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Gut & Digestion

Independent, primary-sourced research on gut health and the microbiome — probiotics, fibre and digestive supplements graded by the actual strength of the evidence.

Sinus Issues (Chronic Rhinosinusitis): Independent Evidence on Saline, Steroids & Supplements

July 20, 2026July 6, 2026 by Pure City Research

Saline irrigation is the strongest non-drug intervention; most supplements lack CRS evidence. Independent human-trial evidence, funding traced.

Categories Asthma & Respiratory, Chronic Rhinosinusitis, Gut & Digestion

Natural vs Organic Certified: Why Organic Reduces Contaminants & Why EU Organic Is Safer

July 4, 2026 by Pure City Research

‘Natural’ has no legal definition; organic is certified — but neither is proven healthier. Independent evidence, funding traced, evidence graded.

Categories Gut & Digestion, Natural vs Organic

Zinc-L-Carnosine (Polaprezinc): Independent Evidence on Gastric Ulcer, H. pylori & Mucositis

July 4, 2026 by Pure City Research

Gastric ulcer healing and H. pylori adjunct — Japan drug, US supplement. Independent evidence, funding traced, evidence graded.

Categories Gut & Digestion, Zinc-L-Carnosine

L-Glutamine: Independent Evidence on Leaky Gut, IBS, IBD & Critical Illness Safety

July 8, 2026July 4, 2026 by Pure City Research

Leaky gut repair? One strong RCT in a narrow IBS subgroup; critical-illness harm signal. Independent evidence, funding traced, evidence graded.

Categories Energy & Focus, Gut & Digestion, L-Glutamine

Bovine Colostrum: Independent Evidence on Gut, Immunity & Skin

July 4, 2026July 4, 2026 by Pure City Research

Liquid gold for immunity? Athlete URTI data, beauty claims thin. Independent human-trial evidence, funding traced, evidence graded.

Categories Bovine Colostrum, Energy & Focus, Gut & Digestion

Psyllium Husk: Independent Evidence on Cholesterol, Glucose & Weight

July 4, 2026July 4, 2026 by Pure City Research

Nature’s Ozempic? LDL and glucose yes — weight loss, weak. Independent human-trial evidence, funding traced, evidence graded.

Categories Diabetes & Blood Sugar, Fat Loss & Metabolism, Gut & Digestion, Heart & Cardiovascular, Psyllium Husk

Yeast Protein: Independent Evidence on Safety, Purines & Efficacy

July 4, 2026July 4, 2026 by Pure City Research

Single-cell vegan protein — one manufacturer-funded RCT, weak evidence. Independent human-trial evidence, funding traced, evidence graded.

Categories Gut & Digestion, Muscle Building, Yeast Protein

Sucralose: Independent Evidence on Gut Microbiome, Glucose & Safety

July 4, 2026July 4, 2026 by Pure City Research

Gut microbiome shifts and glycemic effects in human RCTs. Independent human-trial evidence, funding traced, evidence graded.

Categories Diabetes & Blood Sugar, Gut & Digestion, Sucralose

Monk Fruit (Luo Han Guo): Forms, Mogroside Grades & Independent Evidence

July 8, 2026July 4, 2026 by Pure City Research

Mogroside V grades, forms, and the thin human evidence. Independent human-trial evidence, funding traced, evidence graded.

Categories Diabetes & Blood Sugar, Gut & Digestion, Monk Fruit

Stevia: Forms, Grades & Independent Evidence on Glucose, Blood Pressure & Safety

July 20, 2026July 4, 2026 by Pure City Research

Stevioside vs Reb A vs Reb M — which form actually works. Independent human-trial evidence, funding traced, evidence graded.

Categories Blood Pressure, Diabetes & Blood Sugar, Gut & Digestion, Stevia
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Pure City Research is funded by Pure City Shop. The Shop is funded directly by customers through product purchases and product pre-orders, so the research is ultimately funded by consumers.

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