Collagen: Why the Beauty Trend Is Usually a Waste of Money

Collagen is marketed in adverts as a miniature fountain of youth: a drink in the morning, a cream at night, powder in a smoothie – and flawless, wrinkle-free skin is supposedly yours. A closer look quickly reveals that the claims are far more ambitious than current research supports. Research findings, how collagen works and the potential risks all suggest that, for most people, this fashionable protein is more likely to waste money than transform their routine.

What collagen actually does in the body

Collagen is not an exotic beauty ingredient; it is one of the body’s key structural proteins. It accounts for roughly one third of all protein in the human body. Its fibrous structures are found throughout the:

• skin – helping it remain supple and resilient
• bones – providing a stable underlying framework
• tendons and ligaments – enabling them to withstand strain more effectively
• cartilage – allowing joints to cushion impacts

The body makes its own collagen. It breaks down dietary protein into amino acids before assembling them again into new structures. Glycine, lysine and proline are especially important in this process. Provided there is enough protein, vitamins and trace elements available, this system works remarkably well.

The natural decline in collagen from your mid-twenties

From around the age of 25, the body gradually starts to reduce collagen production. The change is subtle at first, but becomes more noticeable over time:

• the first fine lines around the eyes and mouth
• reduced firmness, particularly on the face and décolletage
• skin that appears drier at the surface
• small wounds taking longer to heal

This is precisely where beauty companies step in. Their message is simple: if the body produces less collagen, they will provide it from outside. It is an appealing idea, but biochemically it works far less elegantly than advertising suggests.

“The issue with collagen products is not the substance itself, but the expectation that it will end up specifically where wrinkles develop.”

Collagen creams remain on the skin’s surface

Many brands rely on collagen creams, serums and masks. They claim that the fibres plump wrinkles from the outside and leave skin smoother. In reality, the situation is different:

• Collagen molecules are too large to cross the skin barrier.
• They largely remain on the skin’s outer surface.
• The result is similar to that of a standard moisturiser: skin looks temporarily plumper because moisture is retained.

This may feel pleasant and can make skin look fresher for a few hours. However, it has very little to do with genuinely stimulating collagen production in deeper layers of the skin.

Drinking or taking collagen: high hopes, limited evidence

Drinking shots, powders and capsules are the other major collagen trend. The reasoning is that, if the skin barrier is an obstacle, collagen can simply be sent through the stomach instead. Yet the body follows its usual process here as well.

Protein – whether it comes from steak, lentils or collagen powder – is broken down into smaller components in the digestive system. These enter the bloodstream and are then available wherever cells currently need protein. The body does not follow marketing claims. It allocates the building blocks according to demand: skin, muscles, liver and bones – whichever needs them first receives them.

Studies do indicate that certain collagen supplements may have very small effects on skin hydration and elasticity. However, the evidence base is limited, with trials often involving small groups, short time frames and links to manufacturers. There is no clear proof of visible anti-ageing results.

“Whether swallowed collagen is actually incorporated specifically into facial skin or joints remains largely speculative at present.”

Does the body need extra collagen at all?

There is no general evidence that healthy people require additional collagen. Anyone who eats a balanced diet and consumes sufficient protein already provides the body with the necessary building blocks. For most people, better choices than expensive powders include:

• enough protein from fish, meat, eggs, pulses and dairy products
• vitamin C from fruit and vegetables, as it contributes to collagen formation
• avoiding nicotine, because smoking damages collagen structures
• consistent UV protection to slow light-induced collagen breakdown

Anyone who still chooses collagen supplements should at least pay attention to the quantity. The Federal Institute for Risk Assessment identifies five grams per day as a sensible upper limit.

Risks and side effects: not every product is harmless

Collagen is considered relatively well tolerated, but the trend is not entirely without risk. Potential problems include:

• allergic reactions to animal-derived ingredients
• skin redness and a sensation of heat caused by nicotinic acid in some supplements
• contamination in lower-quality products

People with existing health conditions, those who take medication regularly or those who are pregnant should not generally use supplements without first consulting a doctor. The collagen’s source matters too: beef, fish or pork will not suit everyone, and not every source is monitored to the same standard.

Why collagen powder remains a bestseller

Despite the weak evidence, the market continues to boom. Practical tests show that tubs and jars sell extremely well, even though the advertised benefits have little scientific backing. The reasons are obvious:

• The promise of “beauty you can drink” sounds simple and convenient.
• Before-and-after images on social media create powerful expectations.
• Many consumers want to feel in control of the ageing process.
• Price is often equated with “quality” – higher cost can seem more credible.

Comparative tests reveal substantial differences between products. Some suppliers clearly state the origin, collagen type, dosage and additives, while others remain vague. Purity, transparent labelling and a realistic assessment of value for money are missing more often than might be expected.

What actually helps with wrinkles

Anyone who notices the first lines on their face understandably wants to take action. Rather than relying blindly on collagen, it is worth considering measures with better-supported effects:

• daily sunscreen with a high sun protection factor
• retinoids in skincare, such as retinol at an appropriate concentration
• regular moisturising skincare containing hyaluronic acid or glycerine
• sufficient sleep and reduced stress
• little alcohol and no nicotine

Medical aesthetic treatments such as laser procedures, microneedling or minimally invasive interventions affect collagen structures more directly, but also carry their own risks and costs. Anyone considering them needs reputable medical advice and should not rely on social-media trends.

How to assess advertising claims more effectively

Collagen beauty products are unlikely to disappear from shop shelves any time soon. That makes it all the more useful to examine the small print critically. A few questions can help:

• Are there independent studies, or only information from the manufacturer?
• Are specific percentage effects promised, and what evidence supports them?
• Is it clearly stated which ingredients are included and in what amounts?
• Does the wording sound scientifically sound, or more like an advertising slogan?

Keeping these questions in mind makes it less likely that you will choose an expensive placebo. Collagen remains a fascinating molecule in the body, but based on current research it is hardly suitable as the supposed cure-all in the bathroom cabinet.