Diets

Fasting, keto, carnivore, Mediterranean, Blue Zones and the influencer protocols, what actually adds healthy years, without the dogma.

Fasting Protocols

Treatment	Evidence	The honest take
Alternate-Day Fasting	Promising	Alternate-day fasting is an effective, reasonably well-supported way to lose weight and improve metabolic markers, but it's hard work and generally no bett
Extended / Water Fasting	Mixed / Early	Extended water fasting causes genuine, dramatic short-term metabolic changes, but its long-term human benefits are unproven and its risks are real and seri
Fasting-Mimicking Diet	Promising	The fasting-mimicking diet is one of the better-evidenced fasting approaches for nudging metabolic and aging-related markers, with lower risk than a true m
Intermittent Fasting	Promising	Intermittent fasting is a legitimately useful, no-cost way for many people to eat less and nudge their metabolic markers in a good direction. Just keep you
OMAD (One Meal A Day)	Mixed / Early	OMAD is a powerful way to cut calories, but it's extreme, hard to do well, and barely studied in humans, with some markers actually worsening in the limite
The 5:2 Diet	Promising	The 5:2 is a flexible, well-tolerated, reasonably evidence-backed way to cut weekly calories and support metabolic markers. It's not superior to plain diet
Time-Restricted Eating	Promising	Time-restricted eating is the most sensible, sustainable form of fasting for everyday life, with a credible (if still early) link to better metabolic marke

The Influencer Protocols

Treatment	Evidence	The honest take
Ancestral / Ketovore Diet	Mixed / Early	Dropping sugar and ultra-processed food helps almost anyone, and a short animal-forward elimination phase can be a reasonable experiment. But the long-term
Circadian Eating	Promising	Of the timing-based approaches, circadian eating has some of the most plausible science behind it, and "eat earlier, stop well before bed" is sensible, fre
Ray Peat / Pro-Metabolic Eating	Thin / Hype	If you have been chronically under-eating, the "eat enough to support your metabolism" message has a real point. But the signature pro-metabolic prescripti
The Blueprint Protocol (Bryan Johnson)	Thin / Hype	Borrow the boring parts (whole foods, exercise, sleep, not overeating) and you will get most of the real benefit. The expensive, dramatic, "reverse aging"
The Longevity Diet (Valter Longo)	Promising	The everyday diet is a sensible, well-evidenced way to eat. The fasting cycles are promising and worth a look for healthy people, but they are higher-effor
The Pegan Diet	Promising	Pegan is basically a sensible, plant-forward whole-food diet with a catchy name. Lean into the plants-and-quality core and feel free to ignore the less-sup

Targeted & Therapeutic

Treatment	Evidence	The honest take
Anti-Inflammatory Diet	Promising	"Anti-inflammatory eating" is really just the Mediterranean pattern in a trendier outfit, and that pattern has real support for supporting healthy aging. E
Autoimmune Protocol (AIP) / Elimination Diet	Mixed / Early	A guided elimination diet is a legitimate way to find your personal food triggers; AIP is its much stricter cousin with only early, thin evidence for its l
Caloric Restriction	Promising	Caloric restriction is the most scientifically serious longevity diet there is, with strong animal data and real human evidence for better aging markers, b
Glucose-Control Eating	Promising	The eating principles behind glucose control are genuinely good and worth adopting by anyone. Wearing a monitor can be an eye-opening short experiment, but
Gluten-Free (non-celiac)	Mixed / Early	If you do not have celiac disease, gluten-free is a legitimate personal experiment but not a proven health upgrade, and your symptoms may actually be about
Gut-Microbiome / Fiber-First Diet	Promising	Feeding your gut with varied fiber and a little fermented food is one of the safest, best-supported things you can do for everyday health. Just keep your e
Low-FODMAP Diet	Strong	For stubborn bloating and gut discomfort, low-FODMAP is one of the few popular eating plans with solid human evidence behind it. Treat it as a short diagno
Whole30	Mixed / Early	Whole30 works mainly because it strips out junk food and forces attention on what you eat, not because beans and grains are bad for you. Use it as a short

Whole-Diet Patterns

Treatment	Evidence	The honest take
Blue Zones Diet	Promising	Strip away the branding and you get a sensible, affordable, mostly plant-based pattern that overlaps with well-supported diets. Treat it as inspiration and
DASH Diet	Strong	DASH is one of the best-tested eating patterns for supporting healthy blood pressure, and that alone makes it valuable for long-term health. It is sensible
Flexitarian Diet	Promising	Flexitarian eating may be the most sustainable way for most people to get plant-based benefits without the strain of strict rules. It works only if plants
Mediterranean Diet	Strong	If you adopt one eating pattern for the long haul, this is the most defensible choice on the evidence. It is flexible, enjoyable, and backed by stronger hu
MIND Diet	Promising	MIND is a smart, brain-leaning version of two excellent diets, and following it costs you nothing in health terms. Just hold its specific memory promise lo
Nordic Diet	Promising	The Nordic diet is a credible, sustainable regional version of well-supported healthy eating, especially for those outside the Mediterranean. The evidence
Paleo Diet	Mixed / Early	Paleo's real value is forcing out processed junk, and that alone helps many people short term. But banning beans and whole grains works against the longest
Pescatarian Diet	Promising	Pescatarian eating is an easy, sustainable way to capture most plant-based benefits while keeping a satisfying protein source. Lean on smaller, lower-mercu
Whole-Food Plant-Based / Vegan	Promising	A carefully planned, whole-food plant-based diet has solid support for healthy aging markers and is among the better long-term patterns. The non-negotiable

Macro Strategies

Treatment	Evidence	The honest take
Carb Cycling	Mixed / Early	For competitive athletes who already have the basics dialed in, carb cycling is a reasonable fine-tuning tool. For most people it adds complexity without c
Carnivore Diet	Thin / Hype	Carnivore can work as a short, strict elimination experiment to identify foods that bother you, and some people genuinely feel better on it. But as a long-
High-Protein Diet	Strong	For preserving muscle, staying strong with age, and managing weight, eating more protein is one of the most reliable, evidence-backed moves you can make. P
Ketogenic Diet	Promising	Keto is a legitimately effective short-term tool for weight loss and blood sugar control, and that is well supported. But it is demanding to sustain, the l
Low-Carb / Low-Glycemic Diet	Strong	If you want a flexible, evidence-backed, livable way to improve blood sugar and manage weight, this is arguably the smartest pick in this chapter. It captu
Low-Fat Diet	Mixed / Early	Low-fat is not the clear winner it was once sold as, and the old "fat is bad" message has aged poorly. But a whole-food version built on plants and lean pr
Mediterranean-Keto Hybrid	Promising	This is arguably the most thoughtful version of keto, swapping its weakest feature (heavy saturated fat) for the best-supported fats in nutrition. The long
Seed-Oil Avoidance	Mixed / Early	The extreme "seed oils are toxic" framing isn't backed by human evidence, but the practical takeaway (cook with olive oil and whole-food fats, eat far less

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