Why protein powder lost its place in my routine

That’s when it hit me—protein, even in its “cleanest” form, is counterproductive if you’re consuming more than your system can handle.

#3 Some protein powders contain additives and artificial sweeteners

Protein powders come in a tempting array of flavours: chocolate, vanilla, strawberry and more. But behind the sweet, sippable convenience is a less palatable truth. Many of these blends rely on additives and artificial sweeteners to improve taste and texture. My favourite was a strawberry-chocolate mix—sweet, creamy and easy to drink.

The downside is that these ingredients can disrupt the gut microbiome. Artificial sweeteners like aspartame and acesulfame K have been linked to an imbalance in gut bacteria, which may affect everything from digestion to immunity. In the editor’s case, it seemed to worsen his hay fever, which became so severe he could no longer step out without medication.

Some sweeteners have also raised concerns for their potential carcinogenic effects, although the research remains inconclusive.

Other ways to hit your protein goals

After giving up protein powder almost immediately, the discomfort disappeared. The bloating eased. The persistent, gassy heaviness lifted. There was only one catch: post-workout recovery. Without the usual protein shake, my sessions felt slightly less effective. Muscles that had been pushed hard weren’t getting the nutrients they needed to repair and rebuild.

That’s where amino acids came in. With smaller molecules and better bioavailability, they offered a gentler, more efficient alternative.

Amino acids are the fundamental building blocks of protein—think of them as links in a chain. When taken in isolated form, such as EAA (essential amino acids) or BCAA (branched-chain amino acids), they’re easier to digest and less likely to disrupt the gut. For those with sensitive stomachs or low stomach acid, they can be a more forgiving supplement, supporting recovery without the side effects.

This isn’t a blanket argument against protein. If your digestion is robust and your system processes it well, there’s no reason to avoid it. But the wellness world often highlights only the benefits, ignoring the fact that even a “healthy” supplement can be problematic for some. If you’re experiencing ongoing digestive issues and haven’t considered your protein intake, this might be the missing piece.

Editor: Misaki Kawatsu

This article first appeared on Vogue.co.jp

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