What is Total Activity (TA) in Honey? The Complete Guide

If you have ever seen a honey labelled with a number like "TA 23+" or "Total Activity 15+", you may have wondered what it actually means. This guide explains everything — what Total Activity is, how it is measured, why it matters, and what the numbers mean when choosing a genuine premium raw honey.

Total Activity (TA) is the single most reliable laboratory measurement of a honey's bioactive potency. It tells you, in concrete verified numbers, how biologically active a honey actually is — not how it looks, not where it claims to come from, but what independent science says about what is inside the jar.

What Does Total Activity Mean?

Total Activity measures the antibacterial and bioactive potency of honey relative to a phenol standard. The result is expressed as a percentage — so a honey with a TA of 23.5+ has been verified by a laboratory to have bioactive potency equivalent to a 23.5% phenol solution.

The higher the number, the greater the verified bioactive activity.

This measurement was developed as a standardised way to compare honeys from different origins and floral sources on a level playing field. It is the same scale used to measure Manuka honey's famous UMF (Unique Manuka Factor) ratings — making direct comparisons between Greek forest honey and New Zealand Manuka possible for the first time.

How is Total Activity Measured?

Total Activity is measured through a process called phenol equivalence testing, conducted in a certified third-party laboratory.

The process works as follows. A honey sample is placed in contact with a bacterial culture under controlled conditions. The degree to which the honey inhibits bacterial growth is then compared against a series of phenol solutions of known concentrations. The phenol concentration that produces an equivalent level of inhibition becomes the honey's Total Activity rating.

This is not a test that can be performed at home or estimated visually. It requires professional laboratory equipment, standardised bacterial cultures, and certified analysis methodology. Any honey claiming a TA rating without a verifiable laboratory certificate is making an unverifiable claim.

Troy Honey's Greek Fir and Oak honeys are independently tested on every single batch at a certified laboratory in the United Kingdom. The certificates are publicly available on our Lab Verification page.

What is a Good Total Activity Score?

Understanding TA ratings requires context. Here is a practical reference guide:

TA 0–5 — Most commercially processed supermarket honeys fall in this range. Standard heating and filtration processes destroy much of the natural bioactive activity. These honeys are primarily sweeteners with minimal bioactive properties.

TA 5–10 — Entry-level raw honeys with some preserved bioactive activity. Better than processed honey but not exceptional.

TA 10–15 — Good quality raw honeys. This range includes many well-regarded single-origin honeys from clean environments.

TA 15–20 — High quality raw honey with strong bioactive activity. Most premium Manuka honeys sold at standard retail prices fall in this range.

TA 20+ — Exceptional bioactive potency. Very few honeys in the world are independently verified at this level. Troy Honey's Greek Fir Honey is verified at 23.5+ and Greek Oak Honey at 21.5+ — placing both firmly in this exceptional category.

How Does Total Activity Compare to Manuka UMF?

Manuka honey from New Zealand is marketed using the UMF (Unique Manuka Factor) scale, which measures a compound called methylglyoxal (MGO) alongside two other markers specific to Manuka honey.

The Total Activity scale measures overall bioactive potency using phenol equivalence — a broader measure that captures the full spectrum of antibacterial activity rather than one specific compound.

This means TA and UMF are measuring related but not identical things. However the phenol equivalence methodology used for TA ratings is widely accepted in scientific literature and produces directly comparable results across different honey varieties.

A Greek Fir Honey with a TA of 23.5+ has been independently verified to have bioactive potency at least equivalent to a Manuka honey with a UMF rating in the same numerical range — at a significantly lower price point and with additional certifications including EU Organic, ISO 22000, and Kosher.

Why Does Total Activity Matter for Forest Honey Specifically?

Forest honeys — including fir honey and oak honey — are honeydew honeys produced when bees forage the secretions of insects feeding on trees rather than collecting flower nectar. This production method results in fundamentally different chemical profiles compared to blossom honeys.

Forest honeys are naturally richer in minerals, oligosaccharides, and phenolic compounds — all of which contribute to higher bioactive activity. The pristine mountain ecosystems where Troy Honey's fir and oak honeys are harvested — the UNESCO-protected Agrafa Mountains of central Greece — amplify this effect further. At elevations above 1,000 metres, free from industrial agriculture and pollution, the biological diversity of the forest ecosystem directly translates into higher bioactive complexity in the honey.

This is why genuine Greek mountain forest honey consistently achieves higher TA ratings than most blossom honeys. The ecosystem itself is the quality driver — and Total Activity is the measurement that proves it.

How Do You Verify a Honey's Total Activity Claim?

Not all TA claims are equal. Here is what to look for when evaluating any honey that carries a Total Activity rating:

Independent laboratory certification — The TA rating must come from a third-party certified laboratory, not the producer's own testing. Ask for the certificate. If the producer cannot provide one for the specific batch you are purchasing, the claim is unverified.

Batch-specific testing — TA can vary between harvests. A certificate from two years ago does not guarantee the current batch meets the same standard. Troy Honey tests every batch independently.

Named laboratory — A genuine certificate will name the laboratory, its accreditation, the testing methodology used, and the specific honey sample tested. Vague references to "laboratory testing" without these specifics are a warning sign.

Consistent traceability — You should be able to connect the certificate to the specific jar you purchased via batch number or harvest date.

Troy Honey publishes its full laboratory certificates on the Lab Verification page. Every jar sold is covered by an independent test from a UK-certified laboratory using phenol equivalence methodology.

Frequently Asked Questions About Total Activity

What does TA 23.5+ mean on Troy Honey? It means Troy Honey's Greek Fir Honey has been independently verified by a certified UK laboratory to have bioactive potency equivalent to a 23.5% phenol solution — placing it among the highest independently verified raw honeys available anywhere in the world.

Is Total Activity the same as UMF? They are related but not identical. Both measure bioactive potency but use different methodologies. UMF measures three specific Manuka-unique compounds. TA measures overall phenol-equivalent bioactive activity across all compounds. Both produce comparable numerical results for practical purposes.

Can any honey have a high Total Activity rating? Any genuinely raw, unprocessed honey from a clean environment can achieve meaningful TA ratings. However consistently high TA ratings — above 20 — are rare and almost exclusively found in honeydew forest honeys from pristine mountain ecosystems. Blossom honeys rarely exceed TA 15 under independent testing.

Does heating honey destroy Total Activity? Yes. Heat is the primary destroyer of bioactive activity in honey. This is why Troy Honey is harvested and bottled without any heating or filtration. The moment honey is heated above approximately 40°C, enzymatic activity begins to degrade and TA ratings fall. This is also why processed supermarket honey has negligible TA ratings regardless of origin claims on the label.

Where can I see Troy Honey's lab certificates? All laboratory certificates for Troy Honey's Greek Fir and Oak honeys are publicly available on our Lab Verification page.