Claim checker

The direction holds: eating late is linked to a weaker nocturnal blood-pressure dip, and that dip genuinely matters. But 'substantial benefits' from exactly three hours is firmer than the research; the studies are small and short. → Does your biological age change differently at night than during the day?

No trial has investigated this protocol. What exists is clinical anecdote plus a mechanistic hypothesis; as a treatment it is not substantiated. → How do I know whether I have enough vitamin D, and should I be supplementing?

Small studies show vitamin D influences the microbiome, but the chain to B-vitamin production and symptoms is the guest's hypothesis, not demonstrated in humans. → How do I know whether I have enough vitamin D, and should I be supplementing?

Correct: older skin produces considerably less vitamin D at the same sun exposure. Exactly why supplementation advice rises with age. → How do I know whether I have enough vitamin D, and should I be supplementing?

Matches our answer: BPC-157 shows promising results in animal research, but in humans it is barely studied. Preliminary evidence, not a proven compound. → What do peptides like BPC-157 do, and are they safe?

Clashes with what human studies show: weight loss with GLP-1 does cost muscle mass, which is exactly why it calls for strength training and enough protein. → Do you lose muscle mass when losing weight with a GLP-1 medication, and how do you prevent it?

The guest's personal experience; there is no published research on microdosing. Our answer on it stands at insufficient evidence. → What are the effects of microdosing with Ozempic?

Holds up at its core: a large randomised trial in over 17,000 people with cardiovascular disease found 20% fewer serious events. Caveat: shown in patients, not in healthy people. → Do GLP-1 medications (such as Ozempic) help you age more healthily?

GLP-1 helps with weight loss, and losing weight can improve the cycle. But restoring PCOS itself or fertility has not been shown; no trial has investigated this. → Do GLP-1 medications (such as Ozempic) help you age more healthily?

There is no research showing methylated vitamins work better for healthy people, and for multivitamins in general the demonstrated benefit is already small. Targeted supplementation for a measured deficiency delivers more than a pricier multi for everyone. → Do multivitamins help with healthy ageing?

Strictly speaking true: there are essential fats and amino acids, but no essential carbohydrate; your liver makes glucose itself. Mind you: 'not essential' says nothing about what healthy eating is; there the whole dietary pattern counts. → Is a low-carbohydrate or ketogenic diet good for longevity?

Supplementing vitamin D makes sense when you are deficient, and deficiencies are common, especially in winter. But 'almost everyone' is too broad, and the evidence for the fixed K2 combination is thin. Measure first, then supplement. → How do I know whether I have enough vitamin D, and should I be supplementing?

It sounds logical, but is not quite right: some collagen peptides reach your blood as active fragments, and randomised studies show modest but real effects on skin and joints. So this dismissal does not hold up. → Do collagen supplements work against skin ageing?

Cold raises energy expenditure and activates brown fat; that is real. But the effect is too small to visibly lose fat with. Diet and exercise still do that work; the ice bath is at most a nice bonus. → Does a cold bath or ice bath benefit your health in the long term?

After exercise there are indications that cold water dampens muscle inflammation. For chronic inflammation, and certainly for effects in the brain, the evidence is not there yet. A promising lead, not yet a fact. → Does a cold bath or ice bath benefit your health in the long term?

The eleven minutes come from one small Danish study in which winter swimming activated brown fat. That cold stimulates your metabolism is true, but such a precise weekly recipe offers more certainty than the evidence currently carries. → Does cold showering or an ice bath speed up your metabolism?

This is mostly lab work so far: measurements show that blending in plastic releases particles, but the number of studies is small and health effects have not been examined. An interesting signal, not yet an established fact. → How harmful are microplastics in your body to your health?

Correct: thermal paper contains free BPA and skin absorption has been demonstrated; the EU banned BPA in receipts in 2020 for that reason. Mainly relevant for people handling them daily, not for one loose receipt. → How harmful are microplastics in your body to your health?

Nanoplastics have amply been shown in bottled water, and uptake through the gut has been seen in lab models. But how much really enters the body in humans, and what it does there, is still open. This research field is moving fast; we are tracking it. → How harmful are microplastics in your body to your health?

Well supported: with heating and with acidic or fatty contents, plastics release measurably more plasticisers and bisphenols. So better not to store or reheat hot food in plastic; a simple win without hassle. → How harmful are microplastics in your body to your health?

Correct: resistance training demonstrably improves insulin sensitivity and blood sugar regulation. That is exactly why strength training is a strong recommendation in our answer on insulin resistance. → Does strength training help against insulin resistance?

The core is right: for losing visceral fat, endurance training is the strongest card in the research. But dismissing strength training goes too far: it improves your metabolism and blood sugar regulation, and the combination of both works best. → How dangerous is belly fat?