Research
Macro partitioning
A low-carbohydrate diet preserves HDL cholesterol levels better than a conventional low-fat diet in severely obese adults, independent of weight loss.
Switching to a low-carbohydrate diet can help maintain your 'good' HDL cholesterol levels, which tend to drop on low-fat diets. This is a specific metabolic benefit that occurs even if your weight loss is the same as on a low-fat diet.
GoodSupportsHIGH confidence
High-density lipoprotein cholesterol levels decreased less (P < 0.025)... The difference in mean HDL cholesterol response between diet groups remained significant after adjustment for both baseline variables and weight loss (P < 0.028).
Why this rating
RCT with statistical adjustment for weight loss confirms the effect is diet-specific.
Source
The Effects of Low-Carbohydrate versus Conventional Weight Loss Diets in Severely Obese Adults: One-Year Follow-up of a Randomized Trial
Linda Stern et al. · Annals of Internal Medicine · 2004
DOI 10.7326/0003-4819-140-10-200405180-00007
rct · n=132Cited 810×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- In severely obese adults with high prevalence of diabetes or metabolic syndrome, a low-carbohydrate diet (<30g carbs/day) produces more favorable metabolic outcomes (lower triglycerides, preserved HDL, improved HbA1c in diabetics) than a conventional low-fat diet, despite similar weight loss.Good
- In patients with diabetes, a low-carbohydrate diet improves hemoglobin A1c levels more than a conventional low-fat diet, independent of weight loss.Moderate
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