Does Blueprint Longevity Mix Break a Fast?

It is the question almost every buyer asks about this product. Longevity Mix is a morning longevity drink, and a lot of its buyers fast in the morning.

So, does one scoop break a fast? The honest answer starts with a fact most product pages skip. Bryan Johnson does not take it during a fast, and Blueprint does not tell you to either.

The short version

• Strict fast, zero calories: yes, it breaks it. One scoop prints 10 calories and 3 g of carbohydrate, and it contains amino acids.
• Practical time restricted eating: 10 calories is negligible for most fasting goals. Most fasters would not count it as breaking the fast in any meaningful way.
• Johnson takes Longevity Mix at 5:25 am, before his morning workout. Breakfast follows at 5:35 am. He takes it as his fast ends, not through it.
• Blueprint’s own directions say to take it with food.
• New to Blueprint? A Blueprint referral link takes $50 off your first order. No code is needed.

The Biggest Trap: Nobody Official Takes It During a Fast

Buyers assume a longevity drink mix is built to fit inside a fast. The evidence points the other way.

Johnson’s published routine puts Longevity Mix at 5:25 am. His eating window runs roughly 5:30 to 11:00 am, and breakfast lands at 5:35 am. The drink sits at the start of the window, minutes before food.

The label agrees with the routine. Blueprint’s directions say to mix one scoop with water and consume it in the morning with food. The brand FAQ repeats it: ideally with a meal or snack.

So the product is designed to be taken as a fast ends. If you take it mid fast, you are using it in a way neither the founder nor the brand describes.

It Depends on Your Definition of a Fast

There are two working definitions, and they give two different answers.

A strict fast means zero intake beyond water. By that rule, anything with calories ends the fast. Longevity Mix has calories. It ends the fast.

A practical fast, the kind most time restricted eaters follow, aims at a long daily stretch with insulin kept low. Many fasters use a rule of thumb that under about 50 calories does not meaningfully break it. That figure is a convention among fasters, not a medical standard. By that rule, a 10 calorie scoop passes.

The research literature defines fasting by sustained periods without food, not by single drinks. The New England Journal of Medicine review of intermittent fasting describes fasting windows measured in hours and built around metabolic switching over time. One 10 calorie drink is a rounding error against a full day of eating and fasting.

One honest limit: nobody has tested Longevity Mix against fasting outcomes, including autophagy. Anyone who promises it preserves or destroys autophagy is guessing. No finished product trial exists.

What Is in One Scoop, Ruled for a Fast

The current panel prints 10 calories per level scoop (14.8 g), with 3 g of total carbohydrate. The panel carries no sugars line and no protein line.

Three things in the scoop matter for a fasting decision:

• Calories and carbs. Ten calories and 3 g of carbohydrate. Small, and not zero.
• Amino acids. The mix contains glycine (1,200 mg) and taurine (1,500 mg), among its 12 actives. Amino acids are the part strict fasters object to most, because they are protein building blocks. The amounts here are small.
• Sweeteners. Allulose and monk fruit. Allulose is a low calorie sugar. Monk fruit is zero calorie. The panel lists allulose without printing an amount.

The full dose table for all 12 actives is in our Blueprint Longevity Mix ingredients breakdown.

Price, for context: $49 for 30 servings as of November 2026, or about $1.63 per scoop. Check the Blueprint product page for current pricing.

The Rest of the Blueprint Line, Ruled for Fasting

The same two definitions, applied across the line. Calories are per serving, from each product’s panel.

Creatine is the one product most fasters take without worry. Its label is creatine monohydrate and nothing else. No sugar, no sweetener, no printed calories. The strictest zero intake rules still count it as intake, but almost nobody fasts that way in practice.

How to Fit It If You Fast

The simple fix is timing, and it is the one Johnson uses. Move the scoop to the start of your eating window.

Take it with your first meal, or minutes before it. That matches the brand directions, matches the founder’s routine, and removes the question entirely.

If you train early and want it before a workout, be clear about the trade. You are ending your fast a little early on training days. For most practical fasters, that trade is worth it. For a strict fast, it is still a break.

If you fast for medical reasons, or you take medication or manage blood sugar, ask your clinician before combining fasting with supplements. That applies across this whole category.

Frequently Asked Questions

Does Longevity Mix break a water fast?

Yes. A water fast is zero calorie by definition. A scoop prints 10 calories and 3 g of carbohydrate, so it ends a water fast.

Why does Bryan Johnson take it at 5:25 am?

Because his fast is ending then. His eating window runs roughly 5:30 to 11:00 am, and breakfast follows the drink at 5:35 am. He times Longevity Mix with food, at the start of the window, not in the middle of a fast.

Does allulose break a fast?

Allulose is a low calorie sweetener, and the panel does not print how much is in a scoop. In strict terms, its calories count like any other. In practical terms, the energy is minimal, and most fasters treat allulose sweetened drinks as acceptable. No study has tested this product against fasting markers.

Can I take Blueprint Creatine while fasting?

Most fasters do. The creatine label lists creatine monohydrate only, with no sugar, no sweetener, and no printed calories. If your rule is zero intake of anything, it counts as a break. Almost every practical fasting rule allows it.

If 10 calories breaks a strict fast, is a practical fast ruined by it?

No. A practical fast is judged across the whole day and the whole window, not by one 10 calorie drink. The strict definition exists for people who want a bright line. If that is your rule, the timing fix above solves it.

The Bottom Line

By the strict definition, yes, Longevity Mix breaks a fast: 10 calories, 3 g of carbs, and amino acids. By the practical definition most fasters live by, it is negligible. And by the founder’s own routine, the question never comes up, because he takes it as his fast ends, with food.

Take it at the start of your eating window and the question disappears.

If you decide to try it, the Blueprint referral link takes $50 off your first order.

Related reading:

• Blueprint Longevity Mix Ingredients: Every Dose on the Label
• Blueprint Matcha Ingredients: Every Dose on the Label
• Blueprint Referral Link: Discount Code to Get $50 Off Your First Order