Your body
21 questions in the your body category.
| Question | Answer | Confidence |
|---|---|---|
| What happens if you stop eating sugar? | Blood glucose steadies within days and dental risk drops immediately; most other changes come from eating fewer calories overall. | Established science |
| What happens if you stop drinking alcohol? | Sleep and liver markers improve within weeks, and blood pressure typically falls — but heavy drinkers must not stop abruptly without medical advice. | Established science |
| What happens if you stop smoking? | Carbon monoxide clears within a day, lung function improves within months, and heart disease risk halves within a year. | Established science |
| What happens if you stop eating meat? | Fibre intake usually rises and saturated fat falls — but vitamin B12 has to come from somewhere, and it is not plants. | Established science |
| What happens if you crack your knuckles every day? | Nothing much. It does not cause arthritis — a doctor tested it by cracking one hand only for 60 years. | Established science |
| What happens if you swallow gum? | It passes through in a day or two. The seven-years story is entirely false. | Established science |
| What happens if you stop drinking coffee? | A withdrawal headache for two to nine days, then nothing — caffeine tolerance resets in about a week or two. | Established science |
| Do you really need eight glasses of water a day? | No. Total fluid needs are met by all drinks and food, and thirst is a reliable guide for most people. | Established science |
| What happens if you only drink water? | Mostly it removes liquid calories — the average person drinking only water cuts several hundred calories a day without noticing. | Established science |
| What happens if you stop exercising? | Aerobic fitness starts falling within about two weeks; strength holds up considerably longer. | Established science |
| What happens if you hold your breath for too long? | You cannot hold it until you die — the reflex takes over, and consciousness ends any voluntary effort long before that. | Established science |
| What happens if you never brush your teeth? | Plaque hardens into tartar within days, gums inflame within weeks, and teeth are lost over years. | Established science |
| What happens if you only eat one food? | You develop whatever deficiency that food lacks — and every single food lacks something. | Established science |
| What happens if you stop eating salt? | Blood pressure usually falls, which is the point — but sodium is essential, and zero is not the target. | Established science |
| Does shaving make hair grow back thicker? | No. Shaving cuts the shaft at its widest point, which makes regrowth feel coarser without changing anything. | Established science |
| What happens if you hold in a sneeze? | Usually nothing — but pinching the nose and closing the mouth redirects real pressure, and rare injuries are documented. | Established science |
| Do you have to wait 30 minutes after eating before swimming? | No. There is no evidence behind the waiting rule — digestion does not divert enough blood to cause drowning. | Established science |
| Does reading in dim light damage your eyes? | No. It causes eye strain and headaches, and does not cause lasting damage. | Established science |
| Can you catch a cold from going outside with wet hair? | No. Colds are caused by viruses; being cold and wet does not create one. | Established science |
| What happens if you never wash your hair? | Sebum, dead skin and dust accumulate; it becomes greasy then matted, and the scalp is likelier to become itchy and flaky. | Established science |
| What happens if you never sleep on your side? | Back sleeping worsens snoring and sleep apnoea for many people; front sleeping strains the neck. Side sleeping is the default for good reasons. | Reasoned extrapolation |
- What happens if you stop eating sugar? Blood glucose steadies within days and dental risk drops immediately; most other changes come from eating fewer calories overall.
- What happens if you stop drinking alcohol? Sleep and liver markers improve within weeks, and blood pressure typically falls — but heavy drinkers must not stop abruptly without medical advice.
- What happens if you stop smoking? Carbon monoxide clears within a day, lung function improves within months, and heart disease risk halves within a year.
- What happens if you stop eating meat? Fibre intake usually rises and saturated fat falls — but vitamin B12 has to come from somewhere, and it is not plants.
- What happens if you crack your knuckles every day? Nothing much. It does not cause arthritis — a doctor tested it by cracking one hand only for 60 years.
- What happens if you swallow gum? It passes through in a day or two. The seven-years story is entirely false.
- What happens if you stop drinking coffee? A withdrawal headache for two to nine days, then nothing — caffeine tolerance resets in about a week or two.
- Do you really need eight glasses of water a day? No. Total fluid needs are met by all drinks and food, and thirst is a reliable guide for most people.
- What happens if you only drink water? Mostly it removes liquid calories — the average person drinking only water cuts several hundred calories a day without noticing.
- What happens if you stop exercising? Aerobic fitness starts falling within about two weeks; strength holds up considerably longer.
- What happens if you hold your breath for too long? You cannot hold it until you die — the reflex takes over, and consciousness ends any voluntary effort long before that.
- What happens if you never brush your teeth? Plaque hardens into tartar within days, gums inflame within weeks, and teeth are lost over years.
- What happens if you only eat one food? You develop whatever deficiency that food lacks — and every single food lacks something.
- What happens if you stop eating salt? Blood pressure usually falls, which is the point — but sodium is essential, and zero is not the target.
- Does shaving make hair grow back thicker? No. Shaving cuts the shaft at its widest point, which makes regrowth feel coarser without changing anything.
- What happens if you hold in a sneeze? Usually nothing — but pinching the nose and closing the mouth redirects real pressure, and rare injuries are documented.
- Do you have to wait 30 minutes after eating before swimming? No. There is no evidence behind the waiting rule — digestion does not divert enough blood to cause drowning.
- Does reading in dim light damage your eyes? No. It causes eye strain and headaches, and does not cause lasting damage.
- Can you catch a cold from going outside with wet hair? No. Colds are caused by viruses; being cold and wet does not create one.
- What happens if you never wash your hair? Sebum, dead skin and dust accumulate; it becomes greasy then matted, and the scalp is likelier to become itchy and flaky.
- What happens if you never sleep on your side? Back sleeping worsens snoring and sleep apnoea for many people; front sleeping strains the neck. Side sleeping is the default for good reasons.