Catégorie : Blog

nutritional advice

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Building habits (part 3): essential rules

In the first article, I explained how habits rely on our brain autopilot and support our executive functions. Whatever is your goal, there are key rules when implementing your habits.

1 – Something is better than nothing

To form a new habit, you need to activate your neural networks. It means you need to stimulate them: doing something will, doing nothing won’t. Start small and build on.

2 – Consistency matters the most

When you start working on new habits, your executive brain is still activated and actions are very deliberate. As the new routine is implemented, the autopilot is activated. The more often you repeat the new action, no matter how small, the stronger and the more efficient the autopilot becomes. Eventually the autopilot takes over: the habit is formed.

This has to do with synaptic plasticity, which is as Wikipedia simply puts it « the ability of synapses to strengthen or weaken over time, in response to increases or decreases in their activity ». Repeated actions, over time, become habits. Random actions don’t.

3 – Repeated, « good enough » actions

When trying to form new habits, we sometimes set the bar too high, feel discouraged and can’t be consistent. Reduce your threshold of what is « good enough » to focus on small, achievable and sustainable actions that you can do consistently. This will activate the autopilot and embed the new habit.

In a few words, regular small steps will take you to your objective.

As I started a new job, one of my objectives is to build a routine around publishing articles here. I am aiming for one per week but need to find the right cues (time, place etc).

And you, are you trying to implement a new habit in your life?

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Sugar and cancer risk

TL, DR: sugar is not a carcinogenic (cancer-causing) substance.

The idea that sugar fuels cancer cells is a fallacy that unfortunately thrives on the Internet. No studies in people have shown that reducing sugar intake prevents or treats cancer. No studies have shown that eating too much sugar causes cancer.

There is no direct link, and therefore no causality, between sugar and cancer.

All cells, including cancer cells, require energy to survive and grow, this energy is glucose. When we eat sugary foods (simple carbohydrates), glucose gets absorbed straight into the bloodstream ready, for cells to use. When we eat starchy food (complex carbohydrates), like pasta, the digestion process breaks them down into glucose. When there are no carbohydrate in our diet, cells can turn fat and protein into glucose as a last resort, because they need glucose to survive. This means that replacing sugar with other energy sources won’t affect the growth of cancer cells.

Remember that a healthy diet includes carbohydrates, for the energy, fibre, minerals and vitamins that they contain. Avoiding healthy, nutritious foods is not a science-based method to prevent any disease. Avoiding sugar will not prevent cancer, as consuming sugar won’t cause cancer. « Cancer » is a group of different diseases triggered by a huge variety of genetic and lifestyle factors.

The only link between cancer and sugar is indirect: excessive sugar intake can lead to weight gain and increase the risk of obesity and diabetes, which may in turn increase the risk of cancer.

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Building habits (part 2): key steps

In the first article I explained how habits support the executive functions of the brain. It is estimated that 40% of our actions rely on habits, this is why building habits that serve your goals is essential. Here are a few tips for that.

Tip 1: Identify the habit

The new habit or routine is the behaviour you want to start or change. This can be exercising, stop adding salt, walking more. I will take the example of my Saturday 8.30am yoga class.

Tip 2: Set reminders

One of the key aspects to forming a new habit is remembering everything you need to remember in order to follow through on your aspiration. Forgetting is easy, as our brains always take the easy way, the way of current habits 😉

In my case, I have 2 reminders for this yoga class: one to remember to book the class, and one popping on my phone 30mins before the class.

Tip 3: Start small

This means being specific, and to think of the when, where, how. My aim was not to go to yoga everyday, but to commit to this one, every Saturday. If you can’t proceed to your chosen habit (class cancelled, preferred food not available etc) , have an alternative so that your brain does not associate the reminder to nothing. My alternative to yoga is running. Anything is better than nothing.

Small actions are the seeds for the habit to grow, they activate your neuronal networks.

Tip 4: Reward yourself

We are wired to seek pleasure. Our brain releases « happiness » chemicals during reward, which help the remodelling of neuronal circuits and new habits to stick. We usually think of extrinsic rewards (money, food, objects) but intrinsic rewards work just as well: this feeling once you finish your run, the calm after yoga, learning a new skill, being more energised etc. Remember that the reward comes from the smallest action towards your goal, so the smallest step towards changing or building a habit is rewarding.

