The Original Oxford Uni Ketone Ester Drink
deltaG® Ketone Ester
The original Oxford ketone ester for clean energy, metabolic flexibility and razor-sharp clarity.
deltaG® Ketone Ester is the original and best-known ketone ester — developed through pioneering research at Oxford — designed to raise ketone levels rapidly and substantially.
Ketones offer an elegant alternative fuel source for the brain and body. Rather than relying on sugar, stimulants or another coffee, deltaG® supports a cleaner form of energy: steady, focused and metabolically sophisticated.
At Wellgevity®, this is where ketones become interesting — not as a diet trend, but as a tool for energy flexibility. The ability to shift between fuel sources is one of the hallmarks of a resilient metabolism, and deltaG® offers a direct way to explore that state.
Why Dr Tam likes it
Dr Tam loves deltaG® because it is both serious science and a beautiful ritual.
This is not another “energy drink”. It works through a different pathway — supporting the body with exogenous ketones that can be used by the brain, muscles and mitochondria as an efficient fuel source.
It may be particularly useful for deep work, long days, travel, fasting windows, endurance training, or moments when you want to feel switched on without feeling wired.
And, served cold, it has a kind of functional elegance: the ketone martini — a clean, non-alcoholic performance ritual for clarity, energy and presence. ( my go to!)
May support:
- Rapid elevation of ketone levels
- Mental clarity and focus
- Clean, sustained energy
- Metabolic flexibility
- Endurance and performance
- Appetite steadiness
- Mitochondrial energy pathways
- Recovery during high-demand periods
Dr Tam’s perspective
deltaG® is for those who are curious about energy beyond caffeine, sugar and willpower.
It is precise, potent and not for everyone every day — but when used well, it can be a powerful tool for focus, stamina and metabolic flexibility.
For me, it sits beautifully in the Wellgevity® toolkit because it supports a more intelligent relationship with energy: less spike and crash, more steady fuel; less force, more flexibility.
Sadly its expensive because of import duties and manufacturing detail.