Tiny study tests whether diet, exercise, and supplements can turn back the clock on aging

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Community-dwelling women and men (sex) aged between 55 and 70 years * low daily exercise (i.e. \<4000 steps/day on average in the last month, self-assessment) * low fruit and vegetable intake (\< 3 per day) * at risk for accelerated functional and biological aging based on the following criteria: * overweight (BMI between 25.0 and 29.9) * at least one of the following lab values or at least borderline blood pressure within the mentioned range: * HbA1c 5.7 - 6.4% (pre-diabetes) * LDL 3.4 - 4.1 mmol L-¹ or TG \> 1.7 mmol L-¹ (atherogenesis) * hs-CRP 2 - 3 mg L-¹ (low-grade inflammation) * increase in BP or borderline BP (SBP 130 - 139 / DBP 85 - 89 mmHg) * availability of a smartphone and agrees that it can be used to connect the activity tracker to the internet and consent that data from the activity tracker will be uploaded and analyzed * Ability to communicate, read and write in German * Dietary tolerability of a Mediterranean diet (e.g. vegetables, olive oil, white meat, fish, plant-based proteins) * Ability to swallow supplement capsules Exclusion Criteria: * current smoking or vaping (smoker = More than 100 cigarettes or vapes in a life-time OR quitted less than 15 years ago and smoked more than 8 pack-years OR quitted less than 10 years ago and smoked max. 8 pack-years) * current supplementation with vitamin D and/or omega-3 and/or Fruitflow® and/or Centrum Silver® Adults 50+ multivitamin and/or taking any other multi-vitamin preparate and not willing to forgo during the trial duration * prior (ever used for more than 3 months) or current intake/application of metformin and/or GLP-1 and/or SGLT-2-inhibitor. * Current or recent (previous 12 months) participation in another clinical trial, or plans of such participation during participation in this trial * Presence of the following diagnosed health conditions in the last 4 years: * cancer (except non-melanoma skin cancer) * myocardial infarction, stroke, transient ischemic attack, angina pectoris, or coronary artery intervention * renal impairment and/or liver disease * relevant/severe impairment in mobility that leads to an inability to participate in the exercise component * major visual or hearing impairment * other serious illness that would preclude participation in the intervention components * Living together with another study participant