Integritus Prime

Lately, I have been thinking about how quickly we blame one food for how we feel.

My loved one says wholemeal bread helps her blood sugar feel steadier, yet leaves her bloated. Caffeine seems to make her more active and creative, but she is also sleeping later. Which ingredient is helping? Which is causing trouble? And how much is simply age?

I have been vegan and gluten-free for a decade, and I avoid refined sugar. That has taught me that labels rarely tell the whole story. Caffeine, sugar and gluten arrive in combinations—and in bodies that keep changing.

Here are five insights worth considering.

1. Caffeine may support aging—but more is not necessarily better

A 2026 study following more than 130,000 people for up to 43 years found that caffeinated coffee and tea were associated with a lower risk of dementia and modestly better cognitive function. The strongest association appeared around two to three cups of coffee or one to two cups of tea a day. However, this was an observational study: it found a relationship, not proof that caffeine prevents dementia (JAMA).

The message is not “drink more coffee.” It is that moderate caffeine may have a place in healthy aging—if our bodies tolerate it.

2. Age does not give everyone the same caffeine response

We often hear that older people automatically metabolise caffeine more slowly. Yet a small study comparing young and elderly men found broadly similar caffeine clearance, with substantial variation between individuals (Journal of Pharmacokinetics and Biopharmaceutics).

What may change is the context: lighter sleep, medications, irritability, or sensitivity to palpitations and anxiety. A cup that felt harmless at 4 p.m. may now be borrowing from the night.

The better question is not, “Am I too old for coffee?” It is, “What does this amount, at this time, do to my sleep and energy?”

3. Sugar can change the story of the coffee

Coffee’s possible benefits do not extend automatically to every sweetened coffee drink. A 2025 US cohort study linked black coffee and coffee with low amounts of added sugar and saturated fat to lower mortality. The same association was not seen when additions were high (The Journal of Nutrition).

There is another wrinkle. Small controlled studies suggest caffeine can temporarily worsen glucose handling in some people (PubMed). Add refined sugar, and the morning “lift” may be followed by hunger, shakiness or an energy dip.

This is worth noticing when glucose control becomes a concern. The World Health Organization recommends keeping free sugars below 10 per cent of daily energy, with further benefits below 5 per cent (WHO).

4. Gluten and refined sugar often travel together

When bread, biscuits or cake cause bloating or fatigue, gluten may be blamed immediately. But these foods may also contain refined flour, sugar, fats, additives and fermentable carbohydrates. Removing the food removes all of them, so feeling better does not identify the culprit.

For people with celiac disease, gluten avoidance is essential. For everyone else, gluten is not automatically harmful. Long-term research found no association between gluten intake and heart disease in adults without celiac disease; unnecessarily avoiding whole grains may even reduce fibre intake (BMJ). For some people with non-celiac gluten sensitivity, a gluten-free diet may improve digestive symptoms such as pain and bloating and reduce neurological symptoms such as brain fog, potentially supporting both gut and cognitive wellbeing (American Journal of Gastroenterology; PLOS One).

5. “Gluten-free” can still mean highly processed

A gluten-free biscuit may still be full of refined starch and sugar. The absence of gluten does not make it nourishing.

Naturally gluten-free foods—rice, root crops, legumes, vegetables and fruit—tell a very different nutritional story from packaged substitutes. The US National Institute of Diabetes and Digestive and Kidney Diseases notes that some gluten-free products are higher in fat and sugar and may provide less fibre, iron and calcium. It also advises testing for celiac disease before removing gluten, because avoidance can make test results inaccurate (NIDDK).

Aging invites us to become curious, not fearful. Change one variable at a time. Notice sleep, bloating, mood, hunger and energy. Look beyond the label—and listen to the body you have now, not the one you had twenty years ago.

What has your changing body been trying to tell you?