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Digestion

The stomach, gut and everything that turns food into what the body uses.

Digestion is where food logging meets the body most directly. What and how much you eat, how much fibre it carries, how it is spread across the day and how much you drink all shape how the gut feels and works. Fibre and fluid are the two levers with the most evidence behind them for everyday gut comfort and regularity.

The glycemic load of a meal — how much its carbohydrate is likely to raise blood glucose — is a digestion-adjacent number you can actually compute from what you ate. It is about carbohydrate quality, not calories, and it is one of the more useful things to look at if you are paying attention to how meals affect you.

Fermented foods and the wider question of gut bacteria attract a lot of attention; the honest summary is that a varied, fibre-rich diet is the best-supported way to feed a healthy gut, and that most specific probiotic claims are more modest than they sound. What you can log — fibre, variety and regularity — is exactly what has the most evidence behind it.

Metrics that relate to digestion

• Meals and portions logged
• Fibre intake
• Hydration
• Meal timing across the day

Calculators and reference pages that apply

Each of these is a real page on this site, chosen because it relates to this system:

The everyday levers

• Fibre from vegetables, legumes, fruit and whole grains.
• Enough fluid across the day.
• Regular meal timing and not eating in a rush.

What tracking can and cannot tell you

A food log shows what went in, which is genuinely useful for digestion. It cannot see the gut itself — persistent pain, bleeding or a change in habit is a medical question.

Frequently asked questions

Other systems

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