Plant Protein & Nutrition Glossary: 35+ Terms Explained (India)

By the KABO Nutrition Team · medically reviewed by Dr. Nikhil Panchal, MD · fact-checked against cited sources — see our editorial & nutrition standards.

A nutrition glossary is a plain-English dictionary of the terms you meet on labels and in health articles — from "complete protein" and "PDCAAS" to "prebiotic" and "adaptogen". This guide defines 35+ plant-protein and whole-body-nutrition terms in one or two clear sentences each, with Indian context and references to ICMR-NIN, FAO/WHO and other trusted sources.

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How to use this glossary

Nutrition labels and health articles are full of shorthand. Knowing what each term actually means turns a confusing label into useful information. This glossary is organised in two ways. First, a grouped set of definition lists under plain-English headings — protein basics, protein quality, gut health, and general nutrition — so related ideas sit together. Second, an alphabetical quick-reference table near the end for fast lookup. Every definition is short enough to stand on its own. Where a term comes from a specific scientific framework, the source is named so you can verify it. This is general nutrition information, not medical advice; for personal guidance, consult a doctor or registered dietitian.

Protein basics

Protein

A macronutrient made of amino acids, used by the body to build and repair muscle, skin, hair, enzymes, hormones and immune cells. Found in pulses, soy, dairy, eggs, meat, nuts, seeds and grains.

Amino acids

The building blocks of protein. There are 20 used by the human body; chains of them fold into the proteins your body needs.

Essential amino acids (EAAs)

The amino acids your body cannot make and must get from food. Adults need nine: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine.

BCAAs (branched-chain amino acids)

Three essential amino acids — leucine, isoleucine and valine — grouped together because of their branched chemical structure. They are involved in muscle protein synthesis.

Leucine

The BCAA most strongly linked to triggering muscle protein synthesis. Plant proteins generally contain enough leucine when intake is adequate and varied.

Lysine

An essential amino acid that tends to be low in cereals like rice and wheat, making it the "limiting" amino acid in many Indian cereal-based diets. Pulses are rich in it.

Methionine

A sulphur-containing essential amino acid that tends to be lower in pulses and higher in cereals and rice protein — the mirror image of lysine.

Macronutrient

A nutrient needed in large amounts that supplies energy: protein, carbohydrate and fat.

Plant protein

Protein sourced from plants — pulses, soy, peas, rice, nuts, seeds and grains — rather than from animals. Our complete guide to plant protein in India covers this in depth.

Protein quality terms

Complete protein

A protein source that provides all nine essential amino acids in adequate amounts. Most animal proteins and soy are complete; many single plant foods are not. See complete protein and amino acids.

Limiting amino acid

The essential amino acid present in the smallest amount relative to need in a given food. It "caps" how much usable protein you get from that source — typically lysine in cereals and methionine in pulses.

Complementary proteins

Two protein sources that each lack a different amino acid but together supply the full set — the classic example being dal–chawal (lentils + rice). Eaten across the day, they form a complete profile.

Protein quality

A measure of how well a protein meets human amino acid needs and how well it is digested — not just how many grams it contains.

PDCAAS

Protein Digestibility-Corrected Amino Acid Score — the FAO/WHO method for rating protein quality on a 0 to 1.0 scale, combining amino acid profile with digestibility. High-quality proteins like egg, milk and soy sit near 1.0.

DIAAS

Digestible Indispensable Amino Acid Score — a newer, more precise quality measure proposed by FAO that measures amino acid digestibility at the end of the small intestine. It is gradually replacing PDCAAS in research.

Bioavailability

How much of a nutrient your body can actually absorb and use after eating it. Cooking, soaking and sprouting can raise the bioavailability of plant nutrients.

Nitrogen balance

A research method comparing nitrogen eaten (as protein) with nitrogen lost. "Positive" balance suggests the body is building tissue; "negative" suggests it is breaking down more than it builds.

Specific plant proteins

Pea protein

Protein isolated from yellow split peas. Rich in lysine and BCAAs, lower in methionine, and free from the common soy and dairy allergens. See pea protein benefits.

Brown rice protein

Protein from brown rice. Relatively higher in methionine and lower in lysine — which is why it pairs so well with pea protein to form a complete blend.

Soy protein

A plant protein from soybeans that is naturally complete (all nine essential amino acids). A common allergen, so some people prefer soy-free blends.

Whey

A fast-digesting protein derived from milk during cheese-making. It is complete and high-quality, but it is dairy-based, so it is not suitable for vegans or many lactose-intolerant people.

Gut-health terms

Dietary fibre

The parts of plant foods your body cannot fully digest. Fibre aids digestion, satiety and steady blood sugar, and feeds beneficial gut bacteria.

Soluble fibre

Fibre that dissolves in water to form a gel — found in oats, psyllium (isabgol), legumes and fruit. It helps slow digestion and can support healthy cholesterol and blood sugar.

