Why stomach acid matters more than you think

I often see clients with symptoms such as bloating, reflux, food sensitivities, or ongoing digestive discomfort in clinic and stomach acid is rarely the first thing they think about. Yet stomach acid is one of the most important foundations of healthy digestion, I would go as far to say the gatekeeper!

Stomach acid or Hydrochloric acid (HCL) acts as the body’s first gatekeeper of digestion. It’s role goes far beyond breaking down food, it supports nutrient absorption, digestive signalling, gut microbiome health, and protection against harmful bacteria and pathogens.

When stomach acid levels are too low, digestion becomes compromised and can lead to a multitude of symptoms discussed below.

So what are the functions of HCL?

Healthy stomach acid is essential for:

• Breaking down proteins into amino acids

• Absorbing nutrients such as iron, zinc, magnesium, calcium, and vitamin B12

• Stimulating digestive enzymes and bile release

• Protecting against harmful microbes + opportunistic bacteria

• Supporting a healthy gut microbiome

Without enough stomach acid, food is not properly digested, which can contribute to bloating, gas, reflux, food sensitivities, nutrient deficiencies, fatigue, brain fog, brittle hair and nails, and flutuating bowel habits.

Common misunderstanding : Relux is caused by LOW stomach acid not HIGH

One of the biggest misconceptions in digestive health is that reflux or heartburn is always caused by too much stomach acid. While it’s actually often the opposite!

When stomach acid is low, food sits in the stomach longer and digestion slows. This can increase pressure in the stomach and contribute to reflux symptoms. However, many people are told they have excessive stomach acid and are prescribed proton pump inhibitors (PPIs), which work by suppressing acid production.

While PPIs can be necessary and beneficial in certain situations, especially short term, long-term use can further reduce stomach acid levels and exacerbate underlying digestive dysfunction.

Because stomach acid is essential for digestion and nutrient absorption, prolonged suppression may contribute to:

• Poor protein digestion

• Bloating and digestive discomfort

• Nutrient deficiencies (particularly B12, iron, magnesium, and zinc)

• Changes in the gut microbiome

• Increased susceptibility to gut infections + harmful bacteria

This doesn’t mean prescribed medications should be stopped abruptly, but rather that the underlying cause of digestive symptoms deserves deeper investigation! As PPI’s are working as a bandaid approach.

What suppresses HCL production?

Several factors can reduce stomach acid production over time, including:

• Chronic stress

• Eating too quickly

• Long-term antacid use

• Nutrient deficiencies

• Ageing

• Gut infections or inflammation

• Dysbiosis (microbial imbalance)

Stress is a major contributor, as digestion works best when the body is in a relaxed “rest and digest” state!

Simple Ways to Support Healthy Stomach Acid

• Apple cider vinegar in water 20–30 minutes before meals

• Warm lemon water in the morning

• Taking 3 deep belly breaths before eating

• Slowing down and eating mindfully

• Ginger, peppermint, or lemon teas

• Including bitter foods such as rocket, kale, broccoli, citrus, dandelion greens, green tea, and sour berries