Biomarker results at baseline, programme end, and follow up in the biomarker feedback group.

All figures are given as mean ± standard deviation unless otherwise stated. Negative values represent an increase between baseline and 12-week results. The paired two-tailed t-test was used to calculate 95% confidence intervals. P values were omitted with the primary focus of this study being feasibility; d = Cohen’s d. *Includes only participants for whom paired baseline and 12-week biomarker data were collected. **3 results at baseline and 1 result at 12 weeks excluded from analysis as triglycerides were too high to calculate an LDL cholesterol result. †1 participant was unwell, so anomalous hs-CRP result was excluded from analysis. ‡1 participant was found to have haemochromatosis so was excluded from analysis. LDL = low-density lipoprotein; HDL = high-density lipoprotein; TC = total cholesterol; hs-CRP = high-sensitivity C-reactive protein.