The idea that you can never eat too much fibre is a fascinating one, and it's no wonder it's gained traction on social media. After all, who wouldn't want to feel healthier and more energised just by adding a few more leafy greens to their diet? But is it really that simple? Let's take a closer look at the science behind this trend and see if it's all it's cracked up to be.
The Power of Fibre
Fibre is a type of carbohydrate that our bodies can't digest, and it's found in a variety of foods, including nuts, seeds, leafy greens, and beans. It's also available as a supplement. While the average Briton only eats around 16g of fibre a day, which is just a little more than the recommended amount for two- to five-year-olds, the potential benefits of increasing this intake are significant.
Dr Emily Leeming, a dietitian at King's College London and the author of Fibre Power, explains that fibre supports digestion, lowers the risk of bowel cancer and heart disease, reduces low-density lipoprotein (or 'bad') cholesterol, helps control blood sugar, and promotes fullness. And the evidence suggests that the more fibre you eat, the more benefits you may gain.
The Linear Relationship
There's a linear relationship between fibre intake and health benefits, according to Leeming. This means that as you increase your fibre intake, you're likely to see a corresponding improvement in your health. And while 30g is the most studied intake, evidence suggests that benefits may continue beyond that.
The Risks of Overdoing It
However, it's important to be cautious about increasing your fibre intake too quickly. Leeming warns that jumping from 16g to 50g can cause bloating and discomfort, as your gut needs time to adapt. Regularly consuming more than 50g can also be difficult without becoming restrictive or obsessive.
The Sweet Spot
So, where's the sweet spot? Leeming suggests that an extra 7g a day is linked to lower risk of heart disease, type 2 diabetes, and bowel cancer. Just 5g more is linked with a 5% lower risk of depression. This suggests that a gradual increase in fibre intake, combined with plenty of fluids, is the best way to reap the benefits without causing discomfort.
Listen to Your Body
Ultimately, the key to healthy eating is to listen to your body. As Leeming says, 'Healthy eating has to be enjoyable, practical, and make you feel good'. So, if you're feeling bloated or uncomfortable, it may be time to slow down and give your gut a chance to adjust. And if you're feeling energised and healthy, then you're on the right track.
In my opinion, the idea that you can never eat too much fibre is a bit of a myth. While fibre is undoubtedly beneficial, it's important to approach it with caution and to listen to your body's signals. By increasing your fibre intake gradually and drinking plenty of fluids, you can enjoy the benefits of fibre without causing yourself any discomfort.
