
There is an obvious and very treatable cause for your tiredness: your iron stores are empty, even though your blood count is still normal. On top of that, vitamin D is low and vitamin B12 is borderline, which shows in a slightly raised homocysteine. Your thyroid does not explain the symptoms. Fasting insulin and HbA1c are within the lab reference range but above the target range; this is not diabetes, but an early sign that building muscle and a regular meal structure will do more here than any diet. First refill the stores, then measure again in three months.
What was not found. No anaemia, no underactive thyroid, no sign of an inflammatory disease, kidney and liver values normal.

| Marker | Your value | Lab reference | Target | Grade | |
|---|---|---|---|---|---|
| Ferritin | 18 µg/l | 15–150 | 50–150 | M | |
| Vitamin D (25-OH) | 48 nmol/l | 50–250 | 75–125 | M | |
| Vitamin B12 | 280 pmol/l | 145–570 | above 400 | P | |
| Folate | 16 nmol/l | above 7 | above 15 | P |
These are not all treatment thresholds. Some are guideline-based (L), some rest on the study evidence (M), and some are practice ranges (P) that help with interpretation.
| Marker | Your value | Lab reference | Target | Grade | |
|---|---|---|---|---|---|
| HbA1c | 5.6% | below 5.7 | below 5.4 | P | |
| Fasting insulin | 11 mU/l | 2.6–24.9 | below 7 | P |
| Marker | Your value | Lab reference | Target | Grade | |
|---|---|---|---|---|---|
| Homocysteine | 12.4 µmol/l | below 15 | below 10 | M | |
| hs-CRP | 1.6 mg/l | below 5 | below 1 | L | |
| LDL cholesterol | 2.9 mmol/l | below 3.0 | below 3.0 | L |
| Marker | Your value | Lab reference | Target | Grade | |
|---|---|---|---|---|---|
| TSH | 1.9 mU/l | 0.27–4.2 | 0.5–2.5 | P | |
| fT4 | 15.8 pmol/l | 12–22 | 14–20 | P |
If new symptoms appear, such as palpitations, shortness of breath, severe tiredness with paleness, or blood in the stool, please get in touch straight away, not only at the next check.