Best Protein Powder Ingredients: Whey vs Casein vs Plant

Not all protein powders are equal. Here’s what to look for.

For all supplement guides, see: Best Greens Powder.

Protein Types Compared

Type	Absorption	Best For
Whey Isolate	Fast (30-60 min)	Post-workout, general
Whey Concentrate	Fast	Budget-friendly option
Casein	Slow (6-7 hours)	Before bed, satiety
Pea + Rice blend	Moderate	Vegan, dairy-free

Whey Protein: The Standard

Whey Isolate

• 90%+ protein
• Low lactose (usually tolerable for lactose intolerant)
• Fast absorbing
• More expensive

Whey Concentrate

• 70-80% protein
• Contains more lactose
• Cheaper
• Often tastes creamier

Verdict: Isolate for sensitive stomachs or cutting; concentrate for budget.

Casein: Slow-Release

• Digests slowly (6-7 hours)
• Best before bed or for satiety
• Similar amino acid profile to whey

Plant Protein

Best plant proteins combine sources for complete amino acid profile:

• Pea + Rice: Complete profile, most common
• Hemp: Complete but lower leucine
• Soy: Complete, some avoid for hormone concerns (debated)

What to Avoid

• Amino spiking: Cheap aminos added to inflate protein count
• Excessive fillers: Too many thickeners, gums
• Artificial sweeteners: If you’re sensitive
• Proprietary blends: Hide actual protein amounts

Quality Indicators

• Third-party tested (Informed Sport, NSF)
• Protein matches label claims
• Short ingredient list
• Reputable brand with testing history

Best Products by Category

Category	Top Pick
Best overall	Optimum Nutrition Gold Standard
Premium	Thorne Whey Protein
Budget	Myprotein Impact Whey
Vegan	Vega Sport or Garden of Life
Casein	Optimum Nutrition Casein

How Much Protein?

Goal	Daily Protein
General health	0.7-0.8g per lb bodyweight
Muscle building	0.8-1.0g per lb bodyweight
Cutting/dieting	1.0-1.2g per lb bodyweight

Verdict

For most people: Whey isolate or concentrate from reputable brand.

For vegans: Pea + rice blend.

For before bed: Casein.

For all supplement guides, see: Best Greens Powder.