How you prepare your shake matters more than you think

Hi there,

Ever forgotten to clean your protein shaker out after drinking your post workout shake? Left it in your gym bag for two days? Left it in the car after a hot drive home?

You know the moment. You crack the lid. And you're hit by the smell of dry rotting protein lodged in the lid threads and packed into the seal. The (now) paste protein powder residue seems to be invincible and rejects any attempt to remove it with a sponge or cloth like some kind of nonchalant teenager.

You can scrub it. You can leave it soaking in hot water and soap. And you'll likely get rid of the dried powder. But the smell? The vomit inducing stench? That may never leave.

Used gym shakers test positive for bacterial contamination 83% of the time (Lopes, 2018). One in four carry Staph. Half of you reading this email are pouring something into one of those subpar shakers for your daily protein.

But the bacteria isn't the part we want to talk about today (as much as anyone might really want to talk about bacteria). Today, we want to talk about the plastic.

"BPA-free" was a popular sticker all the way back in 2015, but remains a 2025 problem.

When BPA got banned, the plastics industry swapped it for similar chemicals called BPS and BPF. Not just cousins, essentially immediate family. These imposters (BPS and BPF) hit your hormone system at the same strength (Rochester & Bolden, Environmental Health Perspectives, 2015). The Endocrine Society's (who are not setting out to indoctrinate you…we don't think) official position (EDC-2, 2015) links the whole family of chemicals (i.e. BPA, BPS and BPF) to obesity, diabetes, fertility issues and hormone-sensitive cancers. Hmm. Yummy.

What factors pull these dangerous chemicals from your plastic shaker into your shake? Heat. Scrubbing. Protein residue.

In other words, all the daily activities you put your protein shaker through.

Then it gets worse.

A liter of bottled water now carries roughly 240,000 plastic particles, 90% of them small enough to count as nanoplastic (PNAS, 2024). Heat and agitation are what release them from the plastic.

These dangerous particles don't just leach into your drink once shaken. And they don't just pass through your body either.

Nope.

They settle in your brains, arteries, testicles (for men) and breast milk (for women). People with microplastic deposits in the artery up the side of their neck had a 4.5× higher risk of heart attack, stroke or death over a 34-month follow-up (NEJM, 2024). So, being careful about choosing your protein is important (and we commend you for that). But we all need to be just as careful about what we use to drink it out of.

That's why our shaker is stainless steel. Steel doesn't shed plastic. No residue trapped in plastic threads.

Also, it doesn't retain the old protein smell (which each of us, me, Josh and Iain having all been guilty of leaving our shakers unwashed by mistake – can personally verify).

The chain you're building (clean ingredients, clean protein, clean testing) belongs in a clean shaker so it remains as pure as it is in the pouch.

One more thing. As you may know, we don't run sales on our protein. We won't. It's a pet hate of ours when brands hand discounts to brand-new customers and ignore their long-term customers (it's not fair and we stick to that)

You're on our list. And we value you.

So for this Memorial Day weekend: we're offering a 20% discount off our shaker. This is on top of the discount you already get if you're a subscriber.

The discount code is: 9R2NVEQTCWTK.

Even if you've never bought our protein. Even if you never plan to. You should be protecting yourself from the chemistry above.

Get the shaker →

Stay healthy,

Jason
RISE311

P.S. If you want the reading list, here are the four studies that made us build the shaker in stainless steel instead of plastic:

- Bacterial contamination in used gym shakers (Lopes, 2018)
- BPA-free isn't free: BPS, BPF and endocrine activity (Rochester & Bolden, Environmental Health Perspectives, 2015)
- Nanoplastics in bottled water (PNAS, 2024)
- Microplastics in carotid plaques and 4.5× cardiovascular risk (NEJM, 2024)

Website: www.rise311.com
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Rise Nutritionals, LLC 4500 Park Granada, Suite 202 Calabasas, CA 91302