Insoluble fibre

Fibre that does not dissolve in water — found in whole grains, wheat bran and vegetables. It adds bulk to stool and supports regularity.

Prebiotic

A type of fibre or compound that feeds the beneficial bacteria already living in your gut. Found in foods like onion, garlic, banana, oats and pulses.

Probiotic

Live beneficial microorganisms that, in adequate amounts, may support gut health. Found in fermented foods like curd (dahi), idli batter and kanji. See our gut health and probiotics guide.

Synbiotic

A combination of prebiotics and probiotics together, designed so the prebiotic helps the probiotic bacteria survive and grow.

CFU (colony-forming units)

The unit used to count viable probiotic bacteria — for example, "8 billion CFU" indicates how many live organisms a serving provides.

Gut microbiome

The community of trillions of bacteria and other microbes living in your digestive tract, increasingly linked to digestion, immunity and overall health.

Digestive enzymes

Proteins that break down food into absorbable pieces — for example, proteases for protein, amylases for starch and lipases for fat.

General nutrition terms

Micronutrient

A nutrient needed in small amounts — vitamins and minerals such as iron, zinc, calcium, vitamin B12 and vitamin D. Essential for countless body processes.

RDA (Recommended Dietary Allowance)

The daily intake of a nutrient that meets the needs of almost all healthy people in a group. In India, RDAs are set by ICMR-NIN — the adult protein RDA is roughly 0.83 g per kg body weight per day.

EAR (Estimated Average Requirement)

The intake estimated to meet the needs of half the people in a group. It is the statistical basis from which the higher RDA is derived.

Antioxidant

A compound that helps neutralise unstable molecules called free radicals. Found widely in fruits, vegetables, spices and superfoods.

Adaptogen

A traditional category of herbs — such as ashwagandha and tulsi — claimed to help the body cope with stress. Evidence is emerging; see what are superfoods for context.

Superfood

A marketing term (not a scientific category) for nutrient-dense foods like berries, seeds, greens and certain herbs. Useful as a label, but no single food is essential.

Meal replacement

A food or shake designed to stand in for a full meal, providing protein, carbohydrate, fat, fibre and a range of vitamins and minerals — not just a single nutrient.

Glycaemic index (GI)

A 0–100 ranking of how quickly a carbohydrate raises blood sugar. Lower-GI foods (most pulses, whole grains) raise it more gradually.

Net carbs

An informal calculation of total carbohydrate minus fibre (and sometimes sugar alcohols), used to estimate the carbohydrate that meaningfully affects blood sugar. Not an official regulatory term in India.

Anti-nutrient

A natural plant compound — such as phytic acid, tannins or lectins — that can reduce the absorption of certain minerals. Soaking, sprouting, fermenting and cooking lower their effect.

Phytic acid (phytate)

An anti-nutrient in pulses, grains, nuts and seeds that can bind minerals like iron and zinc. Soaking, sprouting and fermenting (as in idli/dosa batter) reduce it.

Whole-body nutrition

Nourishment that goes beyond protein alone — protein plus fibre, vitamins, minerals, antioxidants and gut support, together. See our India nutrition reference.

Alphabetical quick-reference table

Use this table to look up a term fast. The grouped sections above give fuller context where it helps.

These are general reference definitions; individual needs vary. Consult a doctor or registered dietitian for personal advice, especially during pregnancy, illness or chronic conditions.

Where these terms come from

The protein-quality methods in this glossary — PDCAAS and DIAAS — are defined by the Food and Agriculture Organization and World Health Organization. You can read FAO's methodology in its report on protein quality evaluation. India's RDA and EAR figures, plus fibre and micronutrient guidance, are published by ICMR-NIN in its RDA tables and Dietary Guidelines for Indians. For background on complete protein and amino acids, the U.S. NIH/NCBI and Healthline offer clear, general explanations. To go deeper on essential amino acids specifically, read what are essential amino acids.

How KABO uses these terms

If you put the glossary together, you can read a label like a nutritionist. KABO's Butter Coffee is built on a complete protein made by complementing pea protein (lysine-rich) with brown rice protein (methionine-rich), delivering 23–25 g per serving. Beyond protein, it bundles 60+ superfoods, 26 vitamins & minerals (micronutrients), 4 g dietary fibre, and pre + probiotics (8 billion CFU) plus digestive enzymes — a synbiotic, whole-body approach rather than protein in isolation. It has no artificial sweeteners, is FSSAI-compliant and third-party tested. The point of this glossary isn't to sell jargon; it's to help you judge any product — KABO included — on what the words actually mean.

Now that the labels make sense, see them in action: KABO Butter Coffee brings complete plant protein, superfoods, vitamins, minerals, fibre and pre + probiotics together in one daily whole-body nutrition shake.