Pea

botanical2-phenylethanol

What is it

Pea (Pisum sativum) is a widely consumed legume eaten as a fresh vegetable, dried pulse, or processed into food ingredients. In dietary supplements, 'pea' most often refers to pea protein isolate, derived from yellow split peas as a popular plant-based protein source. Whole and split peas also provide carbohydrates, fiber, vitamins, and minerals.

How it works

Pea protein contains all nine essential amino acids, although it is relatively lower in methionine and higher in lysine compared with animal proteins. It is well absorbed (digestibility ~93% for pea protein isolate) and rich in branched-chain amino acids (BCAAs), supporting muscle protein synthesis similarly to other quality protein sources when consumed in adequate amounts. Whole peas also provide soluble and insoluble fiber that support digestive health, glucose control, and satiety. They are a good source of folate, vitamin K, manganese, iron, and various polyphenols. Pea-based supplements may include extracts targeting specific outcomes (e.g., AnaGain for hair, marketed for trichodynia or hair density support).

Evidence for 5 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Plant-based protein source

Grade A

Strong evidence

Pea is one of the best vegan/vegetarian protein sources, with complete amino acid profile and high digestibility comparable to dairy and animal proteins.

Muscle protein synthesis / resistance training

Grade B

Good evidence

Pea protein has been shown in randomized trials to support muscle growth and strength gains similarly to whey protein when consumed at adequate doses with resistance training. This is among the most studied uses of plant-based proteins.

Satiety / weight management

Grade C

Moderate evidence

Both whole peas and pea protein contribute to satiety and may support weight management as part of a high-protein, high-fiber diet pattern. Effects are similar to other quality protein and fiber sources.

Glycemic control

Grade C

Moderate evidence

Whole peas have a low glycemic index and may help blunt postprandial glucose responses, particularly when consumed with carbohydrate-containing meals.

Hair density (specific pea sprout extract)

Grade C

Moderate evidence

A specific pea sprout extract (AnaGain) has shown effects on hair density and reduced shedding in small randomized trials. This is a specialized extract, not standard pea protein.

5 commercial forms

Pea protein isolate (80-90% protein)

Highly digestible (~93%)

The most common supplement form. Mixes easily into smoothies and baking.

Pea protein concentrate

Lower protein content, more fiber and carbs

Less refined; provides protein with some fiber and other nutrients.

Pea sprout extract (AnaGain)

Standardized active compounds

Specialty extract used in hair-targeted products.

Whole or split peas (food)

Includes fiber, vitamins, minerals

Used in cooking; provides protein along with fiber and micronutrients.

Pea fiber

Concentrated fiber from peas

Used in supplements and food products for fiber fortification.

Dosage

There is no formal RDA for pea or pea protein specifically. For protein supplementation, doses of 20-40 g per serving are typical, with daily totals depending on individual protein needs (often 0.8-2 g per kg body weight). Specialty pea extracts have their own dosing based on the specific product.

When and how to take it

For protein needs, distribute pea protein across meals and snacks (20-40 g per dose). Post-exercise dosing is well studied for muscle recovery. Whole peas as a food can be consumed at any meal. Take with water to support digestion.

Food sources

Food	Amount	%DV
Cooked green peas	~9 g protein, ~9 g fiber per cup	—
Cooked split peas	~16 g protein, ~16 g fiber per cup	—
Pea protein powder	~20-25 g protein per scoop (~30 g)	—
Snap peas	~5 g protein per cup	—
Snow peas	~5 g protein per cup	—

Safety

Generally well tolerated. Possible side effects include gas, bloating, and mild gastrointestinal upset, especially in people with FODMAP sensitivity or new to high-fiber foods. Pea allergies are uncommon but possible, especially in people with other legume allergies. Pea protein has a notable flavor that some find off-putting.

Who should be cautious

People with pea, lentil, or other legume allergies should avoid. People with severe kidney disease may need to limit protein intake from any source. People on warfarin should keep vitamin K intake consistent (whole peas provide vitamin K; isolated protein does not). FODMAP-sensitive individuals may need to limit whole peas.

Interactions

Pea protein has no well-documented drug interactions. The high lysine content theoretically could affect arginine balance for those concerned about herpes virus management (high lysine, low arginine helpful). Whole peas' folate and vitamin K content may interact with methotrexate or warfarin if consumption changes significantly.

Frequently asked questions

Is pea protein as good as whey protein?⌄

Studies show pea protein supports muscle building and strength comparably to whey when consumed at adequate doses. Whey has slightly higher leucine per gram, but the practical difference for most users is small.

Will pea protein cause bloating?⌄

Some people experience gas or bloating, especially when starting. This often improves with continued use. Pea protein isolate has less of these effects than whole peas due to lower fiber and oligosaccharide content.

Is pea protein complete?⌄

Yes, it contains all nine essential amino acids, though it is lower in methionine. Combining with grains or other proteins ensures full amino acid coverage.

How much pea protein do I need?⌄

Per serving, 20-40 g supports muscle protein synthesis. Daily needs depend on body weight and activity (typically 0.8-2 g/kg).

Does pea protein contain estrogen-like compounds?⌄

Pea protein contains very little of the isoflavones found in soy. It is generally not considered phytoestrogenic.

References

Pea (Wikidata) — Wikidata link
Pea protein component (ChEBI 49000) — ChEBI link

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Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition.