Do you know these facts about saliva? Let's talk about it - Nirogi Lanka

Have you ever taken a moment to really think about the saliva in your mouth? Probably not, right? But did you know that saliva is a truly remarkable fluid that performs essential roles in your body? Whether you are speaking, eating, or savoring your favorite meal, saliva is indispensable. So, today at Nirogi Lanka, let’s take a detailed look at the science of saliva.

What is saliva? Simply put…

Saliva is a watery fluid secreted by the exocrine glands in your mouth, which we clinically refer to as your salivary glands. While it consists mostly of water, it is also packed with vital proteins, enzymes, and other components crucial to your physiological health.

Physicians often utilize saliva samples to gain insights into your overall health. For example, your saliva can be used to monitor your (cortisol) levels, conduct (drug tests), or even detect certain viral infections like (HIV). It is quite fascinating, isn't it?

What are the benefits of saliva to your body?

Saliva is much more than just a simple liquid. It plays a critical role in maintaining your oral health and contributes significantly to your general well-being. Let’s look at some of its key benefits:

It keeps your mouth and throat moist and comfortable

Saliva plays a crucial role in keeping the delicate membranes in your mouth (mucosae) moist, preventing them from sticking together. It also forms a protective barrier that shields your mouth from harmful substances like bacteria and toxins, while helping to prevent injuries.

Making Eating and Swallowing Easier

Imagine how difficult it would be to swallow dry food. Saliva moistens your food, turning it into a soft mass (bolus) so that it can easily slide down your throat (esophagus) and into your stomach. Without saliva, swallowing would be a real struggle.

Initiating the Digestive Process

Did you know that digestion actually begins in your mouth? Saliva contains a specialized enzyme called Amylase. This is what begins the breakdown of carbohydrates (such as rice or bread), giving your stomach a head start on digestion.

Protecting Against Infections

Saliva contains another essential enzyme called Lysozyme. This enzyme destroys many types of bacteria, acting as a natural guard that prevents germs from spreading in your mouth.

Protecting Your Teeth

Saliva is also a great protector of your teeth. The calcium hydroxyapatite in saliva helps prevent the loss of minerals from your teeth (demineralization). It also washes away leftover food particles and helps neutralize the acid from the foods you eat. Because of this, it significantly reduces your risk of cavities and gum disease.

Balancing Your Mouth's pH Level

Saliva helps maintain your mouth's pH level (a measure of acidity or alkalinity) between 6.0 and 7.5. Different foods have different pH levels, and saliva works to restore your mouth to a balanced state after you finish eating.

Aiding in Wound Healing

If you accidentally bite your cheek or sustain a small cut in your mouth, saliva helps it heal quickly. This is because saliva contains specific proteins and growth factors that assist in tissue regeneration and speed up wound healing.

Enhancing Your Sense of Taste

For you to taste food properly, it needs to be moist so that the molecules can reach the taste buds on your tongue. Saliva provides the essential moisture required for you to fully enjoy the flavors of your food.

Isn't it amazing how much work saliva does for your body? Even though it seems like a simple process, it plays a vital role in your daily health!

How and where is saliva produced?

As mentioned, saliva is produced by your salivary glands. These glands produce saliva and release it into your mouth through small channels called ducts.

We have three pairs of major salivary glands:

• Parotid glands: Located in front of your ears, near your cheeks, these are the largest salivary glands. The saliva they produce enters the mouth near your upper molars.
• Submandibular glands: Located in your lower jaw area, the saliva from these glands enters the mouth under your tongue.
• Sublingual glands: Located under your tongue on the floor of your mouth, these also release saliva into the area beneath your tongue.

About 90% of your total saliva comes from these three major gland pairs, with the remaining 10% coming from hundreds of smaller minor salivary glands throughout your mouth. On average, an adult produces between 0.5 to 1.5 liters (about 2 to 6 cups) of saliva every day.

How is saliva production controlled?

Saliva production is primarily managed by your Autonomic Nervous System (ANS), which controls involuntary bodily functions like breathing and heart rate, both while you are awake and asleep.

Two parts of the ANS influence saliva production:

• Sympathetic nervous system: This activates during emergency situations, especially when you feel stress or fear—the "fight-or-flight" response. This stimulation produces thick, sticky saliva, which is why your mouth feels dry when you are nervous or anxious.
• Parasympathetic nervous system: This functions as the opposite of the sympathetic system, managing "rest-and-digest" processes. When stimulated, it produces thin, watery saliva, which is perfect for eating and swallowing.

Typically, the parasympathetic nervous system has the most significant and long-term impact on your daily saliva production.

Are there other factors that affect saliva production?

Yes, several everyday factors and food choices influence it:

• Eating sour foods triggers the salivary glands to produce more saliva to dilute the acid, helping to protect your teeth and digestive system.
• Thinking about or anticipating your favorite food can also make your mouth water.
• Your salivary glands are most active during the day. Saliva flow decreases significantly at night, which researchers believe is linked to your body's natural circadian rhythm.

What is saliva made of?

Saliva is 99% water. The remaining 1% consists of proteins, electrolytes, and other substances.

