Are protein powders contaminated with lead and heavy metals?

What did the 2025 testing find?

In October 2025 Consumer Reports in the United States tested 23 protein powders and ready-to-drink shakes. As reported by NPR and OPB:

• More than two-thirds had more lead in one serving than the organisation's daily level of concern of 0.5 µg, a figure derived from California's Proposition 65.
• Plant-based products averaged about nine times the lead of dairy-based products and roughly twice that of beef-based products.
• Whey and other dairy products generally had the lowest levels.
• The highest result was a mass gainer at 7.7 µg per serving.

Industry groups replied that the threshold is self-imposed and far below government limits. For context, the US FDA's interim reference levels for lead are 2.2 µg a day for children and 8.8 µg a day for women of childbearing age. The honest reading: some products exceed a very cautious benchmark, and a few are high enough to deserve attention, particularly if used daily.

Why do plant proteins carry more lead?

Plants take up metals from soil and water, and protein isolates concentrate whatever is in the crop. Dairy protein is filtered from milk, which usually carries far lower metal loads. Our evidence library notes that plant powders are not unsafe by definition, but daily heavy use of high-lead products is something to avoid, especially in pregnancy and for children.

What does this mean in South Africa?

• We could not find published, specific heavy-metal limits for sports supplements in South Africa; general foodstuff contaminant rules apply (are supplements regulated).
• We found no published South African heavy-metal test data on named protein or collagen brands; the Consumer Reports results above are for US products. Few local listings state any heavy-metal testing; among the collagen products we reviewed, only New Leaf's marine collagen claims it, without naming a scheme.
• Local plant proteins range widely in price (October 2026): Faithful to Nature Pea Protein Isolate 650 g is R148–R185 (15 g protein per serving), while USN BlueLab Plant Based Protein 900 g is R399–R474.99 (20 g per serving).

How can you lower your exposure?

1. Use whey or another dairy protein as your main powder if you tolerate dairy; it tested lowest (isolate vs concentrate).
2. Rotate sources: do not use the same plant powder for several shakes a day, every day.
3. Ask the brand for a certificate of analysis for lead, cadmium, arsenic and mercury by batch. A brand that tests will usually share it.
4. Avoid very large servings (mass gainers are 100 g or more of powder) as a daily habit (healthy weight gain).
5. Be extra cautious for pregnant women, young children and teenagers, and talk to a dietitian.

Should you stop using protein powder?

No. Protein from food remains the base, and a dairy-based powder is a reasonable tool. Quality problems are a supplier issue rather than a flaw of whey itself. If you are vegan, choose plant products that publish batch heavy-metal tests, and consider the other consumer-protection issue: some South African products overstate protein content (amino spiking). See our best plant protein comparison and best whey isolate.

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