Squalene (Shark Liver / Olive)

Squalene is a triterpene compound that serves as a cholesterol precursor and powerful antioxidant, naturally found in shark liver oil and olive oil. It enhances skin barrier function through ceramide synthesis and supports cardiovascular health by modulating cholesterol metabolism via the mevalonate pathway.

Origin & History

Squalene is a natural organic compound originally sourced from shark liver oil but now also extracted from olives and other plant sources for sustainability.

Historical & Cultural Context

Squalene has been used in traditional medicine, particularly in Japan, where it is believed to promote health and longevity.

Health Benefits

- Enhances skin health by providing antioxidants, reducing oxidative stress and promoting a radiant complexion. - Supports heart health by lowering LDL cholesterol, reducing cardiovascular disease risk. - Boosts immune function by enhancing white blood cell activity, improving pathogen defense. - Promotes joint lubrication by increasing synovial fluid production, enhancing mobility. - Supports liver health by aiding in detoxification processes, improving metabolic efficiency. - Improves energy levels by enhancing mitochondrial function, reducing fatigue. - Supports brain health by protecting neurons, improving cognitive function and memory.

How It Works

Squalene functions as an intermediate in the cholesterol biosynthesis pathway, converting to squalene epoxide via squalene epoxidase enzyme. It enhances skin barrier function by promoting ceramide and cholesterol synthesis in keratinocytes. The compound also exhibits antioxidant properties by scavenging free radicals and reducing lipid peroxidation through its unsaturated carbon structure.

Scientific Research

Research supports squalene's role as an emollient and antioxidant, with studies indicating its efficacy in skin hydration and protection.

Clinical Summary

Human studies on squalene supplementation are limited, with most research focusing on topical applications. A 12-week study of 30 participants showed 23% improvement in skin hydration with topical squalene application. Cardiovascular studies primarily involve observational data linking dietary squalene intake to improved lipid profiles. Most immune function research comes from in vitro and animal studies, with human clinical evidence remaining preliminary.

Nutritional Profile

Squalene is a triterpene hydrocarbon (C30H50) and polyunsaturated lipid, not a traditional macronutrient source. Key compositional data: Pure squalene is 100% lipid by weight with no protein, carbohydrate, fiber, or micronutrient content in isolated form. Bioactive compounds: Squalene itself is the primary bioactive at ~100% concentration in refined extract. In shark liver oil, squalene concentrations range from 40–80% of total oil content, alongside alkylglycerols (1–10%) and fatty acids including oleic acid (C18:1), palmitic acid (C16:0), and trace omega-3 fatty acids (EPA, DHA <5%). In olive oil, squalene is present at 200–700 mg per 100g (approximately 0.2–0.7%), alongside oleocanthal, oleuropein, tocopherols (vitamin E: ~14mg/100g), and polyphenols. Molecular weight of squalene: 410.72 g/mol. As an antioxidant precursor, squalene is an intermediate in cholesterol and sterol biosynthesis (via the mevalonate pathway), converting to squalene epoxide. Bioavailability: Orally administered squalene demonstrates approximately 60–70% intestinal absorption in human studies; it is incorporated into chylomicrons and lipoproteins (primarily VLDL and LDL fractions) post-absorption. Skin absorption is high due to squalene being a natural component of human sebum (approximately 12–15% of sebum composition). No significant vitamin, mineral, or fiber content is present in isolated squalene compound form.

Preparation & Dosage

The recommended oral dosage is 500 mg to 1,000 mg per day. Consult a healthcare provider before use.

Synergy & Pairings

Vitamin A, Coenzyme Q10, Omega-3

Safety & Interactions

Squalene is generally well-tolerated with minimal reported side effects when used topically or consumed in normal dietary amounts. Shark-derived squalene may pose sustainability concerns, making plant-based alternatives preferable. High-dose supplementation may theoretically interact with statin medications due to cholesterol pathway involvement. Pregnancy and breastfeeding safety data is limited, requiring medical consultation before use.