Researchers have identified over 1,000 types of proteins in saliva, though only about 10% are highly abundant. These proteins are complex, large molecules that perform critical cellular functions. Some of the main types of proteins found in saliva include:

• Amylase: As we discussed earlier, this is an enzyme that helps break down carbohydrates. It is primarily produced by your pancreas and salivary glands.
• Proline-rich peptides (PRPs): These are a large family of salivary proteins produced by the parotid and submandibular glands. They make up about 70% of the total protein in your saliva. For example, acidic PRPs help form a protective film called the “pellicle” over your tooth surfaces.
• Host-defense peptides: These are a vital part of your immune system, playing a key role in fighting off infections and inflammation.
• Mucins: These large proteins are what give saliva its lubricating quality, keeping your tongue and gums moist. They also act as a physical barrier to protect you from harmful bacteria, fungi, and viruses.
• Secretory IgA: This is a type of antibody. Its job is to bind to and control both harmful pathogens and the beneficial commensal microbes living in your mouth, serving as an essential part of your body's defense system.

In addition to these, your saliva contains several other organic components:

• Glucose (sugar)
• Urea (a waste product)
• Cortisol (the “stress hormone”)
• Sex hormones (e.g., estrogen, testosterone)
• Substances specific to your blood type.

What are common saliva-related health issues?

Certain medical conditions and treatments—such as specific medications or radiation therapy—can impact both the quantity and quality of your saliva.

The two primary concerns are hyposalivation (too little saliva) and hypersalivation (too much saliva). Of the two, reduced saliva is more common. Both conditions can be either temporary or chronic.

Hyposalivation

This occurs when your salivary glands do not produce enough saliva. This is medically known as xerostomia, or more commonly, dry mouth.

What happens when you have low saliva?

A lack of saliva can lead to several challenges:

• Bad breath (halitosis)
• Discomfort in your mouth and throat
• Oral health issues: increased cavities, tooth decay, and other infections
• Difficulty for those wearing dentures
• Trouble speaking or swallowing

Why does saliva decrease?

Dehydration is a major cause. Other factors include:

• Autoimmune conditions: such as Sjögren’s syndrome, lupus, or rheumatoid arthritis.
• Viral infections: such as HIV or hepatitis C.
• Uncontrolled Diabetes Mellitus: chronically high blood sugar levels can lead to dehydration.
• Alzheimer’s disease.
• Hypertension.

Furthermore, dry mouth is a potential side effect of over 500 different medications. Commonly implicated drugs include:

• Antianxiety medications and antidepressants.
• Anticholinergics: often used for urinary incontinence, overactive bladder, or COPD.
• Antihistamines, decongestants, and certain pain relievers.
• Some antihypertensives, such as beta-blockers.
• Chemotherapy drugs.
• Medications for Parkinson’s disease.

Radiation therapy for head and neck cancers is also a leading cause of reduced saliva production.

Hypersalivation

This condition, known as sialorrhea, occurs when your salivary glands produce an excessive amount of saliva, which may lead to drooling. However, drooling doesn't always mean you are overproducing saliva; it can sometimes result from muscle weakness in the mouth or throat. This is also why young children may drool.

What happens when you have excessive saliva?

Persistent or severe drooling can cause health issues, such as angular cheilitis, a skin condition causing painful cracks at the corners of your mouth. In rare, severe cases, excessive saliva can be aspirated into the airway, potentially causing choking or aspiration pneumonia.

Why does saliva increase?

Certain medications, particularly antipsychotics like Clozapine, can cause hypersalivation as a side effect.

Additionally, these conditions may lead to increased saliva:

• Untreated tooth decay: Cavities increase bacterial levels in your mouth, which can stimulate your salivary glands to produce more saliva to cleanse the area.
• Gastroesophageal reflux disease (GERD): When stomach acid flows back into your esophagus, your salivary glands may produce extra saliva as a protective mechanism to neutralize the acid.
• Nausea: When you feel nauseous, your glands produce extra saliva to protect your mouth from stomach acid during vomiting.
• Pregnancy: Saliva levels can temporarily increase during pregnancy due to hormonal stimulation or as a response to morning sickness.

When should you see a doctor regarding saliva concerns?

If you are experiencing persistent dry mouth or excessive drooling, it is important to consult your doctor. They can evaluate your symptoms, order necessary tests to determine the root cause, and recommend the most effective treatment for you, brought to you by Nirogi Lanka. If you experience severe breathing difficulties or choking, please seek emergency care at the nearest hospital or call 911 immediately.

Why does my saliva feel thick?

Saliva often feels thick or sticky when it lacks sufficient water content. Sometimes, the presence of mucus mixed with saliva can also contribute to this “thick” or “sticky” sensation.

This can be caused by several factors, including dehydration, smoking, or chronic allergies. The most effective way to improve the consistency of your saliva is to stay well-hydrated by drinking plenty of water. However, if you find that your saliva remains thick persistently, it is a good idea to consult a doctor. There may be an underlying condition that requires medical attention.

Final Thoughts: Key Takeaways

Under normal circumstances, we rarely give much thought to saliva unless there is an noticeable increase or decrease in production. Yet, it is an essential, hard-working fluid vital to your overall health. If you have any concerns or doubts about your saliva or your oral health, do not hesitate to speak with your doctor. They are there to support and assist you.

A healthy mouth is a great starting point for a healthy body! Don't underestimate the importance of your saliva.

Keywords: Saliva, Salivary Glands, Oral Health, Dry Mouth, Excessive Salivation, Digestion