How No.2 Can Support a Longer, Healthier Life

This month we have asked Integrative Naturopath, Zoe Jaques  to talk about fibre's role in preventing disease and promoting longevity. Check out the article below:

Fibre is having a moment; and for good reason!

Once viewed simply as something that “keeps you regular,” fibre is now recognised as a foundational nutrient for longevity. Research consistently links higher fibre intake with a reduced risk of many of the chronic diseases that shorten lifespan and compromise quality of life.

From supporting metabolic and heart health to nourishing the gut microbiome and even protecting the brain, fibre plays a much broader role than most people realise.

Yet despite its importance, the majority of people fall well short of their daily fibre needs.

Longevity: Lifespan vs Healthspan

When we talk about longevity, we’re not just referring to how long we live.

We’re talking about healthspan, or the number of years we remain healthy, functional, and cognitively sharp.

Longevity is about thriving rather than merely surviving.

Nutritional strategies that support longevity tend to share a common thread: they reduce inflammation, support metabolic stability, and maintain the health of our organs and systems over time.

Fibre is one of the simplest ways to do exactly that.

Fibre and Disease Prevention

Many of the chronic diseases associated with ageing share similar underlying drivers: chronic inflammation, oxidative stress, and metabolic dysfunction.

As we age, the risk of developing conditions such as the following naturally increases:

• cardiovascular disease
• type 2 diabetes
• metabolic syndrome
• colorectal cancer
• cognitive decline

However, diet plays a powerful role in modifying that risk.

Large population studies consistently show that higher fibre intake is inversely associated with cardiovascular disease, type 2 diabetes, and colorectal cancer (1). In simple terms: the more fibre people consume, the lower their risk of developing many preventable chronic diseases.

Fibre works through several mechanisms including:

• supporting the gut microbiome
• improving cholesterol metabolism
• stabilising blood glucose levels
• reducing systemic inflammation

One of the most researched fibres for these benefits is psyllium husk, a soluble fibre derived from the seeds of Plantago ovata. Psyllium forms a gentle gel when mixed with water, allowing it to support digestion, cholesterol metabolism and blood sugar regulation simultaneously.

Gut Health: Where Fibre Begins

Many of fibre’s longevity benefits begin in the gut.

Dietary fibre acts as fuel for the gut microbiome, the trillions of bacteria living within the digestive tract. When fibre is fermented by these microbes, they produce beneficial compounds known as short-chain fatty acids, including butyrate, acetate, and propionate.
These compounds play important roles in maintaining the integrity of the gut lining, regulating immune function, and reducing inflammation.

Fibre may also play a protective role against colorectal cancer. Higher dietary fibre intake has consistently been associated with a lower risk of colorectal cancer, likely through mechanisms including improved stool transit time, binding of potential carcinogens in the gut, and the production of short-chain fatty acids such as butyrate that help support the health of colon cells (2).

Soluble fibres such as psyllium husk are particularly valuable because they are well tolerated and help create an environment where beneficial gut bacteria can thrive.

Cardiovascular Health

Heart disease remains one of the leading causes of death worldwide.

Several factors contribute to cardiovascular risk including:

• elevated cholesterol levels
• high blood pressure
• chronic inflammation
• impaired blood vessel function

Fibre can positively influence all of these.

Soluble fibres, especially psyllium, have been shown to help lower LDL cholesterol by binding bile acids in the digestive tract and increasing their excretion (3). This encourages the body to draw cholesterol from circulation to produce more bile acids, ultimately lowering blood cholesterol levels.

Fibre intake has also been associated with modest reductions in blood pressure and improved vascular function.

Over time, these effects contribute to healthier blood vessels and a lower risk of heart attack and stroke.

Metabolic Health and Blood Sugar Balance

Fibre acts as a metabolic regulator.
Soluble fibre slows the absorption of carbohydrates in the digestive tract, helping prevent rapid spikes in blood glucose and insulin.

