Launching Soon · Made in India

Bath salt that tells you
the truth.

Lavender Calm. Four ingredients, all named, with the percentage of each printed on the page. An Epsom salt base, lavender oil, and a claim list we can actually defend.

4Ingredients
450gKraft pouch
₹499Launch price
LavenderSingle scent

Most of what a warm bath does comes from the warm water. We say that out loud — then name every ingredient, its share of the pouch, and exactly where the evidence for it stops.

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Potter's EARTHFUSION Lavender CALM

Bath Salts: Uses, Benefits & What They Actually Do

The real science
that no one explains.

What a bath salt is, and what it actually does

A bath salt is a product you dissolve in bathwater. The salts dissolve into ions and change what is in the water. Warm immersion temporarily hydrates the outer layer of skin and changes blood flow. Fragrance changes how the whole thing feels. Those four ordinary mechanisms explain most of a good bath — without needing a mysterious one on top.

The distinction that matters: an ingredient having interesting research behind it is not the same as a finished product having a proven effect. We keep those two things apart, on purpose, everywhere on this site.

Why Epsom salt is the base

Epsom salt is magnesium sulfate — a water-soluble mineral salt with a long history of cosmetic use and a published safety assessment behind it. We use it as the mineral base of the soak. We do not use it as a way to get magnesium into your body, because the evidence does not support that.

Where we stop

Every claim we make is graded against the literature in our Lab Notes — established, emerging, contested, or no evidence — and the grading is published alongside the claim, not buried. Read the Lab Notes.

What does a bath salt do to your skin?

Water and warmth temporarily raise the hydration of the outer skin layer, which is why skin can feel softer straight after a soak. That effect is real but short-lived, and it is not the same as repairing a damaged skin barrier. Whether a specific product does more than that depends on evidence for that product.

What water temperature should you use?

Comfortably warm, not hot. Hotter water increases skin water loss and redness, and puts more load on your circulation. There is no single number that marks the safe line for everyone — comfort is the better guide, and shorter is better if your skin runs dry.

Does hard water matter?

Hard water does affect skin, but the documented route is calcium reacting with soap and leaving a residue — not the water alone. We have not tested Lavender Calm against hard water, so we make no hard-water performance claim for it. We cover what the research actually shows in the Lab Notes.

Does detox bath salt work?

No. Your liver and kidneys handle that work. There is no established mechanism by which dissolved salts pull unspecified toxins out of your bloodstream, and sweating in a hot bath is not evidence of one. A bath can be genuinely relaxing without needing a detox story attached.

Our Standard

We won’t sell you
science we don’t have.

Most bath salt marketing promises more than the evidence can carry. Magnesium replenishment. Detoxification. Toxin removal. These sell well and they do not hold up.

So we split everything into two lists and publish both. What we will not claim, and what we will. If that second list is shorter than you expected from a wellness brand, that is the point.

What we won’t claim

Replenishes magnesium
Meaningful absorption through intact skin is not established.
Detoxifies / draws out toxins
No credible mechanism and no evidence behind it.
Treats anxiety or lowers cortisol
Not something we can support for this product.
Proven skin or muscle benefit
Ingredient research is not product evidence.

What we do say

Four ingredients, percentages published
Nothing hidden behind a “proprietary blend.”
The warm water does most of the work
We explain what the rest of the pouch is for.
Every claim graded and sourced
Established, emerging, contested, or no evidence.
When we don’t know, we say so
Including about our own product.

Full Transparency

Every ingredient
every reason.

Four ingredients. Every one named, with its percentage, its job, and the point where we stop claiming things for it.

Most brands publish an ingredient list because they have to. We publish the ratios because the ratios are the formulation — and because a list you can check is worth more than a promise you can’t. Each ingredient has a full reference page if you want to go deeper.

Browse the ingredient reference library.

Epsom Salt 80%

Magnesium sulfate — the mineral base of the soak. It dissolves into magnesium and sulfate ions and changes what is in your bathwater. It does not soften hard water, and it does not deliver magnesium into your body through intact skin.

