The Healthspan Map · Nutrient

Total Sugars

Linked to getting too much

Where an excess of Total Sugars is linked — 9 sources.In the order the Map holds them: strongest evidence first. That is a statement about the evidence, not about what matters most.
Nutrient or lever	Direction	Strength	Evidence type	What was found	Source
Total Sugars	Don't overdo	Emerging	Cohort / observational	High total-sugar meals drive the glycemic swings behind post-meal fatigue.	Postprandial glucose-dip & alertness study (PREDICT) (opens in a new tab)
Total Sugars	Don't overdo	Emerging	RCT / meta-analysis	High total-sugar loads (incl. fructose/lactose) ferment and cause bloating/diarrhoea.	Fermentable sugars & bloating (opens in a new tab)
Total Sugars	Don't overdo	Moderate	RCT / meta-analysis	High free/added-sugar intake, especially from drinks and sweets, promotes weight gain; the intrinsic sugars in whole fruit and dairy are not implicated.	SSB & weight meta (AJCN 2023) (opens in a new tab)
Total Sugars	Don't overdo	Moderate	RCT / meta-analysis	A high total-sugar, high-glycemic load drives the hyperglycemia behind the commonest (diabetic) neuropathy.	Glucose & nerve damage (opens in a new tab)
Total Sugars	Don't overdo	Emerging	Review / narrative	High overall sugar intake promotes glycation and AGE accumulation in skin.	"Diet and Skin Aging - From the Perspective of Food Nutrition", Nutrients 2020 (opens in a new tab)
Total Sugars	Don't overdo	Moderate	RCT / meta-analysis	Dietary sugar raises diabetes risk when consumed as beverages; total and naturally-occurring sugars (fruit, dairy) show null or inverse associations.	Dietary sugar & T2D meta (opens in a new tab)
Total Sugars	Don't overdo	Emerging	Cohort / observational	High total sugar intake contributes to the glycemic burden implicated in retinopathy.	Modifiable lifestyle & AMD review (PMC11946629) (opens in a new tab)
Total Sugars	Don't overdo	Emerging	Review / narrative	High total-sugar/refined-carb loads promote post-prandial inflammation.	High glycaemic load & inflammation (opens in a new tab)
Total Sugars	Don't overdo	Emerging	Systematic review	High total-sugar/refined-carb loads promote post-prandial inflammation.	Association between carbohydrate quality and inflammatory markers: systematic review of observational and interventional studies, Am J Clin Nutr 2014 (opens in a new tab)