Still not feeling right, even after doing the basics? You’re not alone, and it’s not in your head. Sometimes one more piece of the picture helps show why.
Why stomach acid matters
If you feel bloated after meals or full after only a few bites, low stomach acid may be part of the picture. Stress, age, and low levels of the minerals and nutrients needed to make stomach acid can all reduce how much your body produces.
When acid runs low, food sits in the stomach longer, protein is harder to break down, and minerals and vitamins like iron, zinc, and B12 are harder to absorb. That can show up as bloating, burping, food that “sits like a rock,” heartburn, or bad breath.
The HCl challenge is a simple, step-by-step way to find out whether a little extra stomach acid helps you, and how much. It starts at a very low dose and increases slowly, so your own body tells you where to stop. Barbie uses this same method with the people she works with at New Leaf Health.
Who should NOT do this challenge
Adding acid to a stomach that is already irritated can cause real harm. Do not start the HCl challenge if any of these apply to you:
- You have a known or suspected stomach ulcer, or a history of ulcers
- You have gastritis, or a burning stomach that feels better when you eat
- You have active reflux or heartburn that has not been evaluated
- You take NSAIDs regularly, such as ibuprofen (Advil, Motrin), naproxen (Aleve), or aspirin
- You take steroid medications, such as prednisone
- You take acid reducers, such as omeprazole (Prilosec), esomeprazole (Nexium), pantoprazole, famotidine (Pepcid), or daily antacids
- You are pregnant or breastfeeding
- You have tested positive for H. pylori and have not yet been treated
- Apple cider vinegar before meals causes you stomach pain
If you take any prescription medication, check with your prescriber before starting. Never stop a prescribed acid reducer on your own to make room for this challenge.
If any of the above fits you, the stomach lining usually needs support first. That is a conversation to have with a practitioner rather than a do-it-yourself project.
What you need
- Hydro-Zyme by Biotics Research. Each tablet contains about 150 mg of betaine hydrochloride (HCl), a low starting dose that makes it well suited to this challenge. It also contains pancreatin, a digestive enzyme.
- Baking soda and/or a chewable calcium supplement (or Tums), kept on hand in case of discomfort. You will rarely need them.
- Meals that include animal protein, such as meat, poultry, fish, or eggs. The challenge is done only at these meals.
- A simple notebook or a note on your phone to track the day, the number of tablets, and how you felt.
The challenge, step by step
Download & print the HCl Challenge handout (PDF) Keep the steps and table handy at meals.
- Start with 1 tablet. Take 1 Hydro-Zyme tablet (about 150 mg betaine HCl) between the middle and the end of each meal that contains animal protein. If a meal has no animal protein, skip the tablet for that meal.
- Pay attention for about 10 minutes after the tablet. You are watching for a mild change: a slight feeling of warmth in your stomach, more bloating, a gurgling feeling, or a bit of an acid feeling in your throat.
- If you feel nothing, stay at that dose for 3 days. Then increase by 1 tablet per meal, and keep adding 1 tablet per meal every 3 days, as in the table below.
| Days | Hydro-Zyme tablets per protein meal |
|---|---|
| Days 1–3 | 1 tablet |
| Days 4–6 | 2 tablets |
| Days 7–9 | 3 tablets |
| Days 10–12 | 4 tablets |
| Days 13–15 | 5 tablets |
- Know your stopping point. Stop increasing the first time you notice one of the mild changes in step 2. Your working dose is the last dose that felt comfortable. For example, if you first feel warmth on 4 tablets, your dose is 3 tablets per meal.
- Back down by 1 if you went past it. Drop back to your last comfortable dose at the next meal and stay there. Eating a few more bites of food at that meal helps use up the extra acid and ease the discomfort.
- Read the timing of the warmth. Warmth within about 5 minutes of the tablet means the dose is too high, so reduce by 1 tablet per meal. Warmth 30 minutes or more after the meal usually means the dose is not quite enough, so increase by 1 tablet per meal.
- Match the dose to the meal. A meal with less animal protein usually needs fewer tablets. A large protein meal may need your full dose.
- Stay on your working dose and keep checking in. As your digestion improves, your body begins making more of its own acid. When warmth or discomfort shows up at a dose that used to feel fine, that is your signal to drop down by 1 tablet per meal. Over time, many people need less and less.
- Limit Hydro-Zyme to about 3 months. Because it contains pancreatin, Barbie recommends using Hydro-Zyme for about 3 months at most.
- If you reach 5 tablets with no change at all, you likely need more acid than Hydro-Zyme can comfortably provide. The next step is usually a standard betaine HCl formula with 500–700 mg per capsule. Barbie recommends making that switch with the guidance of a practitioner rather than on your own.
Important: if you feel discomfort within 5 minutes of your very first tablet, stop the challenge. This usually means your stomach lining needs support first, or that your acid levels are already adequate.
If you feel burning or discomfort
Most people only notice mild warmth, which passes on its own. If the feeling is stronger than mild, any one of these will help neutralize the extra acid:
- Baking soda: stir 1 teaspoon of baking soda into 4 oz of room-temperature water and sip it.
- Calcium: chew 2–3 calcium supplement tablets and swallow with a small amount of water.
- Antacid: take an over-the-counter antacid such as Tums, following the label.
Only one of these is needed. Then return to your last comfortable dose at your next protein meal.
When to stop and call a provider
Stop taking Hydro-Zyme and contact your healthcare provider if you notice any of the following:
- Burning or pain that does not ease with baking soda, calcium, or an antacid
- Stomach pain that lasts for hours or keeps returning between meals
- Discomfort within 5 minutes of your very first tablet
- Nausea or vomiting
- Black, tarry, or bloody stools
Seek emergency care right away for vomiting blood or material that looks like coffee grounds, severe or sudden abdominal pain, chest pain, or trouble swallowing.
Also talk with a provider if your bloating or fullness has not improved after working through the challenge, or if you have unexplained weight loss or ongoing digestive symptoms. These deserve a closer look.
A final word from New Leaf Health
Stomach acid is one piece of a larger picture. Making enough acid depends on minerals such as zinc and sodium, and on a nervous system that is calm enough to digest. If bloating or early fullness keeps coming back, Barbie looks at the whole pattern with an HTMA (hair tissue mineral analysis) and a full intake to find what is driving it. Read more in Eating Well but Still Bloated?
This page is for educational purposes only. It is not medical advice and is not intended to diagnose, treat, cure, or prevent any disease. The amounts here come from Barbie’s own HCl challenge handout. Barbie Fisher is a certified HTMA practitioner and health coach, not a medical doctor. Talk with your healthcare provider before starting any new supplement, especially if you have a health condition or take medication.