PRODUCT

Jack Black Intense Therapy Lip Balm SPF 25

It pairs avobenzone with octinoxate — and octinoxate destroys avobenzone. The UVA protection is likely well below what the label says.

At a glance

Texture — Waxy balm

Key Active — Avobenzone 3% + octinoxate 7.5% + petrolatum 40.2%

Best For — See below

Price Tier — $

SPF 25 lip balm
Everyday use, especially during outdoor activities

What stands out

Lip sun protection genuinely matters, and it is badly under-appreciated — see below for why.

40% petrolatum makes this a genuinely excellent lip balm. As a moisturizer for chapped lips, it works very well, and it lasts.

It has real UV filters and a real SPF 25, which most lip balms do not.

It is cheap, and people like how it feels.

Watch out for

It contains octinoxate alongside avobenzone — and octinoxate degrades avobenzone.

This is a well-documented chemical incompatibility. The two react in sunlight, and the pair loses roughly 45% of its UVA absorbance. The standard fix is to add octocrylene or a photostabilizer. Neither is in this formula.

So the UVA protection you actually get after real sun exposure is likely well below what the box implies. For a product whose entire job is protecting a high-risk site, that is a serious flaw. (Supergoop's lip balm, by contrast, is properly stabilized.)

It contains lanolin — one of the most common causes of cheilitis, an allergic reaction on the lips. If your lip balm is making your lips worse, lanolin is the first thing to suspect.

It contains flavour, which you then lick off and swallow.

Octinoxate is banned in Hawaii and Key West under reef-protection laws — awkward for a beach product.

Key ingredients

💧 Shea Butter — hydration
⛑️ Antioxidants — protect lips from UV rays

ℹ️ SPF 25 · reapply every 2 hours

Full ingredient list

Formulation Notes

Why lip sun protection is not a fussy detail — the stakes are genuinely high.

Actinic cheilitis — sun damage on the lip — turns into cancer in an estimated 10% to 30% of cases. That is higher than the rate for sun damage on ordinary skin.

And squamous cell carcinoma of the lower lip spreads to other parts of the body roughly four times more readily than the same cancer on skin.

Why the lower lip? It is angled straight at the sun. It has no melanin and no protective outer layer of dead cells — the two things that shield the rest of your skin.

The honest catch: eating, drinking and licking remove lip SPF within an hour or two. Reapply, and wear a hat — the hat is doing more work than the balm.

See where to buy