Protinex and threptin are high protein products and I see no reason in what complications you have mentioned. Please have the drink as per label recommendations for your age and requirement once a day and the biscuits at any other time, 2 nos, to maximum 4 nos per day. Continue this for six months, check your weight regularly and consult a general physician and get a blood profile (protein status) check after that time for being on the safe side.