Astroglide review, one brand with the best and worst bottles on the index
The original blue bottle is one of the highest osmolality readings ever published. Two other Astroglide bottles are among the best. Here is which one to buy, which one to skip, and how to tell them apart on the shelf.
By the Wet Betty editors · Published Oct 17, 2026
Fact checked against FDA 510(k) filings, WHO guidance and the sources listed below. How we review
Astroglide is two brands in one bottle shape. The original Astroglide Liquid measures 6,113 to 8,064 mOsm/kg, one of the highest readings ever published. Astroglide Glycerin and Paraben Free (230 to 300) and Ultra Gentle Gel (200 to 300) both pass the WHO ideal of 380. Buy either of those. Skip the original.
The verdict.
Skip the original Astroglide Liquid at 6,113 to 8,064 mOsm/kg and buy Astroglide Glycerin and Paraben Free or Ultra Gentle, which both pass the WHO ideal.
- Skip it: Astroglide Liquid (original)
- Best liquid: Astroglide Glycerin and Paraben Free
- Best gel: Astroglide Ultra Gentle Gel
What it is.
Astroglide is one of the two best known lube brands in American drugstores, alongside K-Y. The name covers a whole family: the original liquid, a gel, a glycerin and paraben free liquid, the Ultra Gentle gel for sensitive skin, a silicone, a warming line, and more.
Most shoppers treat that family as one product. It is not. The formulas are different, and on the one number that best predicts irritation, they land at opposite ends of our index.
What is in it.
The original Astroglide Liquid contains glycerin and parabens. Glycerin is what makes it so slippery and so concentrated. Parabens are the preservative.
Astroglide Glycerin and Paraben Free and Astroglide Ultra Gentle are, as the names say, free of both. The brand positions Ultra Gentle for sensitive skin and says it is fragrance free. The liquid is thinner. The gel stays where you put it.
That single swap, glycerin out, is the whole story of this page. Glycerin dissolved in water raises osmolality, and the WHO advisory on lubricants names it as one of the ingredients to keep low.
How it measures.
Osmolality. The WHO calls 380 mOsm/kg or under ideal and 1,200 the ceiling.
- Astroglide Liquid (original): 6,113 to 8,064, from the published lab data compiled by Edwards and Panay. That is 16 to 21 times the ideal and more than five times the ceiling.
- Astroglide Glycerin and Paraben Free: 230 to 300, from the brand's FDA 510(k) filing. A pass.
- Astroglide Ultra Gentle Gel: 200 to 300, from its 510(k) filing. A pass.
A lube far above your own tissue (around 260 to 290) pulls water out of cells. That is the mechanism behind the sting and the drying out later, and in lab studies, damage to the surface layer of the tissue.
pH. A healthy vagina runs 3.8 to 4.5. The original measured 4.0, which is fine. The two newer bottles carry a filed range of 3.5 to 5.5. That is wide. It means the filing allows for a little drift either side of the target, not that the product misses it.
On paper, the newer bottles win clearly. The full ledger is in the lube index.
Who it suits.
Astroglide Glycerin and Paraben Free suits almost anyone who wants a cheap drugstore liquid that passes the test. Astroglide Ultra Gentle suits sensitive skin, menopause and anyone who dislikes reapplying, because a gel holds its place longer. Both work with condoms and every toy.
Who should skip it.
Anyone reaching for the original blue bottle. If you have ever thought you were sensitive to lube, this is often the bottle that taught you that. Also skip the warming versions for vaginal use; we have no published numbers for them, and warming effects in general come from glycols that push osmolality up.
How it compares.
| Astroglide Liquid (original) | Astroglide Glycerin and Paraben Free | Astroglide Ultra Gentle Gel | |
|---|---|---|---|
| Osmolality (mOsm/kg) | 6,113 to 8,064 | 230 to 300 | 200 to 300 |
| pH | 4.0 | 3.5 to 5.5 (filed range) | 3.5 to 5.5 (filed range) |
| Passes WHO ideal | No | Yes | Yes |
| Glycerin free | No | Yes | Yes |
| Paraben free | No | Yes | Yes |
| Texture | Liquid | Liquid | Gel |
| Condom and toy safe | Yes | Yes | Yes |
Which version to buy.
