Artificial Sweetener Study (03:16)
Low sugar products may be interfering with how our bodies process sugar. Volunteers take either saccharin or stevia for a week. Learn about the effects of high blood sugar on the body.
Artificial Sweetener Study Results (04:05)
Four of six volunteers taking saccharin have increased blood sugar, while volunteers taking stevia experience little change. The saccharin group also has changes in gut bacteria— suggesting that some low sugar products are doing more harm than good.
Meal Timing Experiment (04:59)
We tend to snack throughout the day, but taking longer periods between meals may be beneficial for our metabolism. Against a control group, volunteers will eat a later breakfast and earlier dinner for 10 weeks to schedule a longer overnight rest period.
Scented Home Product Study (03:42)
Research suggests chemicals in perfume may be harmful. Analysis of air in six York homes shows high levels of limonene that reacts with air molecules to form formaldehyde.
Decreasing Household Toxicity (03:29)
York homes with high levels of limonene from scented cleaning products show decreases in formaldehyde after introducing house plants.
Dandruff Treatment (03:49)
The malassezia globosa fungus feeds on scalp sebum, releasing oleic acid that causes flaky skin in some people. Learn about coal tar, salicylic acid, and antifungal shampoos. If antifungal products stop working, switch to products containing zinc or selenium.
Effects of Late Dinners (02:57)
Dr. Michael Mosley eats the same meal at breakfast and at dinner, 12 hours later. After the second meal, he has prolonged high levels of fat and sugar in his blood. The internal body clock seems to process food differently throughout the day.
Circadian Rhythms and Metabolism (03:52)
Mosley enters an isolation room for 24 hours, eats small snacks, and has blood drawn regularly. His blood fat and sugar levels rise in the evening, linked to melatonin. Consuming more calories earlier in the day helps metabolism regulation and weight loss.
WD-40 for Psoriasis (01:28)
Paraffin is used as an emollient in dry skin lotions, and is likely an ingredient in WD-40. However, Dr. Chris van Tulleken does not recommend using the metal joint lubricant for skin conditions due to toxic chemicals.
Peanut Allergy Threat (03:30)
Conny, age 12, has a life threatening peanut allergy and worries that she will inadvertently consume peanut traces in other foods. Researchers have Richard undergo a controlled immune reaction.
Peanut Allergy Treatment Trial (04:01)
Many peanut allergies start when infants come into skin contact with peanut oil. Patients are given a tiny dose of peanut protein that is gradually increased until they can tolerate trace amounts. Conny hopes to be able to eat out without fearing a reaction.
Treating a Severe Allergic Reaction (03:02)
Dr. Saleyha Ahsan explains how to administer adrenaline to save someone in anaphylaxis. View symptoms and learn about common allergens.
Effects of Microwaving Food (02:30)
Dr. Saleyha Ahsan explains that microwave ovens cause water molecules to vibrate, heating food. Any method of heating food decreases nutrients; shorter cooking times—such as microwaving—help retain them.
Mealtime Experiment Results (03:42)
Against a control group, volunteers have eaten a later breakfast and earlier dinner for 10 weeks to extend the overnight rest period. They have lower percentage body fat, fasting blood sugar and cholesterol levels. This could be due to circadian rhythms or longer fasting.
Credits: Metabolics: Episode 2—Trust Me…I'm a Doctor, Series 4 (00:32)
Credits: Metabolics: Episode 2—Trust Me…I'm a Doctor, Series 4
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