a provider near you. Read more...
Will I experience acid reflux?
Acid reflux was not a commonly reported occurrence during the clinical trials for ProLon, but different people experience reflux for different reasons, and we cannot give medical advice or state anything about acid reflux and your potential experience with certainty. If you’re concerned about acid reflux, please check with your healthcare provider. Read more...
Does growth hormone spike after the 5 days of ProLon?
Some studies have demonstrated a significant increase in growth hormone during a prolonged water fast (typically in days 3 to 5), but the clinical studies on ProLon did not report growth hormone levels, so we can’t definitively say if the same impact occurs with ProLon. ProLon suppresses IGF-1 (insulin like growth factor 1), but the impact appears to be transient, and IGF-1 levels slowly return to their starting levels following ProLon use.   Read more...
Will ProLon impact my sleep?
Most of the data regarding the effect of fasting on sleep is anecdotal. However, in a survey of ProLon users, among healthy volunteers surveyed and reporting a difference in quality of sleep after using ProLon for the first time, the majority reported their sleep quality improved by the end of their fast. Read more...
Can I do a ProLon cycle while I’m menstruating?
None of our trials so far have studied the impact of ProLon on menstrual cycles, nor have we studied the optimal time to fast regarding female hormone levels. You can do a ProLon fast at any time during your menstrual cycle. However, based on studies that others have done on the impact of water fasting on female hormones, it may be optimal to take ProLon mid-cycle, during the luteal phase. Read more...
Do I have to wait to start ProLon after completing a round of antibiotics?
The impact of ProLon on antibiotics (or antibiotics on ProLon) has not been evaluated, but there do not appear to be any concerns with beginning ProLon 10-15 days after you have completed your course of antibiotics and symptoms have completely resolved. If you have any concerns, please check with your healthcare provider. Do not use ProLon if you have signs of an active infection, or are at risk for recurrent infections. Read more...
Do we have a recommended ketone range during ProLon?
We do not have a recommended ketone range during ProLon mainly because although ketone measurement can indicate physiological fasting, it is not a complete indication of fasting, and is not an indicator of the molecular (cellular) fasting which ProLon also triggers. While data on ketones was not collected in the clinical trials for ProLon, many people do reach full functional ketosis (1.5mmol/dL or greater) during the fast, though it may fluctuate during the diet. Many things can impact measured ketones in the blood stream or urine, so if you do... Read more...
Why do I feel constipated or bloated?
Any significant change in diet can lead to changes in the gut, which may contribute to feelings of bloating and gassiness. If you typically consume a high fiber diet, or a diet high in carbohydrates (which tend to draw water into the gut), you may become a bit constipated while using ProLon, and this can lead to bloating. Read more...
Can I do ProLon during platelet-rich-plasma therapy (PRP), stem cell therapy, other infusions like Remicade, or chelation therapy?
ProLon has not been evaluated in combination with any of these procedures. Please discuss with your healthcare provider, who may recommend waiting several days after finishing ProLon or any other low-calorie diet prior to any medical procedure, and waiting several days after any medical procedure to begin ProLon, as well as not using ProLon during any medical procedures. Additionally, all people with serious medical conditions should consult with their physician before any changes to diet or lifestyle, including use of ProLon. Read more...
Can I use ProLon if I am on a low-lectin diet?
Most people who follow a low-lectin diet try to omit lectins entirely, including legumes, nightshade vegetables, and certain grains. ProLon does contain lectins, however we believe the health benefits outweigh the concerns for most people, and most people tolerate ProLon well, without any side effects directly attributable to the lectins. It is ultimately up to you to determine if ProLon has too many lectins for your particular dietary needs. Unfortunately, there are no good substitutes for any of the items in the program at this time, but it may be possible... Read more...