Reading 'Metabolic Support' on a Label: What It Legally Means
'Metabolic support' is a structure-function phrase permitted on supplement labels, and it does not require proof that the product chang
15 July 2026Read →
What metabolism is, what changes it, and why most 'boosters' cannot do what they claim.
'Metabolic support' is a structure-function phrase permitted on supplement labels, and it does not require proof that the product chang
Refeeds are planned higher-calorie or higher-carbohydrate periods used to replenish glycogen and provide a psychological break.
Mild dehydration reduces alertness, increases perceived effort and is frequently mistaken for hunger or fatigue.
Wearable devices estimate energy expenditure from heart rate and movement, and error margins of 20–50% are common.
Cold exposure activates brown adipose tissue, which generates heat and uses energy — a real physiological effect with modest practical
Curcumin is the main active compound in turmeric, studied for inflammation and metabolic markers, and famously poorly absorbed.
Resveratrol is a polyphenol found in grapes and Japanese knotweed, studied for metabolic and longevity endpoints with inconsistent huma
Alpha lipoic acid is an antioxidant involved in mitochondrial energy metabolism, studied mainly for diabetic neuropathy and modestly fo
The mid-afternoon dip combines a natural circadian trough with post-meal glucose dynamics and accumulated sleep pressure.
Persistent tiredness is far more often caused by sleep debt, iron deficiency, thyroid problems, depression, medication or under-eating
Small increases in daily movement compound into meaningful energy expenditure across weeks and months.
Muscle tissue is metabolically active and is the largest modifiable contributor to resting energy expenditure.
Metabolic adaptation is the reduction in energy expenditure that occurs beyond what body size alone predicts during weight loss.
Green tea catechins, especially EGCG, are the basis of many metabolism claims, usually studied alongside caffeine.
Caffeine produces a small, measurable, short-lived rise in energy expenditure and improves perceived exercise capacity.
The thyroid regulates metabolic rate, and both underactivity and overactivity affect weight, energy and temperature regulation.
B vitamins are cofactors in the enzymes that release energy from food — they enable the process rather than supplying energy themselves
The body oxidises fat continuously; the proportion rises at rest and during low-intensity work and falls after meals.
Mitochondria are the cellular structures where fatty acids and glucose are oxidised to produce ATP.
AMPK is an enzyme that acts as a cellular energy sensor, switching on energy-producing pathways when cellular fuel is low.
Thermogenesis is heat production by the body, including the small energy cost of digesting food and the activity of brown adipose tissu
Most 'metabolism boosters' either contain caffeine, contain researched compounds at token doses, or do nothing measurable at all.
Non-exercise activity thermogenesis is everything you burn through daily movement that is not deliberate exercise — walking, fidgeting,
Resting metabolic rate is the energy your body uses to stay alive at rest — breathing, circulation, cell maintenance and brain function
Metabolism is the sum of all chemical processes converting food into energy and building blocks, most of which happens without you noti