It's not true for every constipation...some have good appetite despite of severe constipation but still many face indigestion or less hunger due to constipation. Gas is one of the reason. Constipation leads to accumulation of waste, which is a toxin for body and liver also plays important role in detoxification of body plus second stage metabolism in blood.. So during constipation load on liver increases...hence liver job for 2nd stage digestion becomes weak which will have impact on git level digestion i.e., digestion taking place in stomach and intestine. Generally in such cases there is a complain of fatty liver also

When the out put is not good or correct how your input will correct Try chitrakadi vati for ama pachan for 3-5 days on empty stomach before food And Gandharv Hastadi tail to clean your intestines and for constipation

Consult ayurveda physician for proper diagnosis and root cause of ailment

Age 38 Change your diet menu N Life style Do some special yoga If u want best n permanent solution

Yes it because constipation