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Why Can These Children Not Eat Oil Even a Single Spoonful?

In a world where fat is the main source of energy, there is a small group of humans whose bodies view every drop of oil as a deadly threat. They are born with a 'locked' gene — not a dietary mistake, not an allergy, but a rare genetic defect that completely eliminates the fat-burning enzyme. What happens if the body cannot process triglycerides — and why must doctors prohibit coconut oil from the very first day of birth?

30 Jun 20264 min read0 viewsBy Redaksi KhatulistiwaWikipedia — Lipoprotein lipase deficiency
Why Can These Children Not Eat Oil Even a Single Spoonful?
Image: Foto: Wikipedia — Lipoprotein lipase deficiency (CC BY-SA 4.0)
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What is lipoprotein lipase — and why is it not just a 'common enzyme'?

Imagine lipoprotein lipase (LPL) as the main gatekeeper at the capillary wall — where fat from food (carried in the form of chylomicrons) must be 'checked' and broken down into free fatty acids before entering muscle or fat cells. Without LPL, chylomicrons cannot be opened. They float freely in the blood like cargo ships without a port — swelling, clogging, and releasing toxic substances. This enzyme is not just a digestive helper; it is the determinant of life for fat control. And in patients with LPL deficiency, this enzyme is entirely absent — not less, not weak, but completely missing due to a homozygous mutation in the LPL gene on chromosome 8.

Why do symptoms appear in infancy — and not in adulthood?

Most metabolic disorders appear later in life: type 2 diabetes in the 40s, hypercholesterolemia in the 50s. But LPL deficiency is different. The first symptoms often appear in the first week of life: repeated vomiting, weight loss, and breast milk or formula that appears 'oily' or greasy — a sign that plasma triglycerides exceed 1,000 mg/dL (normal: <150 mg/dL). By age 1–2 years, subcutaneous fat nodules (xanthoma eruptive) appear on the back, shoulders, and knees — not regular fat, but clusters of macrophages that have ingested ruptured chylomicrons. This is not obesity; it is toxic fat accumulation outside fat cells.

Why is abdominal pain not just a 'digestive issue' — but a warning sign of the pancreas?

Plasma triglycerides >2,000 mg/dL increase the risk of acute pancreatitis by more than 50 times. Why? The accumulated chylomicrons stimulate pancreatic cells to produce excessive pancreatic lipase — which then 'turns around' and digests the pancreatic tissue itself. The first attack can occur before age 5, with symptoms such as severe abdominal pain, green vomiting, and fever without infection. In a 2022 cohort study (JAMA Pediatrics), 73% of patients with LPL deficiency experienced at least one episode of pancreatitis before adolescence — and 22% had chronic pancreatic damage before age 12.

Why is the daily fat limit not 30g or 50g — but less than 20 grams, and why is coconut oil also prohibited?

The 20g daily fat limit is not a guess. It is based on the maximum amount of free fatty acids still transportable through alternative pathways (such as medium-chain triglycerides/MCT), without relying on LPL. However, MCTs cannot be used freely — because the livers of these patients already suffer from steatosis (fat accumulation) due to chronic metabolic imbalance. Coconut oil? Although rich in MCTs, it contains 6–8% long-chain fatty acids (such as lauric acid) that still depend on LPL for breakdown. One teaspoon of coconut oil (5g) can contain up to 0.4g of long-chain fatty acids — enough to trigger a triglyceride spike within 6–8 hours in sensitive patients. At a reference center in Zurich, patients who violated this limit showed an average triglyceride increase of 1,800 mg/dL within 24 hours.

Are new drugs or gene therapy available — or are we still relying on a strict diet?

Until 2024, no FDA- or EMA-approved drug was available for LPL deficiency. Alipogene tiparvovec — the first gene therapy vector for this disease — was approved in the EU in 2012, but withdrawn in 2021 due to inconsistent long-term effectiveness and production costs exceeding RM1.2 million per dose. Now, the main focus is on exogenous enzyme replacement therapy (such as ARO-APOC3, in phase III clinical trials) and RNA modulators that suppress apoC-III production — the main barrier to remaining LPL activity. But for now, the only intervention proven to save lives — and prevent pancreatic damage — remains a strict diet under the supervision of a certified clinical nutritionist specializing in metabolic genetics. Not just 'eating healthy,' but a daily design that calculates every milligram of fat from milk, vegetables, and even boiled chicken broth.

If all fats are avoided, where does the energy come from — and can patients live a normal life?

Yes — with proper support. Energy is obtained through complex carbohydrates (oats, potatoes, brown rice without oil), lean protein (egg whites, skinless chicken, freshwater fish), and fat-soluble vitamin supplements (A, D, E, K) in microemulsion form — since normal absorption is impaired. A longitudinal study at the University of Montreal (2023) showed that patients who started a diet of <20g fat before <6 months of age had an average IQ of 98 ± 7 — equivalent to the general population — and 89% completed higher education. They are not 'less energetic'; they are the strongest example that the human body can adapt — not by changing genes, but by respecting its biological limits precisely, consistently, and wisely.

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Reference: Lipoprotein lipase deficiency — Wikipedia

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