Research continues to highlight the importance of dietary fibre in maintaining optimal health, with a recent focus on a method known as fibre layering. This approach, which involves consuming various types of fibre throughout the day, has gained support from healthcare professionals and dietitians. The goal is to enhance gut health and manage cholesterol levels more effectively.
Fibre layering does not have a strict medical definition, but it is commonly understood as incorporating different fibre sources across meals. According to Bridget Benelam, a scientist at the British Nutrition Foundation, “We may think of fibre as being this homogenous roughage, but really, it’s lots of different compounds that do quite distinct things.”
Fibre is a carbohydrate found in plant foods and is widely recognized for its health benefits. It aids in digestion, prevents constipation, and may lower harmful cholesterol levels, thus helping to reduce the risk of heart disease. Despite these benefits, many individuals struggle to consume the recommended 30g of fibre daily. For reference, a slice of wholemeal bread contains about 2g, while a banana provides around 3g. On average, individuals in the UK consume only 18g of fibre each day.
To achieve the recommended intake, some experts suggest that fibre consumption should be spread evenly throughout the day rather than consumed in a single meal. Nutritional therapist Anna Mapson from Goodness Me Nutrition explains, “If you hit your 30g of fibre in one meal, that can overload your capacity to break it down. It’s quite a lot for your body to process. So ideally, splitting it between your three meals a day is helpful.”
The experience of Ella Rauen-Prestes illustrates the potential benefits of fibre layering. After losing both her father and grandfather to heart disease, Rauen-Prestes was motivated to improve her health following a blood test that indicated high levels of “bad cholesterol.” Over the past three years, she has adopted this dietary approach, focusing on smoothies made with oat bran, chia seeds, and frozen berries for breakfast, along with a varied lunch and dinner featuring vegetables, beans, lentils, and whole grains.
Rauen-Prestes shared her success story, highlighting that her cholesterol levels decreased from 3.3 to 2.7 millimoles per litre, placing her within the healthy range. “There was this overwhelming sense of relief,” she stated. “Now I know my DNA doesn’t have to be my destiny.”
Understanding the different types of fibre is crucial for optimizing health. The main categories include:
1. **Insoluble Fibre**: This type cannot be digested in the gut and passes through unchanged. It adds bulk to stool and helps with bowel movements. Sources include nuts, seeds, and whole grains.
2. **Fermentable Fibre**: This fibre is not digestible by human enzymes but serves as food for gut bacteria. It produces short-chain fatty acids that may reduce inflammation. Found in foods like onions, garlic, and bananas, fermentable fibre is sometimes referred to as prebiotics.
3. **Resistant Starch**: Occurring naturally in some plants, such as unripe bananas, this type can also be created by cooking and cooling starchy foods like potatoes. It aids in blood sugar regulation and feeds gut bacteria.
4. **Viscous Fibre**: This includes beta-glucans, which form a gel-like substance that can help lower cholesterol. By binding to bile salts in the gut, viscous fibre encourages the body to use cholesterol to produce more bile salts, thus reducing blood cholesterol levels.
Dietitians emphasize the importance of diversifying fibre sources. Bahee Van de Bor, a spokesperson for the British Dietetic Association, stated, “If you’re only relying on breads and cereals, then you’re missing out on other types of fibres from, say, fruit, vegetables, nuts, and seeds.”
With the growing awareness of fibre’s role in health, the practice of fibre layering may be an effective strategy for individuals looking to improve their diet and overall wellness. As Rauen-Prestes noted, her journey highlights that nutritional changes can lead to significant health outcomes, reinforcing the adage that “you are what you eat.”