- You want a liquid. Astroglide Glycerin and Paraben Free.
- You want a gel, have sensitive skin, or are dealing with menopause dryness. Astroglide Ultra Gentle Gel.
- You want silicone. Astroglide sells one, but we have not graded it. Our silicone pick is in the Uberlube review.
- Anything warming or tingling. Not graded, not recommended for vaginal use.
On the shelf, read the front label, not the color. Look for the words "Glycerin and Paraben Free" or "Ultra Gentle." If neither phrase is there, put it back.
Pros
- Passes the WHO ideal band at 230 to 300
- Cheap and sold in every drugstore
- Condom and toy safe
Cons
- Easy to confuse with the original blue bottle
- Wide filed pH range, 3.5 to 5.5
| Osmolality | WHO band | pH | Glycerin free | Latex condom safe | Silicone toy safe |
|---|---|---|---|---|---|
| 230 to 300 mOsm/kg | Ideal | 3.5 to 5.5 | Yes | Yes | Yes |
Our take. The drugstore pick that actually passes. Not the blue-bottle original, which runs thousands of mOsm/kg.
Pros
- Gel that stays where you put it
- 200 to 300 mOsm/kg
- Made for sensitive skin, fragrance free
Cons
- Gel can feel heavier than a liquid
- Wide filed pH range
| Osmolality | WHO band | pH | Glycerin free | Latex condom safe | Silicone toy safe |
|---|---|---|---|---|---|
| 200 to 300 mOsm/kg | Ideal | 3.5 to 5.5 | Yes | Yes | Yes |
Our take. A gel that stays put, built for sensitive skin, and in the safe osmolality band.
Pros
- Very slippery
- Cheap
Cons
- 6,113 to 8,064 mOsm/kg, among the highest ever measured
- Contains glycerin and parabens
- Frequently blamed for irritation
| Osmolality | WHO band | pH | Glycerin free | Latex condom safe | Silicone toy safe |
|---|---|---|---|---|---|
| 6,113 to 8,064 mOsm/kg | High | 4 | No | Yes | Yes |
Our take. Slippery, cheap, and one of the highest osmolality readings ever published. Buy the Glycerin and Paraben Free version instead.
Where to buy it.
Every Astroglide version is sold on Amazon and in most pharmacies and supermarkets, and the Astroglide official site shows the whole line. On Amazon, multi packs and look alike bottles are common, so confirm the exact product name in the listing title before you add it to the cart. Start here: Astroglide Glycerin and Paraben Free on Amazon.
Frequently asked questions.
Is Astroglide safe?
The original Astroglide Liquid is not toxic, but at 6,113 to 8,064 mOsm/kg it is one of the most concentrated lubes ever measured, far above the WHO ceiling, and it is often blamed for irritation. Astroglide Glycerin and Paraben Free and Ultra Gentle pass the WHO ideal and are the versions we recommend.
Can you use Astroglide with condoms?
Yes. Every Astroglide product on this page is water based and safe with latex, polyisoprene, polyurethane and nitrile condoms.
Which Astroglide is best?
Astroglide Glycerin and Paraben Free if you want a liquid, Astroglide Ultra Gentle Gel if you want a gel that stays put. Both are glycerin free, paraben free and inside the WHO osmolality ideal.
Does Astroglide expire?
Yes. The date is printed on the bottle. Throw it out past that date, or sooner if it separates, smells different or changes color.
Astroglide vs K-Y Jelly, which is better?
The original versions of both fail the WHO osmolality test, and Astroglide Liquid fails it by more. Astroglide Glycerin and Paraben Free beats both by a wide margin and sits on the same shelf.
