Bicarb vs Bicarb Free Natural Deodorant: Which One Is Right for You?
You've decided to switch to natural deodorant. Smart move. Then you've hit the next decision and stalled.
Bicarb. Or bicarb free.
This question is the single most common one we get from women starting out, and the answer matters more than you'd think. Choosing the wrong formula for your skin is one of the biggest reasons women try natural deodorant once and write the whole category off.
Here's everything you need to make the right call the first time.
What Is Bicarb and Why Is It in Deodorant
Bicarb (bicarbonate of soda, baking soda, sodium bicarbonate) has been used for odour control for generations. Two reasons it's effective.
It neutralises odour. Bicarb is alkaline. The compounds bacteria produce when breaking down sweat are acidic. Bicarb neutralises them at the source. The smell doesn't get masked, it gets eliminated.
It absorbs moisture. Bicarb soaks up surface moisture, keeping the underarm drier and creating an environment where odour causing bacteria struggle to thrive.
It's seriously effective. That's why it's a key ingredient in our Original and The Man formulas, and why it's a staple across most natural deodorant brands.
What Is Bicarb Free Deodorant
Bicarb free deodorants control odour and moisture using different ingredients. They're built specifically for women whose skin doesn't tolerate bicarb's alkalinity.
The common alternatives:
Magnesium hydroxide. Neutralises odour causing bacteria at a skin friendly pH. The hero ingredient in most bicarb free formulas.
Arrowroot powder or tapioca starch. Absorbs moisture naturally without affecting pH.
Zinc oxide. Mildly antimicrobial, calming on the skin.
Essential oils. Natural antibacterial action, plus the fragrance.
Our Friendly Bicarb Free uses magnesium hydroxide and arrowroot to give effective odour control with none of the bicarb pH shift.
The Honest Pros and Cons
Bicarb based
The strengths. Strongest odour neutralisation in the natural deodorant category. Works brilliantly for women with stronger body odour, higher sweat output, or active lifestyles. Long lasting protection. Generally a more affordable formula.
The trade offs. The alkalinity can irritate sensitive skin. Some women experience redness, itching, or a burning sensation, especially after shaving. Not the right choice if you have eczema, dermatitis, or generally reactive skin.
Best for. Women with normal skin who've never had a bicarb reaction, especially if you're active or want maximum odour protection.
Bicarb free
The strengths. Gentle on sensitive skin. Won't sting after shaving. Maintains your skin's natural pH. Still genuinely effective for most women, just through different chemistry.
The trade offs. May need a midday top up if you sweat heavily or have a high activity day. Often slightly pricier because the alternative ingredients cost more.
Best for. Women with sensitive skin, anyone who's reacted to bicarb in the past, regular shavers who want zero post shave irritation.
How to Know Which One Is Right for You
Start with bicarb based if you tick these:
You have normal skin without sensitivity history.
You've used baking soda based products before with no reactions.
You sweat heavily or have an active lifestyle.
You want the strongest odour control natural deodorant can offer.
You don't experience irritation after shaving with most products.
You're on a budget.
Start with bicarb free if you tick these:
You have sensitive skin or skin conditions like eczema or dermatitis.
You've experienced irritation, redness, or itching from a bicarb deodorant before.
You shave your underarms regularly and want to avoid any sting.
You prefer the gentlest possible formulation.
Your body odour is mild to moderate.
You're transitioning from antiperspirant for the first time and want the easiest possible adjustment.
What If You Honestly Don't Know
A safe rule. If you're uncertain, default to bicarb free for the first 3 to 4 weeks while your body adjusts to natural deodorant. Sensitivity often shows up during the transition window when your microbiome is rebalancing, and a bicarb formula in that window can compound any irritation.
Once your skin has settled, you can experiment with the bicarb option if you want stronger protection. Many women happily stay with bicarb free forever. Others land on bicarb. Both are valid landing places.
Can You Switch Between Them
Yes. And many women do.
Some use bicarb based daily and rotate to bicarb free on shaving days or during a hormonal flare. Others use bicarb free as their daily and bring out a bicarb formula for the gym or a hot summer day when they want extra protection.
Your skin's needs shift across the menstrual cycle, the seasons, your stress load, your activity. Having both options gives you flexibility instead of locking you into a single product.
How to Set Yourself Up for Success with Either
A few habits matter regardless of which formula you choose.
Give your body 2 to 4 weeks to adjust. Especially if you're coming off antiperspirant. The first 14 days are the hardest. Don't bail.
Apply to clean, completely dry skin. Pat dry properly after the shower. Damp skin reduces effectiveness.
Use a small amount. A pea sized amount of paste deodorant is plenty. More doesn't equal better. Over applying creates a layer that traps moisture and bacteria.
Wait 10 minutes after shaving. Particularly with bicarb formulas. Or use bicarb free on shaving days as a buffer.
Exfoliate 2 to 3 times a week. Gentle scrub or dry brush. Removes any product residue and helps your deodorant work better.
Stay hydrated and eat well. What you put in shows up in how you smell. Processed foods, alcohol, and excess sugar all increase body odour. Whole foods, water, and protein support cleaner sweat.
The Honest Truth on Effectiveness
Both formulas work. Bicarb is generally stronger on odour control. Bicarb free is generally gentler on the skin. Neither is "better." Better is whichever one your skin tolerates and you'll actually use every day.
A bicarb free deodorant you use daily and love is doing infinitely more for you than a bicarb deodorant sitting unused because it irritated you in week 2.
The Bottom Line
Choose bicarb if your skin is normal, you sweat heavily, or you want maximum protection.
Choose bicarb free if your skin is sensitive, you shave often, or you've had a bad reaction to bicarb before.
Both are aluminium free. Both work with your body, not against it. The right one is whichever fits your skin, not whichever is "stronger."
You don't have to be locked into one forever. You're choosing a starting point.
Ready to find your match? Explore the Bare + Free range. Three formulas, all aluminium free, all designed for Australian skin and Australian conditions. The Original and The Man are bicarb based. The Friendly Bicarb Free is for sensitive skin.