FORBIDDEN ARTICLES OF FOOD:

Blood:

Ingested blood on reaching the intestine is acted upon by various bacteria normally present there resulting in poisonous products like ammonia which is toxic to the liver. Therefore, God has forbidden us to eat or drink blood and has prescribed such a method for slaughtering animals that most of their blood is shed.

Pork:
There are two harmful worms harboured by pigs, one is "TAENIASOLIUM" which on ingestion passes to the brain and causes epilepsy. The other one is "TRICHINELLASPIRALIS" which passes to the muscles and brain causing muscular swelling and pain and also epilepsy. Pork has more fat and cholesterol than any other meat.

Alcohol:

Numerous diseases have been attributed to alcohol like dyspeptic trouble, peptic ulceration, cancer stomach, pancreatitus, cirrhosis liver, vitamin deficiency and coronary heart disease.

CIRCUMCISION:

One of the criteria of Islam is that every Muslim men should be circumcised. This is medically suggested nowadays as a toxic substance called Smegma may collect under the redundant skin causing cancer of the genitalia in both man and his wife, inflammation of the penis, phthisis, sticking of the redundant skin over the urethral opening leading to difficulty in urination.

WASHING AFTER DEFECATION:

This beneficial habit saves us from Pilonidal sinus which is an abscess with hair inside occurring near anal opening.

Pylonephritis: This is more in women due to the proximity of the urethral opening to the anus so toilet paper while being used may bring germs like E. coli to the urethra.

ABLUTION:

A prerequisite of prayers yet one of the most hygienic procedure as it usually keeps the exposed parts of our body clean and also the parts of entry like mouth and nose thus avoiding infection.

PREVENTION OF INFECTION:

Infection may be transmitted through dirty hands or dirty food. Hands: It is essential to wash our hands before and after meals. Our blessed Prophet told us:
"It is a blessing to wash your hands before and after meals."

He has also advised us not to clean our hands with a towel before meals as they may convey infection from one person to the other particularly viral diseases like infective hepatitis or bacterial infection like Typhoid dysentries and cholera.

Or Prophet said:
"Whosover gets up from slumber should not dip his hand in any utensil unless he washes them three times, who knows what things he has been touching during sleep."

ARTICLES OF BEVERAGES:

These articles should be handled with great care. If the food is in open utensil they should be covered to avoid contamination. Stressing this our Prophet said "Cover up the utensils and tie the mouth of the water skins." He said, "Why did you not cover the utensil carrying the milk even if - it was with a piece of wood." (Bokhari, Muslim)

DENTAL HYGIENE:

Particular stress has been laid by our Prophet on this as it is very important in the prevention of disease. He attached great importance to "Miswak" a twig of a tree used for brushing teeth. "If I had not thought this to be an unbearable hardship for my followers I would have prescribed the use of Miswak before every prayer."

According to modern dentistry the best method of using a tooth brush is up and down the length of the teeth and this exactly the way our Prophet used his tooth brush.

KHILLALA:

The blessed Prophet said "Whosoever eats should pick bits and pieces from in between his teeth." It is beneficial act so that those do not rot and produce disease.

Source: islamic-world.net