Can You Mix Apple Cider Vinegar With Epsom Salt?

Bath recipes that combine apple cider vinegar with Epsom salt show up all over wellness blogs and social media. The pitch sounds appealing: magnesium sulfate from the salt meeting acetic acid from the vinegar, all in warm water, promising sore muscle relief and smoother skin.

The honest answer is that no strong scientific study has tested this specific combination. What exists is a mix of popular practice, anecdotal experiences, and a few relevant studies on each ingredient separately. This article covers what the combination involves, what the research actually says, and the safety steps worth following.

What The Combination Is Supposed To Do

Epsom salt is magnesium sulfate, a mineral compound long used in baths for muscle relaxation. Apple cider vinegar is a fermented liquid that contains acetic acid, which some people believe helps balance skin pH.

Proponents claim the two work together to soothe sore muscles, soften skin, and reduce body odor. A basic DIY recipe calls for 2 cups of Epsom salt, 1 cup of baking soda, and 1 cup of apple cider vinegar added to a warm bath.

For a foot soak, a common recipe combines apple cider vinegar, hot water, and Epsom salt, stirred until the salt dissolves completely. Some beauty experts recommend adding detoxifying Epsom salts to an apple cider vinegar bath along with essential oils.

Why People Try The Mix

Most people trying this combination are looking for a natural, low-cost alternative to commercial bath products. The appeal is that both ingredients are inexpensive, shelf-stable, and already common in many kitchens and bathrooms.

Anecdotal reports often mention several hoped-for outcomes:

• Sore muscle relief: Epsom salt is traditionally used for post-workout recovery, and adding ACV is thought by some to amplify the effect, though no study confirms this synergy.
• Skin softening and exfoliation: The acetic acid in ACV may help remove dead skin cells, while the salt provides gentle physical exfoliation when scrubbed.
• Odor reduction: ACV’s antimicrobial properties may help with foot odor, and Epsom salt can act as a deodorizing agent in a foot soak.
• pH balancing: Some sources claim the combination helps restore the skin’s natural acidic pH, though the effect likely varies by person and dilution.
• General “detox” feeling: Many users report feeling relaxed and refreshed after the soak, though the term “detox” has no standardized medical meaning in this context.

The common thread is that none of these benefits have been rigorously tested for the ACV-and-Epsom-salt combination specifically. What works for one person may not work the next.

What The Evidence Actually Says

When you separate the two ingredients, the research picture is modest. A 2021 study published in the peer-reviewed journal Pediatric Dermatology tested daily soaks in 0.5% apple cider vinegar for people with atopic dermatitis. The study found that ACV soaks are not an effective method for altering the skin bacterial microbiome, contradicting some popular claims about “detox” benefits.

For individual use, a dermatologist from Nebraska Medicine notes that apple cider vinegar is generally recommended for those with oily and acne-prone skin. It can be used as a toner, spot treatment, or facial cleanser — but those are leave-on or rinse-off applications, not long soaks.

A Healthline overview of ACV baths points out that there is no evidence to suggest apple cider vinegar can help soothe a sunburn, and it may actually cause irritation on already-damaged skin. That’s worth noting if you’re considering an ACV bath after sun exposure.

The evidence for Epsom salt alone is similarly anecdotal for most claimed benefits. Magnesium is absorbed through the skin, but the amount that enters the bloodstream from a 20-minute bath is likely small compared to dietary magnesium.

This table summarizes that most of the excitement around the combo comes from tradition and personal stories, not from clinical trials. The strongest research (the 2021 study) actually undermines a key claim about microbiome changes.

How To Try It Safely

Safety is the main priority if you decide to mix apple cider vinegar with Epsom salt. Both ingredients can irritate the skin if used in the wrong concentration or for too long.

1. Start with a low concentration: Use no more than 1 cup of ACV and 1-2 cups of Epsom salt for a standard bathtub. For a foot soak, use about 1/4 cup of each.
2. Test on a small patch first: Apply the diluted mixture to a small area of skin on your inner arm and wait 10 minutes. If you feel stinging or see redness, skip the full bath.
3. Limit soak time: 15 to 20 minutes is a reasonable max for most people. Longer soaks increase the risk of dryness and irritation.
4. Moisturize afterward: Epsom salts can be drying to the skin, so apply a fragrance-free moisturizer immediately after rinsing and patting dry.
5. Avoid if you have certain skin conditions: If you have severe skin inflammation, a skin infection, open wounds, or active eczema, skip the bath entirely and consult a dermatologist first.

One NIH/PMC study on ACV soaks found that daily treatment at 0.5% concentration did not alter skin bacteria but also did not cause harm in the study group. That’s a decent safety sign for occasional use.

The Takeaway On Doses And Expectations

For a full-body bath, a typical recipe from lifestyle sites suggests 2 cups of apple cider vinegar with a sprinkle of Epsom salts, soaking for 20-30 minutes. A foot soak variant uses 2 gallons of warm water, 1 cup of Epsom salts, 1 cup of Dead Sea salt, ½ cup of bentonite clay, and ½ cup of apple cider vinegar.

These are popular DIY recipes, not clinically tested formulas. Adjust for your own skin sensitivity. If your skin feels tight, stings, or becomes red, rinse off immediately and skip future soaks.

Regarding the microbiome question — the 2021 study specifically found that daily ACV soaks did not meaningfully change the skin’s bacterial ecosystem in people with eczema. That matters because some online sources claim the combo “restores” the skin microbiome. The ACV soak microbiome study suggests that claim is not supported by current research.

These amounts come from common DIY recipes, not medical guidelines. Stick to the lower end if you have sensitive skin or are trying the combination for the first time.

The Bottom Line

Mixing apple cider vinegar with Epsom salt in a bath or foot soak is generally safe for most people when done in moderation. The combination may provide relaxation and mild skin benefits, but the evidence is mostly anecdotal. A 2021 study specifically found that ACV soaks do not significantly alter the skin microbiome, so “detox” claims are not supported by research.

If you have sensitive skin, eczema, acne-prone skin, or any history of skin irritation, a dermatologist can give you personalized advice on whether an ACV and Epsom salt soak is right for your specific skin type and condition.