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What is NAD+, in plain terms?

NAD+ stands for nicotinamide adenine dinucleotide. It’s a coenzyme present in every cell, and it acts as a kind of cellular workhorse: it helps convert the food you eat into usable energy, and it fuels enzymes involved in DNA repair and the cell’s response to stress.

That basic biology is real, well-established and important. The complication is that the popular conversation around NAD+ often stretches well beyond what the science currently supports.

Why is NAD+ suddenly everywhere?

The surge in interest isn’t hard to understand. People are increasingly focused on longevity, prevention and quality of life over time, not just treating problems once they appear, but maintaining energy, mobility and resilience as they age.

NAD+ slots neatly into that conversation because it sounds scientifically credible and is tied to fundamental cellular function. Some of the most-cited early work came from Australia: researchers at UNSW Sydney, working with Harvard, showed that boosting NAD+ (via a precursor called NMN) improved DNA repair in ageing mice, a finding that drew global attention and helped kick off the modern NAD+ boom. You can read UNSW’s own write-up of that landmark research here.

Australian labs continue to investigate the NAD+ pathway today. For example, the Laboratory for Ageing Research at UNSW studies how NAD+ metabolism relates to ageing, fertility and the side effects of chemotherapy.

What does the science actually say?

Here’s where precision matters. Scientific interest in NAD+ does not automatically translate into simple consumer answers.

The current state of the evidence can be summarised fairly bluntly:

• NAD+ levels do appear to decline with age, though this varies between tissues and the picture is complex.
• Oral precursors like NMN and NR can raise NAD-related markers in human blood and some tissues. That part is reasonably well supported.
• What those raised markers mean for real-world outcomes (energy, strength, longevity, “feeling younger”) is much less certain. Human trials are mostly small and short, and results for things like muscle strength and physical function have been mixed or unimpressive.

For a balanced, evidence-first overview written for a general audience, this explainer on The Conversation is a good starting point. And Australian dietitian Tim Crowe’s review at Thinking Nutrition walks through the human trial data and concludes that, for now, the evidence for a meaningful anti-ageing benefit is largely unproven.

The honest takeaway: real, interesting science is happening, but a lot of the marketing has run ahead of what the evidence can currently support.

NAD+ and the rise of “longevity thinking”

It helps to place NAD+ inside the broader cultural shift it belongs to. People are no longer interested only in treating problems when they appear. They’re also interested in prevention, optimisation and long-term resilience.

That shift explains why NAD+ has become such a fashionable topic. It sits at the crossroads of science, ageing and aspiration. The challenge for readers is separating the credible biology from the aspirational marketing wrapped around it.

What to know before buying NAD+ or NMN products in Australia

A few practical points worth keeping in mind:

• Supplements are regulated as medicines here. In Australia, vitamins and complementary medicines (including most NAD+ and NMN products) are regulated by the Therapeutic Goods Administration (TGA). “Natural” or “available without a prescription” does not automatically mean proven or risk-free. See the TGA’s guidance on complementary medicines.
• Look for an AUST L or AUST R number on the label, and check it on the Australian Register of Therapeutic Goods. Products bought from overseas websites generally aren’t regulated by the TGA.
• Be sceptical of bold promises. Claims about reversing ageing, dramatically boosting energy, or extending lifespan go well beyond what human evidence currently supports.
• The basics still win. Regular exercise, good sleep, a balanced diet, not smoking and limiting alcohol have far stronger evidence for healthy ageing than any NAD+ product on the market today.
• Talk to a health professional before starting any supplement, especially if you’re pregnant, on medication or managing a health condition.

FAQ

What is NAD+?

NAD+ is a coenzyme involved in cellular energy metabolism and other important biological processes.

Why is NAD+ so popular in wellness?

Because it is linked to ageing, energy, and longevity, which are major interests in the wellness market.

Do NAD+ supplements or infusions work the way marketing suggests?

The evidence is still developing, and many claims go beyond what is currently established.

Are NAD+ supplements regulated in Australia?

Yes. They’re regulated as complementary medicines by the TGA. Products sold from international websites, however, often fall outside that regulation.

Continue the conversation

Curious about emerging approaches to health? Book a free discovery call to learn more about Astrid Clinic and the emerging therapies space.

Book a free discovery call

Written by: The Astrid Clinic Editorial Team

Clinically reviewed by: Nurse Liv

Published: June 2026

Peptides are one of the biggest buzzwords in modern wellness. They are mentioned in conversations about recovery, skin health, metabolism, muscle support, and ageing, often with the suggestion that they are part of the next wave of health optimisation. But despite the hype, many people are still not sure what peptides actually are.

At a basic level, peptides are short chains of amino acids. Amino acids are the building blocks of proteins, and peptides can act as signalling molecules in the body. That means they may influence a wide range of biological processes. They are being studied in scientific and medical contexts, but the public conversation often moves faster than the evidence. For a general overview of the interest around peptides and their risks and benefits, see The BRG Health article.

Part of the appeal of peptides is that they sound precise. Wellness culture has moved increasingly toward language that feels personalised, advanced, and biologically targeted. People are not just looking for “better health”; they are looking for a mechanism, a pathway, or a signal. Peptides fit that mindset perfectly. They feel modern, technical, and high-performance.

