The Healthspan Map · Nutrient
Added Sugars
Linked to getting too much
| Nutrient or lever | Direction | Strength | Evidence type | What was found | Source |
|---|---|---|---|---|---|
| Added Sugars | Don't overdo | Moderate | RCT / meta-analysis | High added-sugar/ultra-processed intake is associated with greater anxiety symptoms. | Lane et al. 2022 (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | Cohort / observational | High added-sugar loads produce larger post-meal glucose dips, predicting lower alertness and an energy crash. | Postprandial glucose-dip & alertness study (PREDICT) (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | RCT / meta-analysis | High added-sugar/ultra-processed intake is associated with greater depression risk (OR 1.44; HR 1.22). | Lane et al. 2022 (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | RCT / meta-analysis | Excess free sugars/fructose drive osmotic diarrhoea, gas and bloating. | Free sugars & osmotic/fermentation GI (opens in a new tab) |
| Added Sugars | Don't overdo | Emerging | Review / narrative | Sugar-sweetened foods and beverages are associated with higher blood pressure. | Dietary/PA approaches to BP (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | Review / narrative | Added sugars and refined carbohydrate raise triglycerides and lower HDL. | Lifestyle & lipids (Endotext) (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | RCT / trial | Higher sugar intake is associated with more nighttime arousals and lighter, less restorative sleep. | St-Onge et al. 2016, J Clin Sleep Med (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | Systematic review | Higher sugar intake tracks with greater osteoarthritis pain severity through a more pro-inflammatory diet. | Nutrition & chronic musculoskeletal pain (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | RCT / meta-analysis | Excess added sugar, especially in liquid form, promotes weight gain through low satiety and incomplete calorie compensation. | SSB & weight meta (AJCN 2023) (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | RCT / meta-analysis | Added sugars drive the blood-glucose spikes that damage peripheral nerves. | Glucose & nerve damage (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | Review / narrative | High glycemic load and sugary intake raise insulin/androgens and are associated with ovulatory infertility, PCOS and lower fertility potential. | Female infertility & diet (Frontiers Nutr 2022) (opens in a new tab) |
| Added Sugars | Don't overdo | Emerging | Review / narrative | High added-sugar intake is associated with transient impairment of neutrophil/immune function and pro-inflammatory load. | Multivitamin-mineral & respiratory infection (PMC12310427) (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | Review / narrative | Excess added sugar drives AGE formation that cross-links and stiffens collagen, accelerating skin ageing. | "Diet and Skin Aging - From the Perspective of Food Nutrition", Nutrients 2020 (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | RCT / meta-analysis | High added-sugar/ultra-processed intake associates with greater stress and mental-disorder symptoms. | Lane et al. 2022 (opens in a new tab) |
| Added Sugars | Don't overdo | Emerging | Review / narrative | Blood-sugar swings from sugary foods may aggravate tinnitus through metabolic and vascular effects - emerging. | Blood sugar & tinnitus (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | RCT / meta-analysis | Added sugar raises diabetes risk mainly through sugary beverages; total added sugar in aggregate shows little independent effect - the beverage form is the harm. | Dietary sugar & T2D meta (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | Cohort / observational | Added sugars and high glycemic load raise diabetic-retinopathy and AMD risk through hyperglycemia-driven vascular and oxidative damage. | Modifiable lifestyle & AMD review (PMC11946629) (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | Cohort / observational | High added-sugar intake raises CRP/IL-6 via NF-kB and glycation. | "The association between sugar-sweetened beverages intake, body mass index, and inflammation in US adults", Int J Public Health 2020 (opens in a new tab) |
| Added Sugars | Don't overdo | Strong | Established clinical | Added/free sugars are the single most important risk factor for dental caries - the most prevalent noncommunicable disease worldwide (2.5 billion people). (Oral cavity mapped under GI.) | WHO — Guideline: Sugars intake for adults and children (opens in a new tab) |
| Added Sugars | Don't overdo | Strong | Systematic review | Added/free sugars are the single most important risk factor for dental caries - the most prevalent noncommunicable disease worldwide (2.5 billion people). (Oral cavity mapped under GI.) | Effect on caries of restricting sugars intake: systematic review to inform WHO guidelines, J Dent Res 2014 (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | Cohort / observational | A higher share of calories from added sugar is associated with substantially increased cardiovascular-disease mortality; sugary drinks also raise blood pressure. | Added-sugar CVD-mortality cohorts (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | Established clinical | Excess added sugars and fructose drive hepatic fat production and steatosis; guidelines advise limiting them. | AGA lifestyle guidance (MASLD/NAFLD) (opens in a new tab) |