Zea Mays Starch 12.5%

Corn starch, included as a dry-blend formulation ingredient. We are not publishing what it does to the water or to skin-feel until the supplier’s technical data sheet is in hand and we have tested the blend ourselves. No anti-inflammatory claim, and no hard-water claim.

Colloidal Oatmeal 4.5%

Finely milled whole oat, used as a skin-conditioning ingredient in bath and skincare formulations. Research on the raw material exists, and that is not the same thing as evidence for this pouch — we have not run a skin study on this formulation, so we make no skin claim for it.

Lavender 40/42 3%

The lavender oil in the formulation, here for the scent and nothing else. Grade, botanical source and composition will be published once the supplier’s certificate of analysis is in hand. We do not claim it treats anxiety or acts on GABA-A receptors.

Built Here, Honestly

Made with purpose.
Explained with evidence.

Tub, bucket or basin

Not everyone has a bathtub, and a bath salt does not need one — it dissolves into whatever you are bathing with. A bucket bath and a foot soak are different exposures rather than smaller copies of the same bath, which is why the directions on the pack matter more than a number off the internet.

One scent, done properly

No colourants, no botanical confetti, no second fragrance. Lavender oil at 3% and nothing competing with it — which also means that if your skin ever reacts, there is a short list of things it could be.

A pause, not a prescription

Use it after training or at the end of a long day because the bath itself is worth the time, not because we have promised you a recovery protocol. We haven’t, and we won’t.

What we haven’t tested yet

Hard water is a real variable in a lot of Indian bathrooms. The documented mechanism runs through soap reacting with calcium and leaving an irritating residue — not through the water on its own. A soap-free mineral soak plausibly avoids adding to that, but plausible is not proven: we have not tested Lavender Calm against hard water, and we are not going to publish an inference as a result. If we do test it, the finding goes here either way.

Four steps. No theatre.

Use it
properly.

Warm, not hot

Hotter water increases water loss through skin and puts more load on your circulation — it feels more dramatic without being better for you. Comfortably warm is the target.

Fill first, then add

Add the amount on the pouch to water that is already in the tub or bucket, and stir it through. That spreads it evenly instead of leaving a concentrated patch sitting against your skin.

Soak while it’s comfortable

There is no established therapeutic duration, and longer is not automatically better. If you’re using it before bed, the research on warm bathing points to finishing an hour or two before you sleep.

Pat dry, then moisturise

Bathing lifts skin hydration temporarily and then it drops back. If your skin runs dry, moisturiser onto slightly damp skin is the standard dermatology advice — and it matters more than anything in the pouch.

Lab Notes

The science behind every decision.
In long form.

38 articles. Every claim graded — established, emerging, contested, or no evidence — and sourced. Written for someone who wants to understand, not just be sold to.

All Articles →
Bath Salt Basics
How Do Bath Salts Work?
The warm water is doing most of the work. The minerals and the essential oil enhance and extend what the heat is already producing.
6 min read
Bath Salt Basics
Hot Bath vs Warm Bath: What the Science Says
Both change your physiology. Hotter water produces greater thermal and cardiovascular stress, so it is a trade-off between comfort and heat load.
4 min read
Bath Salt Basics
Are Bath Salts Safe for Daily Use?
There is no universal daily-safe number. It depends on your skin, the formulation, the temperature and how long you soak.
4 min read
Product Comparisons
Can You Use Bath Salts and Bath Bombs Together?
Yes. There is no good evidence that Epsom salt cancels a bath bomb’s fizz — the two are doing different things in the water.
7 min read
Bath Salt Basics
Can Bath Salts Irritate Skin?
Skin reacted after a soak. Before blaming the minerals, look at the water temperature, the fragrance and your skin barrier.
7 min read
Product Comparisons
Bath Salts vs Bath Soak: What Is the Difference?
Bath soak is a category label. Bath salts are a specific mineral-based formulation within it.
4 min read
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