Type 2 diabetes and prediabetes have become major public health issues in Ireland. Diabetes Ireland estimates that over 225,000 people in Ireland have diabetes (most with Type 2), and a further 300,000 may have prediabetes — meaning their blood sugar is elevated but not yet at the diabetic threshold. Behind these numbers are complex interactions of genetics, lifestyle, diet, and metabolic health.
Alongside evidence-based medical treatment, many Irish people living with type 2 diabetes or prediabetes are interested in how nutrition, lifestyle, and specific natural compounds might help support healthy blood sugar regulation. This guide explores what the evidence shows — while being unambiguously clear that medical management by a GP or specialist must always come first.
Before discussing any supplements, it's critical to emphasise that diet and lifestyle changes are, by a wide margin, the most evidence-based tools for managing blood sugar and potentially reversing prediabetes. Major clinical trials — including the landmark Diabetes Prevention Program study — have shown that structured lifestyle interventions combining moderate dietary change with regular physical activity reduced progression from prediabetes to diabetes by 58%.
The key dietary principles supported by strong evidence include:
Cinnamon (Cinnamomum verum and Cinnamomum cassia) has been studied extensively for its potential to support healthy blood sugar levels. Several mechanisms have been proposed, including improving insulin sensitivity, slowing gastric emptying, and reducing post-meal blood sugar spikes.
A number of clinical trials have found that cinnamon supplementation may modestly reduce fasting blood glucose and HbA1c (the three-month blood sugar average) in people with type 2 diabetes. Results across trials are mixed, but the evidence is encouraging enough to make cinnamon a commonly recommended dietary addition by naturopaths.
Important note: Ceylon cinnamon (true cinnamon) is preferred over cassia cinnamon for regular supplementation because cassia contains higher levels of coumarin, which can be hard on the liver in large amounts. Ceylon cinnamon supplements at 1–3g daily are what most studies have used. Adding cinnamon to porridge, yogurt, or herbal tea is a practical, food-first approach.
Berberine is a plant alkaloid found in barberry, goldenseal, and several other plants. It has attracted considerable scientific interest for blood sugar management — multiple clinical trials have found it may reduce fasting blood glucose, post-meal blood sugar, and HbA1c comparably to the diabetes drug metformin in some studies. Its proposed mechanism involves activating AMPK, a cellular energy sensor that improves glucose uptake and insulin sensitivity.
Berberine is one of the more potent natural compounds used by naturopaths for blood sugar support, which also means it's one that requires more careful handling:
Anyone taking diabetes medication who is considering berberine must discuss this with their GP first. Blood glucose monitoring should be increased when starting berberine alongside medication.
Chromium is a trace mineral that enhances the action of insulin — it is a component of a molecule called "chromodulin" that potentiates insulin signalling. Chromium insufficiency is associated with impaired glucose tolerance, and the typical Irish diet may be low in chromium (soil levels in Ireland tend to be low; refining grains removes chromium).
Clinical trials on chromium supplementation for blood sugar have produced mixed results, but some positive findings exist, particularly for people who are chromium-insufficient. Chromium picolinate is the most studied supplemental form. It's considered safe at recommended doses (200–1,000 mcg/day in research studies).
Alpha-lipoic acid is a powerful antioxidant that is naturally present in mitochondria (the cells' energy factories). It has been studied specifically in the context of diabetic peripheral neuropathy — the nerve damage that can occur as a complication of long-standing high blood sugar. German research over several decades has investigated intravenous and oral ALA for this indication, with generally positive results.
ALA may also have modest benefits for insulin sensitivity. It is considered safe at typical supplemental doses (300–600 mg/day for oral use) and is well-regarded in the naturopathic toolkit for diabetes support.
Magnesium deficiency is significantly more prevalent in people with type 2 diabetes than in the general population, and low magnesium is associated with poorer blood sugar control and increased insulin resistance. This creates a self-reinforcing cycle: high blood sugar increases magnesium excretion through the kidneys, worsening deficiency.
Dietary magnesium sources include dark green vegetables, nuts (particularly almonds and cashews), seeds, legumes, and dark chocolate. Given that many Irish people have suboptimal magnesium intake, a supplement of 300–400 mg/day (glycinate or malate form for good absorption) is a reasonable consideration alongside diet.
Soluble dietary fibre slows gastric emptying and the absorption of glucose, reducing post-meal blood sugar spikes. It also feeds beneficial gut bacteria and improves cholesterol profiles. Irish people have easy access to excellent fibre sources:
Regular physical activity improves insulin sensitivity independently of weight loss. Walking 30 minutes daily after meals is one of the simplest and most effective blood sugar management strategies available — and perfectly suited to the Irish landscape. Strength training (resistance exercise) further improves glucose uptake by muscles.
This guide is general information only. Diabetes and prediabetes require medical diagnosis and management. See your GP urgently if you experience excessive thirst, frequent urination, unexplained fatigue, blurred vision, or slow-healing wounds — these can be symptoms of undiagnosed diabetes. If you have diabetes, maintain regular reviews with your GP or diabetes specialist. The HSE Diabetes programme provides excellent resources at hse.ie. Diabetes Ireland (diabetes.ie) offers education, support groups, and access to diabetes nurses across Ireland. Do your own research (DYOR) and always make decisions about your diabetes management in partnership with your healthcare team.
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