Diabetes mellitus is a group of conditions in which blood glucose remains too high. In type 1 diabetes, the immune system destroys insulin-producing cells and lifelong insulin treatment is essential. In type 2 diabetes, insulin does not work effectively or the body does not produce enough. Prediabetes describes glucose levels above the normal range but below the diagnostic threshold for diabetes.
Common symptoms include thirst, frequent urination, tiredness, blurred vision, slow-healing wounds and unexplained weight loss, although type 2 diabetes may develop gradually without obvious symptoms. Type 1 symptoms can progress quickly and require prompt medical assessment.
Persistent high glucose can damage blood vessels and nerves, affecting the eyes, kidneys, feet and cardiovascular system. Regular HbA1c, blood pressure, cholesterol, kidney, eye and foot checks are therefore part of treatment, not optional extras.
Food and movement
There is no single diabetes diet. A sustainable pattern generally includes vegetables, pulses, whole grains, fruit, protein foods and unsaturated fats, with fewer highly processed foods rich in sugar, salt and saturated fat. The original source recommends avoiding several fruits and root vegetables; routine exclusion is unnecessary. Portion, preparation and the overall meal matter more than labelling nutritious foods as forbidden.
Carbohydrate affects blood glucose, but it is also a normal source of energy. Wholegrain oats, brown rice, beans and lentils usually provide more fibre and a gentler response than sugary drinks, sweets and refined snacks. Anyone using insulin needs advice on carbohydrate estimation and medicine adjustment rather than simply eating less.
Regular activity improves insulin sensitivity. The NHS advises building towards at least 150 minutes of moderate activity across the week, adapted for health, mobility and glucose management. Weight loss can improve type 2 diabetes and sometimes achieve remission, but a strict low-calorie programme should only be undertaken with clinical supervision.
Medicines remain central
Type 1 diabetes cannot be managed through food or supplements instead of insulin. Type 2 treatment may involve metformin, an SGLT2 inhibitor, a GLP-1 medicine, insulin or other options depending on individual circumstances. Medicines should not be changed when diet or supplements change without the diabetes team’s advice because hypoglycaemia or other complications can result.
Useful supplements
Supplements should be selected for the individual rather than used automatically. Product directions and advice from an appropriately qualified professional should take precedence over general information.
| Supplement | Effects |
|---|---|
| High-potency multivitamin and mineral formula | The source describes biotin as working with insulin and supporting glucokinase, an enzyme involved in cellular glucose use. |
| Vitamin B complex | Supports carbohydrate metabolism and normal nerve and blood-vessel health. |
| Magnesium citrate | Supports cellular energy production and normal glucose regulation. |
| Krill oil or marine fish oil | Provides omega-3 fats that support cell-membrane structure and inflammatory balance. |
| Chromium | Intended to support insulin’s action in moving glucose across cell membranes. |
| Coenzyme Q10 (ubiquinol) | Intended to support carbohydrate metabolism and described as potentially lowering blood glucose. |
| Vitamin C | Described as supporting glucose tolerance, limiting sorbitol accumulation and providing antioxidant protection. |
| Natural vitamin E | Described as supporting glucose control and protecting blood vessels and nerves from oxidative damage. |
| Vitamin D3 | Intended to support insulin sensitivity and normal immune function. |
| Aloe vera juice | Described as supporting inflammatory balance, digestion and blood-glucose regulation. |
| Lecithin with plant sterols | Supports cell-membrane structure; plant sterols can reduce cholesterol absorption in the gut. |
| Spirulina or greens powder | Intended to support normal cell function as part of a green vegetable drink. |
These effects preserve the original rationale but do not mean the products treat diabetes. Several can alter glucose or interact with anticoagulants and other medicines. High-dose vitamin D or vitamin E can be harmful, chromium is not routinely recommended for glucose control, and magnesium needs caution in kidney disease.
The safest plan is coordinated: use prescribed treatment, monitor as advised, attend reviews and make dietary changes that remain nutritionally adequate. Supplements should be introduced only when the diabetes team can account for their effect alongside medicines and glucose readings.
Looking for personalised nutrition and lifestyle support? An FNTP member may be able to help you explore an approach suited to your individual needs. Find an FNTP practitioner.
This article is for general education and does not replace individual medical advice, diagnosis or treatment.
