This is a video by Dr Berg about the side effects of Intermittent Fasting.
Non-diabetic Hypoglycemia is a possible side-effect of a low-carbohydrate or low-calorie diet – but when you use Intermittent Fasting and get your body into fat-burning mode, you should be unlikely to get it – I think I had it a bit once, but it might have been postural hypotension, see this video re Non-diabetic Hypoglycemia:
Water fasting is not eating, and drinking nothing but water (or e.g. green tea) (under medical supervision)... normally up to 21 days. Someone water-fasted 382 days, under medical supervision, and had mineral supplements.
Contra-indications and cautions for longer fasts:
(Found by MissisB on Dr, Mindy Pelz’s website):
“Before starting any diet, you should speak to your doctor. You must not rely on the information on this website as an alternative to medical advice from your doctor or other professional healthcare provider. If you have any specific questions about any medical matter, you should consult your doctor or other professional healthcare provider.
If you think you may be suffering from any medical condition, you should seek immediate medical attention.
Longer fasts are not recommended for the following:
People who are underweight or have an eating disorder
Type 1 diabetics and diabetics taking medication for their diabetes (other than Metformin)
Pregnant women or breastfeeding mothers
People recovering from surgery
Those who are frail or have a significant underlying medical condition should speak to their doctor first, as they would before embarking on any weight-loss regime.
Those who are not sure about whether it may affect their prescribed medications should speak to their doctor first.
People feeling unwell or have a fever (Hippocrates said "If you eat while you are ill, you nearly feed your sickness).
Those taking Warfarin should consult their doctor first as it may increase their INR.
People with a history of serious mental health problems.
You should never delay seeking medical advice, disregard medical advice or discontinue medical treatment because of information on this website.”
It seems strange that she does not mention adolescents.
My INR decreased, and I was taking 1mg/day more Warfarin - now I am on Eliquis.
Here is a poll asking members which health conditions they consider should make one cautious in fasting:
Why do they rank the Keto diet worst for health?
Members badges for those who are at high risk from the Coronavirus and or are 70+