Aged Garlic Extract in the UK: What the Label Doesn't Tell You
Most people comparing garlic supplements in the UK start with price. That turns out to be the least useful place to start.
After going through a lot of products and a fair amount of the actual clinical research, the most important variable is almost never the price. It is the ageing process — and most labels tell you almost nothing about it.
Why standard garlic supplements often disappoint
The active compound in raw garlic is allicin. You have probably seen it on labels — "standardised for allicin" or "allicin equivalent". The problem is that allicin is chemically unstable. It begins breaking down almost immediately after the garlic is processed. By the time it reaches your digestive system, a significant portion has already degraded.
This is why people who have tried standard garlic capsules from the supermarket or a high street health store often report noticing very little. It is not necessarily that garlic does not work — it is that most products are not delivering what the research actually studied.
What properly aged garlic extract is
Aged garlic extract goes through a controlled ageing process — typically 20 months or longer. During this time, the unstable allicin-related compounds break down and more stable, water-soluble compounds form. The most significant of these is S-allylcysteine, or SAC.
SAC is the compound most consistently referenced in peer-reviewed cardiovascular research on aged garlic extract. It is water-soluble, more bioavailable than allicin, and stable enough to survive digestion. It is not present in meaningful amounts in raw garlic, garlic powder, or standard garlic oil.
This distinction — aged extract versus standard garlic — is the single most important factor when comparing supplements. If a product does not clearly state it is aged garlic extract and provide some information about the process, it is worth asking what you are actually buying.
What to look for on the label
Based on going through a lot of products and the research behind them, these are the factors worth checking:
Is it clearly labelled as aged garlic extract — not garlic powder, garlic oil, or a vague "garlic complex"?
Does it state a clear daily serving amount? Underdosing is extremely common in the UK supplement market, particularly when brands hide amounts behind proprietary blends.
Is it odourless or low odour? Proper long-term ageing substantially reduces the sulfur compounds responsible for garlic smell. If a product claims to be aged but still smells strongly, that is worth questioning.
Is the format easy to use consistently? Softgels and capsules are typically easier to take daily than tablets or liquids, which matters for a supplement intended for consistent long-term use.
Does the brand make medical claims? Any brand claiming their supplement treats or lowers blood pressure is making a claim that food supplements cannot legally make in the UK. It is also a quality signal — brands that overstate what their product does tend to understate what it does not.
Where to go from here
If you want a detailed breakdown of what separates quality aged garlic extract products in the UK market, this guide covers the key evaluation criteria clearly: best aged garlic extract UK.
If you are currently taking blood pressure medication and wondering whether aged garlic extract is appropriate to take alongside it, this article covers what the research shows and what to discuss with your doctor: aged garlic extract with blood pressure medication.
The supplement market rewards people who do the research. Most products look similar on the outside. The difference is usually in what the label does not say.