Orthomolecular nutrition

The pigment that protects your cells: benefits of astaxanthin

Ortomolecular Chile · 9-minute read

Nelba Villagrán

Integrative Orthomolecular Nutritionist · Technical Manager

Have you ever wondered why salmon, shrimp, or lobsters have that distinct red-orange color? The answer lies in a pigment called astaxanthin. It is the same compound that gives flamingos their hue, and they obtain it from their diet: they consume it, they don't produce it themselves. Beyond the color, this pigment has become one of the most studied ingredients in orthomolecular nutrition for a simple reason: it is an extraordinarily potent antioxidant.

In this article, we explain, in clear language without losing scientific backing, what astaxanthin is, what it contributes to the body, what signs may appear when the body receives too few antioxidants, and why the patented Metazome liposomal technology changes how this nutrient is absorbed.

What is astaxanthin?

Think of astaxanthin as a close cousin of beta-carotene (the pigment that gives carrots their color), but more reactive: it belongs to the carotenoid family, the natural pigments responsible for the red, orange, and yellow shades in plants, algae, and marine animals. Note that it is not produced by salmon or shrimp: it is produced by microalgae, and these animals accumulate it in their flesh by feeding on them, which dyes their skin and meat that characteristic color.

The microalgae most commonly used to produce it commercially is Haematococcus pluvialis, which is capable of accumulating up to 3.8% astaxanthin in its dry biomass when under environmental stress—a sort of defense mechanism against the sun and lack of nutrients.

Astaxanthin is liposoluble, meaning it dissolves in fat rather than water (unlike vitamin C, which is water-soluble). Its molecular structure, with rings at both ends of its carbon chain, allows it to settle "from side to side" within our cell membranes, like a rod passing through a double-layer wall. Thanks to that position, it can neutralize free radicals both inside and outside the cell, something simpler antioxidants cannot do with the same efficiency.

The science behind its antioxidant power

To understand why it matters, it is best to start with the basics: a free radical is an unstable molecule that "steals" electrons from your body's cells, damaging their structure. This accumulated wear and tear is called oxidative stress, and it is behind a good part of the cellular deterioration associated with the passage of time. An antioxidant, as the name suggests, is a molecule capable of neutralizing that free radical before it causes damage.

What distinguishes astaxanthin is the magnitude of that capacity. According to a scientific review published in the journal Molecules, various studies report that natural astaxanthin is a more significant antioxidant agent than other well-known antioxidants, such as vitamin C, vitamin E, and beta-carotene.

100–500× higher ORAC capacity—a standardized way to measure how many free radicals an antioxidant can neutralize—than alpha-tocopherol (vitamin E), according to human clinical trials.

10× greater inhibitory activity against free radicals compared to reference antioxidants like lutein and lycopene.

In other words: astaxanthin is not just another antioxidant; it is one of the most efficient known to date.

Nutritional benefits according to scientific evidence

Cardiovascular

Antioxidant support for cardiovascular health

The cardiovascular system is especially sensitive to oxidative stress, as free radicals can affect circulating lipids. According to a clinical study published in Diabetes, Obesity and Metabolism, astaxanthin supplementation was associated with a reduction in cholesterol and cardiovascular risk markers in people with prediabetes and dyslipidemia.

Skin

Nutritional support for the skin

The skin is constantly exposed to UV radiation and environmental pollution, factors that generate free radicals and accelerate skin oxidative damage. A scientific review focused on dermal health highlights that there is growing evidence that astaxanthin possesses various benefits and nutraceutical applications in the field of dermatology.

Cognitive

Support for cognitive function and the nervous system

One of the most interesting biochemical features of astaxanthin is its ability to cross the blood-brain barrier, something few antioxidants can achieve. A critical review published in Nutrients indicates that it is a potent antioxidant that has been shown to be beneficial for cognitive function, given that oxidative stress is a key factor in neurodegeneration and cognitive aging.

Its ability to cross the blood-brain barrier distinguishes it from most known antioxidants.

Muscular

Support for muscle recovery and physical performance

Intense physical exercise naturally generates an increase in free radicals in muscle, which can contribute to fatigue and post-workout oxidative damage. The evidence available in clinical studies supports the line of research linking astaxanthin to the attenuation of exercise-induced muscle damage, positioning it as a useful supplement for active people and athletes.

