Key result
Higher α-linolenic and linoleic acids link to lower carotid wall thickness, whereas oleic acid links higher.
Why the study?
Intake questionnaires and routine lipid panels do not indicate fatty-acid composition, and minimally invasive dried blood spot whole-blood profiling had not yet been linked to a vascular structural endpoint.
Does dried blood spot whole-blood fatty-acid composition track maximum carotid wall thickness in Chinese adults with metabolic-risk features and established carotid structural involvement?
Cross-Sectional (n=230)
Does dried blood spot whole-blood fatty-acid composition track maximum carotid wall thickness in Chinese adults with metabolic-risk features and established carotid structural involvement?
This cross-sectional study provides the first evidence linking dried blood spot fatty-acid compositional profiles—specifically lower alpha-linolenic and linoleic acids and higher oleic acid—to increased carotid wall thickness in adults with established carotid structural involvement.
Fatty-acid profiles track carotid wall thickness; hypothesis-generating and should not yet change practice.
Background/Objectives: Questionnaires regarding intake and routine lipid panels do not indicate fatty-acid composition. Dried blood spot (DBS) whole-blood profiling is a minimally invasive complement not yet linked to a vascular structural endpoint. We tested whether DBS composition tracks carotid wall burden in Chinese adults with metabolic-risk features and established carotid structural involvement using a prespecified panel and compositional analysis. Methods: Fasting DBS gas chromatography resolved 37 fatty acids in 230 adults (47.4% men) meeting a prespecified maximum carotid wall thickness (max-CWT) ≥ 1.0 mm eligibility criterion. A total of 16 prespecified measures were modelled against ln(max-CWT) with multivariable adjustment and Benjamini–Hochberg correction pooled across 16 tests; the 26-part composition was examined by isometric log-ratio (ILR) analysis. Results: Under pooled false-discovery-rate control, α-linolenic acid (ALA) and linoleic acid (LA) were inversely and oleic acid positively associated with max-CWT (per 1-SD β = −0.063, −0.068 and 0.080; all q < 0.05). The full composition was associated (F(25,196) = 2.26, p = 0.0011), whereas EPA and the AA/EPA ratio remained weaker, family-level signals. Conclusions: To our knowledge, this is the first dual-route DBS compositional analysis linked to a structural vascular endpoint, and it identified a candidate nutritional–metabolic pattern—lower ALA and LA and higher oleic acid—linked to wall thickness in adults with established structural involvement. This pattern warrants prospective investigation and does not by itself support any dietary recommendation.
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Ma et al. (2026) conducted a cross-sectional in Carotid structural involvement with metabolic-risk features (n=230). Dried blood spot (DBS) whole-blood fatty-acid composition was evaluated on Log-transformed maximum carotid wall thickness, ln(max-CWT) (ALA per 1-SD β = -0.063, LA per 1-SD β = -0.068, oleic acid per 1-SD β = 0.080; full composition F(25,196) = 2.26, p=0.0011 (for full composition); q < 0.05 (for ALA, LA, and oleic acid)). Dried blood spot α-linolenic (β=-0.063) and linoleic (β=-0.068) acids were inversely and oleic acid (β=0.080) positively associated with maximum carotid wall thickness (all q<0.05).
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