That is also why peptide content can become misleading very quickly. The word is often used as if it refers to one category with one purpose, but peptides are not a single thing. They vary widely in structure and function, and they are used in very different contexts. Some are explored in legitimate medical research. Others are marketed heavily in wellness circles with claims that outpace the science. That gap between interest and evidence is where confusion starts.

A useful way to talk about peptides is to separate curiosity from certainty. It is fair to say that peptides are an active area of research. It is also fair to say that many of the claims circulating online are broader and stronger than the current data can fully support. Recent media coverage has highlighted exactly this issue, noting that marketing claims around peptides often run ahead of the evidence, BRG.

It is also worth noting that the popularity of peptides reflects a broader cultural shift. Many people are looking for interventions that feel more targeted than generic wellness advice. They want something that sounds sophisticated, measurable, and newer than the usual sleep, exercise, and diet conversation. That desire is understandable, especially in a market crowded with wellness products and influencer recommendations. But it also means readers need help separating promising science from marketing language.

FAQ

What are peptides?

Peptides are short chains of amino acids that can act as signalling molecules in the body.

Why are peptides trending?

They are associated with recovery, ageing, and optimisation, which makes them attractive in wellness culture.

Are all peptide claims proven?

No. Some areas are being studied, but many marketing claims are stronger than the current evidence.

Why do people talk about peptides so much?

Because they sound advanced, targeted, and linked to performance and longevity.

A note

This article has been written for educational purposes only, and does not represent any clinical endorsement from Astrid Clinic.

Written by: The Astrid Clinic Editorial Team

Clinically reviewed by: Nurse Liv

Published: June 2026

Cortisol has become one of the most talked-about words in wellness. It shows up in conversations about stress, sleep, energy, weight, burnout, and even skin. On social media, it is often described as if it were the hidden cause of nearly everything that feels off, which helps explain why so many people are suddenly asking what cortisol actually does.

Cortisol is a normal hormone made by the adrenal glands. It plays an important role in helping the body respond to stress, regulate blood sugar, support metabolism, and maintain a healthy sleep-wake rhythm. In other words, cortisol is not “bad.” It is part of the body’s everyday operating system. For a clear overview of what cortisol does, see Mayo Clinic and Cleveland Clinic.

So why has cortisol become such a hot topic? Part of the answer is cultural. Many people feel stretched thin by modern life: long workdays, poor sleep, screen overload, financial pressure, and not enough time to recover. Cortisol has become a shorthand for that experience. It gives people a simple word for a much bigger problem. Recent coverage has noted how social media content often frames cortisol as the explanation for weight gain, anxiety, fatigue, and a constant sense of being “switched on” ABC.

That popularity is not surprising. Wellness culture tends to embrace ideas that feel both scientific and personal. Cortisol fits neatly into that space because it sounds technical, but the effects people care about are relatable: trouble sleeping, feeling overwhelmed, struggling to recover, or feeling flat after prolonged stress. The problem is that social media often turns a complex hormone into a villain. That can create confusion and unrealistic expectations about what is actually happening in the body.

It helps to think about cortisol in balance rather than extremes. Cortisol naturally rises in the morning and falls at night. That daily rhythm supports alertness during the day and rest at night. Stress can affect that pattern, but a lot of the online conversation skips over that nuance. Instead of asking, “How do I crush cortisol?” a more useful question is, “What is affecting my stress load and recovery?” That shift matters because health is influenced by many interacting factors, not one hormone alone.

If you are writing about cortisol for a wellness audience, the safest and most useful angle is education. Readers generally want to understand why they feel wired, tired, or stuck. They do not need dramatic claims. They need a clear explanation of how stress, sleep, movement, nutrition, routine, and recovery all connect. A grounded article can help people make sense of their experience without feeding fear.

The most practical message is also the least glamorous. Simple habits often matter more than extreme interventions. Consistent sleep, regular movement, balanced meals, time away from screens, and intentional downtime all support better stress regulation. These are not quick fixes, but they are the foundation. If cortisol content has exploded, it is partly because people are hungry for language that explains why they feel out of sync. Good writing should meet that curiosity without oversimplifying it.

For Astrid, this topic can perform well because it is both timely and familiar. It allows the clinic to speak to a broad audience interested in stress and wellbeing while keeping the conversation general, informative, and safe. That makes it a strong first pillar article: accessible enough for everyday readers, but useful enough to build trust.

In short, cortisol is not the enemy. It is a normal hormone that becomes more visible when people are under pressure. The real conversation is not about eliminating cortisol, but about understanding the conditions that help the body regulate stress more effectively.

FAQ

What is cortisol?

Cortisol is a hormone that helps the body respond to stress and supports functions like energy regulation and the sleep-wake cycle.

Is cortisol always bad?

No. Cortisol is essential for normal body function. Problems tend to arise when stress and recovery are out of balance for too long.

Why is cortisol talked about so much online?

Because it has become a simple way to explain stress, burnout, fatigue, and other modern wellbeing concerns.

What helps support healthy cortisol patterns?

Sleep, movement, nutrition, daily routine, and recovery time are all important.

Continue the conversation

Curious about emerging approaches to health? Book a free discovery call to learn more about Astrid Clinic and the emerging therapies space.

Book a free discovery call

Written by: The Astrid Clinic Editorial Team

Clinically reviewed by: Nurse Liv

Published: July 2026