This has several important effects:

• improved insulin sensitivity
• more stable energy levels
• reduced risk of developing type 2 diabetes

Fibre also influences satiety and appetite regulation, helping you feel fuller for longer. By slowing gastric emptying and increasing fullness after meals, fibre can support weight management over time.

Psyllium husk has been particularly well studied in this area, with clinical trials showing improvements in both post-meal blood glucose levels and cholesterol markers (4).

Fibre and Brain Health

The connection between fibre and brain health may be less obvious, but emerging research suggests it is significant.

A large prospective study in Japan found that higher dietary fibre intake was associated with a reduced risk of developing dementia, with the highest incidence seen in individuals consuming less than 10 grams of fibre per day (5).
Much of this relationship is thought to occur through the gut–brain axis.

When fibre is fermented in the gut, the short-chain fatty acids produced help regulate inflammation and immune activity throughout the body—including in the brain. These compounds may help reduce neuroinflammation, a process increasingly linked to neurodegenerative diseases.

Meeting Your Daily Fibre Needs

Most adults should aim for at least 30 grams of fibre per day, yet average intake often falls well below this.

While whole foods such as vegetables, legumes, seeds and whole grains remain the foundation of a high-fibre diet, fibre supplements can be a useful tool to help close the gap.
A psyllium husk–based fibre powder, such as No.2, offers a convenient way to increase daily fibre intake.

When introducing fibre supplements, a few principles are important:
Start low and increase gradually
This allows both your digestive system and your gut microbiome to adapt.
Hydration matters
Psyllium absorbs water and forms a gel-like consistency in the digestive tract, so adequate fluid intake is essential. Water, quite simply, keeps things moving.

A Naturopathic prospective

One of the core principles of naturopathic medicine is preventare meaning to prevent.
Rather than waiting for disease to develop, the goal is to support the body’s natural resilience through nutrition and lifestyle.

Ensuring adequate fibre intake is one of the simplest and most powerful ways to do this.
When fibre becomes a daily nutritional foundation, we support not just digestive health but the interconnected systems that influence long-term wellbeing.

In many ways, fibre helps ensure that our lifespan and healthspan move together.

The Bottom Line

By supporting the gut microbiome, cardiometabolic health, cholesterol and blood sugar balance, inflammation regulation, and brain resilience, fibre underpins many of the biological processes that influence healthy ageing.

If longevity is the goal, fibre may be one of the most simplest and overlooked tools we have.

References 

(1). Reynolds, A., Mann, J., Cummings, J., Winter, N., Mete, E., & Te Morenga, L. (2019). Carbohydrate quality and human health: A series of systematic reviews and meta-analyses. The Lancet, 393(10170), 434–445. https://doi.org/10.1016/S0140-6736(18)31809-9

(2). Hu, J., Wang, J., Li, Y., Xue, K., & Kan, J. (2023). Use of dietary fibers in reducing the risk of several cancer types: An umbrella review. Nutrients, 15(11), 2545. https://doi.org/10.3390/nu15112545 

(3). Reynolds, A. N., Akerman, A., Kumar, S., Diep Pham, H. T., Coffey, S., & Mann, J. (2022). Dietary fibre in hypertension and cardiovascular disease management: Systematic review and meta-analyses. BMC medicine, 20(1), 139. https://doi.org/10.1186/s12916-022-02328-x

(4). Nitzke, D., Czermainski, J., Rosa, C., Coghetto, C., Fernandes, S. A., & Carteri, R. B. (2024). Increasing dietary fiber intake for type 2 diabetes mellitus management: A systematic review. World journal of diabetes, 15(5), 1001–1010. https://doi.org/10.4239/wjd.v15.i5.1001

(5). Aoki, S., Yamagishi, K., Muraki, I., Kihara, T., Ishihara, J., Iso, H., Yasuda, N., Inoue, M., Tsugane, S., & Sawada, N. (2026). The dietary fiber Intake and the risk of disabling dementia: The JPHC disabling dementia study. Journal of atherosclerosis and thrombosis, 10.5551/jat.65864. Advance online publication.