Feel Better, Live More with Dr Rangan Chatterjee BITESIZE | Avoid These 3 Foods to Boost Your Health Defences | Dr William Li #647
53 snips
Apr 9, 2026 
Dr William Li, physician-scientist and bestselling author on food as medicine, explores how everyday foods can strengthen or weaken the body’s natural defenses. He talks about sugar, diet soda, artificial sweeteners, ultra-processed foods, and suspicious labels. He also covers simple food swaps and building meals around healthy foods you already love.
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Why Sugary Drinks Weaken Natural Defences
- William Li says added sugar can suppress multiple health defenses, especially stem cell function and the gut microbiome.
- He contrasts fruit with soda, arguing a can can deliver about 10 teaspoons of sugar that the body cannot handle all at once.
Read Drink Labels Like a Skeptic
- Read beverage labels and be wary of drinks packed with additives your body is not built to process.
- William Li points to chemical flavorings, artificial colors, and preservatives as the shift from simple fizzy drinks to modern soda.
Why Diet Soda Can Backfire
- William Li argues many diet sodas can still worsen metabolism because artificial sweeteners disturb gut bacteria.
- He separates synthesized sweeteners like aspartame and sucralose from more natural options, while warning even products labeled stevia may contain additives.