After my yoga class, I feel both relaxed and energised, I am (usually!) satisfied with the progress made, and seeing my teacher is a pleasure in itself.

Tip 5: Repetition

As you repeat an action, the new neuronal circuits reinforce and it starts to require less effort. With time, the action is transferred from executive brain, that requires a lot of mental energy, to the autopilot brain and it becomes easier and almost automatic.

And you, what habit would you like to build to achieve your goals?

My current challenge is to eat less salted butter to decrease my overall salt consumption 🙂

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A healthy, happy Ramadan

During the holy month of Ramadan (ninth month of the Islamic calendar), adult Muslims across the world fast during daylight hours for 29-30 days. Fasting is one of the 5 pillars of Islam and means abstaining from food, drink, sexual activity and smoking during daylight hours. Some people who are ill or whose health could be affected by fasting are exempt: pregnant and breastfeeding women, people with diabetes, people travelling…

Here are a few tips for a healthy and happy Ramadan.

Stay hydrated

Before breaking your fast, drink fluids to avoid dehydration: water, teas (low in theine in the evening) and herbal teas are your best allies. Be mindful of the sugar content of juices and soft drinks. It is also very important to hydrate enough before the breaking the fast at Suhoor each day.

Dates at Iftar

Dates are traditionally eaten (in an odd number!) to break the fast, they will increase your blood sugars and give you energy, as well as fibres and minerals. Other dried fruits such as apricots, figs, raisins or prunes will also provide fibre and nutrients.

Have a soup

Soups help with hydration, energy and provide a range of nutrients: carbs (potatoes, cereals), proteins (eggs, meat or poultry but also beans and pulses), fibres from beans, pulses and veg,

More veg!

In salads, sides, veg provides us with vitamins, minerals and fibres.

Breakfast – Suhoor

Have carbsbefore the fast begins to ensure you have sufficient energy for the day. Cereals, particularly wholegrains, such as porridge, muesli, oats or slices of wholemeal sourdough are good choices for a slow energy release. Be mindful of the salt and sugar content as it could make you thirsty. Proteins also help with satiety.

RAMADAN MUBARAK!

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Building habits (part 1) : why habits matter

Today’s post will be the first of a series about habits (and change). The objective is to give you an explanation of why we have habits, and how we can change them to make them literally work for us. Why do I write about habits here? Because a lot of our lifestyle choices (diet, exercise, alcohol consumption, smoking…) consist in habits, and if we want to make a lifestyle change last, having some basic knowledge in psychology and neuroscience can help. Let’s start by having a look at our brain.

Isaac Tobin/Dan Harris/ABC News

As human we have a uniquely large executive brain that support executive functions such as working memory, flexible thinking, impulse control, self monitoring, motivation, emotional control, willpower, planning, prioritisation and task management. These functions are future-oriented and enable us to make decisions according to our objectives.

Executive functions require a lot of mental energy, which can be drained by the demands of our busy, modern lives, leaving us feeling low.

This is where the autopilot, that sits deep within our brain, comes handy. The autopilot does not interact with motivation, it is made of habits. Habits are stimulus-response behavioural task, they are automatic. Brushing your teeth, going to the gym every Monday lunchtime, eating porridge at breakfast, adding salt to your food….

If our habits support our goals, we rely on autopilot more and have more mental energy available for our executive brain. We are more motivated, we perform better. When our habits don’t align with our objectives, our executive brain uses extra mental energy to suppress them, eventually we risk feel drained. The problem is that we cannot always replenish our mental energy enough, or reduce the demands of our executive brain.

Therefore, to cope with the demands of our busy lives, we can build habits that support our goals, while changing the habits that go in their way.

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This might make you poop

Ah, poo! Le caca in French! Say this simple word and you will get a lot of attention (not only from children). Let’s have a look at what can make you poop, and it’s not only food as you will see.

Exercise

Some of you may have experienced that: you start your run and after a few minutes, mid-run or even just at the finish line you feel the urge to poop. Although the exact mechanisms are not yet clear, a combination of factor can increase gut motility and bowel movements. These include increased blood flow triggered by the physical activity and the release of vasoactive intestinal peptide, neurotransmitters and adrenaline.

Coffee

Caffeine may trigger contractions in your colon and intestinal muscles while relaxing the anal sphincters… Through other mechanisms a decaf coffee can have the same effects, the simple act f drinking making the colon more active.

