Author: raphapenque

A Certificate of Analysis — COA — is the single most useful document for judging supplement quality. Yet most shoppers have never seen one, let alone know how to read it. Here is a plain-English guide.

What a COA is

A COA is a laboratory report, ideally from an independent third-party lab, confirming what a specific production batch actually contains. It is batch-specific: a responsible brand issues a new COA for every batch, because every batch is a separate manufacturing run.

The key things to look for

• Batch or lot number — should match the number printed on your product. If it does not match, the COA is not for your product.
• Identity — confirmation that the substance is what it claims to be, often by a method such as HPLC or mass spectrometry.
• Purity / assay — the measured percentage of the active ingredient. For research-grade molecules, look for figures such as 99%+.
• Contaminant testing — screening for heavy metals, microbial contamination and, where relevant, solvents.
• The testing lab and date — an independent, named laboratory and a recent test date carry far more weight than an in-house, undated sheet.

Red flags

Be cautious if a brand cannot produce a COA at all, only offers one “on request” and then delays, provides a sheet with no batch number, or shows results from an unnamed lab. Transparency is the whole point.

How we do it

We publish a COA for every batch we sell in our COA Library — not on request, but openly. Match the batch number on your label to find yours.

This article is educational and reflects published research. It is not medical advice and does not describe the effects of any specific product. Food supplements are not a substitute for a varied, balanced diet and healthy lifestyle. Consult a healthcare professional before starting any supplement.

Magnesium is one of the most popular supplements in the world — and one of the most confusing to shop for, because it comes in many different chemical forms. This guide explains the differences so you can choose sensibly.

Why the form matters

Magnesium is always bound to another molecule, and that pairing affects two things: how well the magnesium is absorbed (bioavailability), and how it is tolerated in the digestive system. The elemental magnesium content — the actual amount of magnesium delivered — also varies between forms.

Common forms at a glance

• Magnesium bisglycinate (glycinate) — magnesium bound to the amino acid glycine. Well absorbed and generally gentle on the stomach, which is why it is a popular choice for daily and evening use.
• Magnesium citrate — bound to citric acid; reasonably absorbed but more likely to have a laxative effect at higher amounts.
• Magnesium oxide — high elemental magnesium content by weight but poorly absorbed; often used where a laxative effect is the goal.
• Magnesium L-threonate — a newer form that is the subject of specific research interest; typically the most expensive.

Authorised roles of magnesium

Under UK and EU regulations, magnesium is recognised as contributing to the reduction of tiredness and fatigue, to normal muscle function, to normal psychological function, and to the maintenance of normal bones, among other roles. These authorised statements apply to magnesium as a nutrient regardless of the form you choose.

Our pick

We chose the bisglycinate form for our magnesium precisely because it balances good absorption with gentle tolerance — the profile most people want for consistent daily use.

This article is educational and reflects published research. It is not medical advice and does not describe the effects of any specific product. Food supplements are not a substitute for a varied, balanced diet and healthy lifestyle. Consult a healthcare professional before starting any supplement.

Few molecules have attracted as much attention in longevity research as NAD+ (nicotinamide adenine dinucleotide) and its precursor NMN (nicotinamide mononucleotide). This guide summarises what the published science actually says — and, just as importantly, what it does not.

What NAD+ actually is

NAD+ is a coenzyme present in every living cell. It plays a central role in energy metabolism and in the activity of enzymes involved in cellular maintenance. Researchers have observed that tissue NAD+ levels tend to decline with age, which is why the molecule and its precursors have become such an active area of study.

Where NMN fits in

NMN is one of the direct biochemical precursors the body uses to produce NAD+. Because supplementing NAD+ directly is difficult, much research has focused on precursors such as NMN and NR (nicotinamide riboside). Studies in animal models have examined how oral NMN is absorbed and converted, and human trials have investigated safety and how blood markers respond.

What the research shows — and its limits

The preclinical literature is extensive and the early human safety data has been encouraging, but it is important to be precise: much of the most striking work is in cells and animals, and large long-term human outcome trials are still ongoing. Anyone reading longevity content should treat bold claims with healthy scepticism and look for the distinction between “observed in a mouse study” and “demonstrated in humans.”

Choosing a quality product

Where research-grade molecules like NMN are concerned, purity matters. Look for products that state their purity, are manufactured to GMP standards, and publish a batch-specific Certificate of Analysis. At Optigenix, every batch is third-party tested and its COA is published in our COA Library.

This article is educational and reflects published research. It is not medical advice and does not describe the effects of any specific product. Food supplements are not a substitute for a varied, balanced diet and healthy lifestyle. Consult a healthcare professional before starting any supplement.