
Netflix documentary revives interest in longevity
Since the release of the new Netflix documentary devoted to Bryan Johnson, the visionary entrepreneur obsessed with longevity, one question has been on everyone’s lips: what’s in his famous “Green Giant”, the green smoothie he religiously consumes every morning? The answer can be summed up in one word: chlorella.
In this captivating film, we discover the incredible life discipline of this billionaire who devotes his fortune and his days to slowing down the aging process. Among the most striking rituals is this now iconic beverage, one of whose main ingredients is chlorella, for its richness in a component still little known to the general public: spermidine.
Spermidine: the new green gold of longevity
A natural compound with promising effects
Spermidine is a polyamine naturally present in certain plant cells, notably in chlorella, but also in wheat germ and fermented soya. In recent years, this compound has attracted growing interest in scientific circles for its potential role inautophagy – the “cellular cleansing” process associated with slowing down the aging process. See our article on fasting: Benefits of Fasting, My Personal Experience
“Spermidine mimics some of the effects of intermittent fasting, by stimulating autophagy, which could help improve cellular health and extend lifespan” (1).
Among foods naturally rich in spermidine, chlorella occupies a prime position. This freshwater microalgae, already known for its richness in chlorophyll, plant proteins, iron and vitamin B12, also contains interesting levels of spermidine, particularly when grown and dried in optimal conditions.
Bryan Johnson’s morning ritual: a green smoothie with chlorella
A concentrate of anti-aging nutrients

Every morning, Bryan Johnson starts his day with a nutrient-dense green smoothie, which he has dubbed “Green Giant”. In the documentary, he reveals its composition: green fruit, ginger, broccoli and, above all, powdered chlorella. The aim? Maximize his intake of spermidine, as well as antioxidants, fiber, chlorophyll and micro-nutrients essential to cellular health.
This ritual, combined with an extremely rigorous lifestyle (optimized sleep, measured physical activity, constant biological analyses), aims to slow down the aging of your organs and return you to a younger biological age.
Why incorporate chlorella into your wellness routine?
While not everyone can follow Bryan Johnson’s extreme program, adding chlorella to your daily diet can be a simple but powerful move for your health:
- It’s naturally rich in spermidine, a compound recognized for its anti-aging effects (2)
- It supports elimination functions thanks to its high chlorophyll content
- Highly nutritious: proteins, iron, B12, lutein…
- Helps boost the immune system and protect against free radicals
How do you eat chlorella like Bryan Johnson?
As a powder in a smoothie
Add 1 to 3 grams of chlorella powder to your morning smoothie, ideally mixed with other green vegetables, a green apple, a lemon and a piece of fresh ginger.
Tablets for added convenience
For those looking for a quick solution, chlorella is also available in pure, cold-pressed tablets, to be taken with a large glass of water or juice.
A simple gesture inspired by a billionaire
While it’s unlikely that we’ll all be able to live like Bryan Johnson, there’s nothing to stop us taking inspiration from his best habits, such as making chlorella part of our daily diet. This little gesture could well become your great secret to longevity, starting tomorrow morning, in your very own “Green Giant”.
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