Answering Every Medical Question In My DMs | RTC 39

What happened in this episode?

Doctor Mike Varshavski answers a rapid series of health questions sent via DMs, mixing practical guidance with commentary about evidence quality and medical marketing. He describes the appendix as potentially supporting immunity by serving as a reservoir for gut microbiome after severe diarrhoea or antibiotics, while noting the theory is not definitive. On diet questions, he says sweets may be preferable to sugar-sweetened drinks because beverages can deliver large calorie loads without satiety; he names Subway and Chipotle as comparatively controllable fast-food options, while flagging sodium.

On reproductive health, he says long-term use of birth control pills for pain can be acceptable for many patients but depends on contraindications such as clotting risk, smoking, migraine with aura, and cancer history; he cites CDC guidance suggesting use until around age 50–55 or menopause, while noting menopause can be hard to identify on hormonal contraception. He discusses fibre’s roles in stool bulking, gut lining, microbiome and glucose absorption. On supplements, he calls creatine evidence-based for performance but says it is usually unnecessary for most people and cautions against over-claiming mental health benefits from low-quality studies.

He pushes back on vaccine–autism claims as unsupported by large international evidence, questions the booming market for electrolyte packets for most exercisers, and advises that peeing after sex is largely based on expert opinion rather than strong research. He also discourages whole-body MRI screening for average-risk people, warning about false positives and anxiety. Other topics include exposure therapy for phobias, pink eye contagion depending on cause, and Lyme disease risk after tick bites typically requiring prolonged attachment.

What are the key points?

• Varshavski says the appendix may help immunity by reseeding gut microbiome after diarrhoea/antibiotics, but frames it as theory.
• He says sugar-sweetened drinks are easier to overconsume than sweets because they do not create the same fullness.
• On birth control pills for pain, he cites CDC guidance of roughly age 50–55/menopause, with contraindications including clotting risks, smoking and migraine with aura.
• He calls creatine one of the most evidence-based sports supplements, but generally unnecessary for most non-athletes; he cautions against premature mental-health claims.
• He says the evidence does not support vaccines causing autism, referencing dozens of studies across hundreds of thousands of children.
• He argues most people do not need electrolyte packets and warns excess intake may be harmful in some medical conditions.
• He advises against whole-body MRI screening for average-risk people, citing false positives and anxiety, and criticises branded marketing of such scans.

Which topics are covered?

How is this page sourced?

Programme

The Checkup with Doctor Mike

Published

9 August 2026

Duration

18m

Original episode

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