Anxiety

Stressful situations trigger hormone release (adrenaline, cortisol, serotonin), which can upset the digestive system, causing intestinal spasms and increasing gastrointestinal motility.

Your period

The hormones at play this time are the prostaglandins that relax smooth muscles in the gastrointestinal tract.

Water intake

Water contributes to the digestion process, it can help soften stool and prevent constipation.

As you see, some factors are outside of our control, but you can act on others such as water intake and exercise in case you feel constipated. Finally, did you know that a poop scale exists?? It is called the Bristol stool scale or chart, ideally you want to be between types 3 and 4, a nice sausage 🙂

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Cooked vs raw: how to get the most vitamin A from your carrots

Vitamin A is a group of fat-soluble retinoids involved in immune function, cellular communication, growth and development, and male and female reproduction. It is essential to vision.

It is found as retinol in animal foods, and carotenoids in plant foods, like carrots, bell peppers, broccoli, kale, mangoes, oranges, spinach…. To say that vitamin A is fat-soluble means that it can dissolve in fats and oils, it is therefore absorbed with fats during meals and stored in the body’s fatty tissue and in the liver.

Several studies have found that carotenoids are better absorbed when eaten with fats (because of the fat solubility) and from meals containing cooked, pureed vegetables than from meals containing the raw vegetable. Cooking the vegetables helps the absorption of the vitamin.

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Tips and tops against food waste

It is estimated that nearly one third of food produced for human consumption is lost or wasted, with considerable environmental impacts, aggravating ecosystem damage.

Polyphenols in plants are particularly concentrated in leaf tissues, they aid in plant defense, against ultraviolet radiation or aggression by pathogens. They contribute to the bitterness, astringency, colour, flavour, odour and oxidative stability. The more colourful a plant is, the more polyphenols it contains.

pesto herbs
Herbs pesto

A small change in your cooking habits can help decrease your food waste and increase your polyphenol intake. Because they are part of a plant defence system, polyphenols are concentrated in outer leaves or stalks, so don’t throw them away.

Here are a few ideas to increase your polyphenol intake and reduce waste:

  • eat the out leaves of salads,
  • roast the cauliflower leaves,
  • use carrot leaves, courgette stems, leftover herbs and greens to make pesto,
  • sautée beetroot leaves with EVOO, garlic and chili,
  • use grated broccoli stems in fried rice, pasta sauce, soups…
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Vitamin D and your brain

In the UK, vitamin D deficiency affects 23% of adults (21% in those over 65yo), in winter the prevalence even rises to 40% (29% in those over 65yo). Vitamin D is mainly known for its role in the regulation of calcium homeostasis and in bone integrity, but it also plays an important role in the brain and is even considered neuroprotective.

Vitamin D promotes amyloid metabolism and clearance, neuronal and synaptic growth and neurotransmission. Many studies show the association between low vitamin D status and cognitive impairment associated with ageing (dementia). More recently, a study looked at vitamin D in 4 areas of the brain, 2 associated with Alzheimer, 1 with dementia and 1 with no association to cognitive decline. They found that high concentration of vitamin D in the 4 areas were correlated with better cognitive function. In another study, MR analyses suggested a causal effect of vitamin D deficiency on dementia.

The exact mechanisms by which vitamin D acts on cerebral health are not yet elucidated, but one thing is certain: whether it is for your bones or brain, take your daily 10 microgram vitamin D supplement between October and March.

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The chemistry of coffee (polyphenols) and milk (amino acids)

Perhaps you came across this research in the news: adding milk to coffee would increase the anti-inflammatory effects of the later. The study is called Phenolic Acid–Amino Acid Adducts Exert Distinct Immunomodulatory Effects in Macrophages Compared to Parent Phenolic Acids – yes it is a bit cryptic!

The study looks at how the amino acids contained in milk combine with the polyphenols (anti-oxidants) naturally occurring in coffee. The scientists found that « as a polyphenol reacts with an amino acid, its inhibitory effect on inflammation in immune cells is enhanced », and this happens in milky coffee drinks. This association likely has the beneficial effect of fighting inflammation.

These results were observed in-vitro, and the University of Copenhagen who led the research, is already planning to investigate in animals and humans.

What this study also suggests, is that this reaction between polyphenols and amino acids occurs in other foods where proteins and fruits or vegetables are combined, for example in a smoothie.