Immune

Nutritional support for the body's defenses

The immune system also benefits from good antioxidant status, as excess free radicals can interfere with immune cell activity. The Molecules study points out that this carotenoid has significant nutraceutical applications, especially in healthy aging processes, where the immune system plays a central role.

Cellular

General antioxidant support and cellular longevity

The review in Pharmacological Research, one of the most comprehensive analyses on human clinical trials with natural astaxanthin, concludes that its unique molecular characteristics have been associated with various health benefits, suggesting its potential as a preventative nutritional contribution within a diet oriented toward healthy aging.

What happens when the body receives too few antioxidants?

Important: astaxanthin is not an essential nutrient, unlike vitamin C or iron, so there is no clinically recognized "astaxanthin deficiency syndrome." However, there is a consensus that low antioxidant intake in general is associated with increased accumulated oxidative stress, which may manifest as:

Increased feeling of fatigue or physical tiredness, especially after exercise
Skin that looks duller or is less resistant to sun exposure
Slower muscle recovery after physical activity
Greater perception of "brain fog" or difficulty concentrating
Elevated inflammatory markers in people with diets low in plant pigments

Given this landscape, incorporating sources of antioxidants, including astaxanthin, through diet or nutritional supplementation is a reasonable strategy within a healthy lifestyle, always as a complement and not as a replacement for a balanced diet.

The problem of bioavailability

Here is a key biochemical point that is often overlooked: astaxanthin is a liposoluble molecule, which means that for it to be absorbed correctly in the intestine, it needs to be accompanied by fats and an efficient transport system. Furthermore, it is highly sensitive to light, oxygen, and temperature, so it degrades easily if not protected properly.

This means that two supplements with the same amount of astaxanthin on their label can have very different real-world absorption, depending on the technology used to formulate them.

Liposomal astaxanthin with patented Metazome™ technology

To solve the problem of low bioavailability of liposoluble nutrients, there is liposomal technology: microspheres formed by a phospholipid bilayer—the same structure that makes up our cell membranes—that surrounds a core. This structural similarity facilitates more efficient nutrient absorption and delivery into the bloodstream. In the case of liposoluble nutrients like astaxanthin, vitamin D3, vitamin K2, or CoQ10, these are embedded between the hydrophobic tails of the bilayer, the fat-compatible zone.

Product · Metazome™ Technology

Liposomal Astaxanthin Metazome

Formulated with a stabilized core and nanometric particle for better nutritional absorption. 30 capsules.

View product →

What differentiates Metazome™ from a common liposomal?

A conventional liposomal keeps the active ingredient "free" within its core, usually in liquid format. The problem is that these vesicles can fuse, collapse, or leak their content, especially during drying or while passing through the acidic environment of the stomach. The patented Metazome™ technology solves this limitation by incorporating gum arabic-derived nanospheres that reinforce and organize the liposome core.

Feature	Common liposomal	Metazome™
Core stabilization	Free active, no reinforcement	Gum arabic nanospheres
Format	Liquid	Reconstitutable dry powder
Stability	Can fuse or leak	Reinforcement prevents collapse
Particle size	Variable / uncontrolled	~100–200 nm
Zeta potential	Uncontrolled	−30 to −60 mV

This control of size and surface charge is not a minor detail: the smaller the particle size, the greater the surface-to-volume ratio, which favors dissolution and absorption of the active ingredient; and a stable negative surface charge prevents the vesicles from clustering or collapsing during drying and digestive transit.

7.62×

greater bioavailability observed with Metazome™ technology compared to a conventional formulation, in a double-blind crossover study on liposomal vitamin C. Doses and the degree of bioavailability may vary according to the active ingredient and formulation. Always check the official label of each product!

The basic phospholipid bilayer structure with an aqueous core is established liposome science, valid for any brand on the market. What is distinctive and patented about Metazome™ is precisely the stabilization of that core using gum arabic nanospheres and its dry powder format, features designed to ensure that a nutrient as sensitive as astaxanthin arrives intact and is absorbed better.

Astaxanthin is one of the most studied carotenoids for its antioxidant contribution, with scientific evidence backing its nutritional role in areas such as cardiovascular health, skin, cognitive function, muscle recovery, and the body's defenses. The way a supplement is formulated, as happens with the patented Metazome™ liposomal technology, can make a relevant difference in how much of that nutrient your body actually absorbs. This content is for informational and educational purposes and does not replace the advice of a healthcare professional.

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