Nutrient deficiency in this patient was not a matter of eating too little. It was a failure at three points at once. His diet was high in refined starch and processed food and correspondingly low in nutrient density, so less went in. His intestinal lining was inflamed and permeable, so less of what did go in was absorbed — and the dysbiotic bacteria that should have been manufacturing B vitamins and vitamin K within his gut were no longer there to do it. Meanwhile his demand was abnormally high, because chronic inflammation and the constant work of detoxification consume antioxidants and minerals at several times the normal rate, and accumulated heavy metals were displacing zinc and magnesium from the enzymes that needed them. Low supply, poor absorption, high demand. Vitamin D deficiency was confirmed directly on testing; the remainder were inferred from the pattern of his diseases and corrected accordingly.

Adult Onset Asthma — Development:

1. A refined, processed, wheat-heavy diet, an inflamed and poorly absorbing intestinal lining, a dysbiotic gut no longer synthesising vitamins, and no supplementation at any point left him progressively depleted across decades.
2. Vitamin D, confirmed deficient on testing, is one of the principal regulators of immune tolerance — it maintains the regulatory T-cells that hold the immune system's allergic responses in check.
3. Without that brake, his immune system drifted toward the Th2-dominant, hyper-reactive state that defines asthma.
4. Deficiency of the antioxidant nutrients — vitamin C, vitamin E, selenium and zinc — left his airway lining unable to neutralise the oxidative injury delivered by every inhaled irritant.
5. Magnesium, which relaxes bronchial smooth muscle, was depleted both by poor absorption and by displacement from its binding sites by accumulated heavy metals — so his airways constricted more readily and relaxed less easily.
6. Shortage of omega-3 essential fatty acids shifted the balance of inflammatory signalling molecules toward the pro-inflammatory leukotrienes that drive bronchoconstriction and mucus secretion.
7. Vitamin A and zinc deficiency impaired the regeneration of the airway lining itself, so inflammatory damage accumulated as permanent thickening rather than being repaired.
8. Chronically inflamed, hyperreactive, poorly repaired airways produced his wheezing, breathlessness, cough and phlegm — his adult onset asthma.

Irritable Bowel Syndrome — Development:

1. The same low-nutrient diet, impaired absorption, absent bacterial synthesis and lifelong lack of supplementation depleted the nutrients his digestive tract needed most.
2. The intestinal lining is the fastest-renewing tissue in the human body, replacing itself every three to five days, and that renewal consumes enormous quantities of nutrients.
3. Zinc deficiency directly undermined the tight junction proteins holding that lining sealed, and slowed epithelial repair.
4. Shortage of glutamine, the primary fuel of intestinal cells, and of B12 and folate, required for the rapid cell division that renewal demands, meant the lining could not rebuild itself at the rate it was being damaged.
5. Magnesium deficiency impaired the smooth muscle relaxation on which coordinated bowel motility depends, slowing transit and hardening the stool — a direct contributor to his constipation.
6. Vitamin D deficiency reduced production of the antimicrobial peptides that normally police the gut's bacterial balance, allowing the dysbiosis to persist unchecked.
7. Missing enzyme cofactors left food incompletely digested, feeding abnormal fermentation, gas and distension.
8. A lining that could not repair, motility that would not coordinate and digestion that would not complete produced the pain, bloating and irregular bowel habit of his irritable bowel syndrome.

Gluten Intolerance — Development:

1. Decades of nutrient-poor eating, failed absorption and untreated dysbiosis left him deficient in precisely the nutrients required to handle dietary protein safely.
2. Zinc-dependent peptidase enzymes break gluten fragments into harmless pieces; zinc deficiency left those enzymes inactive, so large peptides survived digestion intact.
3. Deficiency of glutamine, vitamin A and zinc meant the intestinal barrier could not repair the damage already done to it, and remained open.
4. Intact gluten peptides therefore crossed into his bloodstream in quantity.
5. Vitamin D deficiency had removed the regulatory T-cell tolerance that normally prevents the immune system from reacting against harmless food proteins.
6. His immune system consequently sensitised against gluten instead of ignoring it, generating antibodies that fired at every subsequent wheat-containing meal.
7. Each reaction inflamed the lining further, deepening the deficiency that caused it — the loop that established his gluten intolerance.

Sciatica — Development:

1. Poor dietary nutrient density, an intestinal lining that could not absorb, a gut that could not synthesise and a lifetime without supplementation left his nervous system chronically underfed.
2. Vitamin B12, B6 and B1 are required for the synthesis and maintenance of myelin, the insulating sheath around every peripheral nerve — including the sciatic nerve.
3. Deprived of them, the myelin sheath degraded faster than it could be rebuilt, and nerve conduction became erratic and pain-prone.
4. Magnesium deficiency raised nerve membrane excitability and caused sustained spasm in the muscles surrounding his lumbar spine, mechanically tightening the space through which the nerve root passes.
5. Antioxidant depletion left the nerve tissue unable to neutralise the oxidative damage being delivered by inflammation and accumulated heavy metals.
6. Shortage of the amino acids, vitamin C and minerals needed for collagen synthesis impaired repair of the intervertebral discs and connective tissue supporting the spine.
7. A demyelinated, hyperexcitable, mechanically compressed nerve that could not repair itself produced the severe sciatic nerve pain of his sciatica.