The Alkaline Body — Bicarbonate, CO2 & Why Your Bath Could Change Everything

"Inflammation will not manifest in an alkaline milieu." — Dr. Konrad Werthmann

What Is Bicarbonate of Soda — And Why Does It Matter?

Bicarbonate of soda (sodium bicarbonate) is one of the most underrated compounds in human health. It's sitting in your kitchen cupboard right now, and most people have no idea what it's capable of.

Your body produces bicarbonate naturally as part of its acid-base regulation system. It is the primary buffer that keeps your blood pH in the narrow range required for life. When bicarbonate levels drop — through stress, poor diet, chronic inflammation, or ageing — the body becomes increasingly acidic, and disease finds fertile ground.

The Science: What Happens When You Drink Bicarbonate?

Researchers at Augusta University found that drinking a sodium bicarbonate solution does something remarkable — it signals the spleen to stand down from unnecessary inflammatory immune responses.

The spleen, sitting alongside the stomach, essentially reads the bicarbonate signal as "this is food, not a bacterial invasion" — shifting immune cells from pro-inflammatory M1 macrophages to anti-inflammatory M2 macrophages. The result? A measurable reduction in systemic inflammation.

"It's most likely a hamburger, not a bacterial infection" is basically the message the bicarbonate sends, says Dr. Paul O'Connor, renal physiologist at Augusta University.

Clinical trials have also confirmed that a daily dose of bicarbonate can slow the progression of chronic kidney disease — it is now an offered therapy for kidney patients.

CO2 — The Forgotten Molecule

Most people think of CO2 as a waste gas. Ray Peat's research tells a very different story.

CO2 is not simply a byproduct of metabolism — it is an active regulator of cellular function. Adequate CO2:

• Maintains the Bohr effect — allowing haemoglobin to release oxygen to tissues efficiently
• Relaxes smooth muscle — reducing vascular resistance and blood pressure
• Stabilises mast cells — reducing histamine release and allergic responses
• Supports mitochondrial function — the engine of cellular energy production
• Acts as a natural anti-inflammatory at the cellular level

When CO2 is low (as in hyperventilation, chronic stress, or poor metabolic function), tissues become relatively hypoxic even when blood oxygen appears normal. This is a key driver of fatigue, brain fog, pain, and inflammatory conditions.

Bicarbonate of soda, when combined with an acid (like citric acid), releases CO2 directly — which is exactly what makes the therapeutic bath protocol so powerful.

The Arthritis Bath Protocol — Your Supermarket Shopping List

This is one of the most effective and affordable things an arthritis sufferer can do. Everything you need is at your local supermarket — no prescription, no specialist, no expensive supplements.

What you need:

• Epsom salts (magnesium sulphate) — laundry aisle
• Bicarbonate of soda (baking soda) — baking aisle
• Citric acid — baking aisle
• MSM (methylsulfonylmethane) — health/medicine aisle, small bag
• Magnesium chloride flakes (optional but excellent — health food store or online)

How to do it:

1. Run a hot bath — as hot as you can comfortably tolerate
2. Add a generous handful of Epsom salts, magnesium chloride flakes, MSM, and bicarbonate of soda
3. Once you're in the bath, add the citric acid — this reacts with the bicarbonate to release CO2 directly into the water.

What's happening in that bath:

• Magnesium (from Epsom salts and magnesium chloride) absorbs transdermally — relaxing muscles, reducing nerve sensitivity, and supporting cellular energy
• MSM provides bioavailable sulphur — essential for joint cartilage, connective tissue repair, and reducing inflammation
• Bicarbonate alkalises the skin environment and buffers local acidity in inflamed tissues
• CO2 (released by the citric acid + bicarbonate reaction) penetrates the skin and acts directly on smooth muscle and vascular tissue — improving local circulation and reducing pain signalling
• Heat opens pores and increases transdermal absorption of all of the above

Twenty minutes or so in this bath and the aches and pains just dissolve away. It sounds too simple — but the chemistry is sound.

The Cold & Flu Protocol — Bicarb From Your Kitchen Cabinet

At the first sign of a cold or flu, reach for your bicarbonate before anything else.

Option 1 — Drink it:
½ teaspoon of bicarbonate of soda in a glass of water, twice a day. Watch the flu lighten up within 24 hours.

Option 2 — Sniff it:
Place 3 small pinches on your fingertip. Sniff one pinch into each nostril gently, then lick the last pinch. No water. This can be done up to 4 times a day.

✔ Airways and ears clear ✔ Tummies settle ✔ Allergic responses reduced

Bicarbonate also acts as a natural detergent — breaking down the fatty membranes of bacteria, viruses, and allergens. Place a small morsel of meat in your mouth without chewing — within minutes the bicarbonate in your saliva will begin decomposing it. That same action works on pathogens.

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Research References

1. O'Connor, P. et al. (2018). Oral NaHCO₃ activates a splenic anti-inflammatory pathway. Journal of Immunology, 200(10). Augusta University.
2. Werthmann, K. Cited in traditional naturopathic literature on alkaline terrain theory.
3. Peat, R. Various publications on CO2, oxidative metabolism, and cellular respiration. raypeat.com
4. Clinical trials on sodium bicarbonate and chronic kidney disease — Journal of the American Society of Nephrology.

Content provided for informational purposes only. Not medical advice. Not intended to diagnose, treat, or cure any condition. Consult your healthcare practitioner before beginning any new health protocol.