Your anti-aging peptide is secretly a toxic 'forever' chemical" — Transcript

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1. 0:00Peptides are having a moment, and if
2. 0:02you've been in a Sephora or scrolled
3. 0:04through a skincare brand's website
4. 0:06lately, you've probably noticed they're
5. 0:08on everything: serums, eye creams,
6. 0:10moisturizers. And the pitch is always
7. 0:13the same. Peptides signal your skin to
8. 0:15produce more collagen, so you get
9. 0:17firmer, smoother, younger-looking skin.
10. 0:19Peptide on an ingredient list is not a
11. 0:21single thing. And a subset of the ones
12. 0:24being marketed hardest have a chemistry
13. 0:26problem that most people don't know to
14. 0:29look for. I'm Dr. Yvonne Burkart, a PhD
15. 0:31toxicologist and mom of two, and I've
16. 0:33spent my career studying how
17. 0:35environmental chemicals interact with
18. 0:37the body. What I want to walk you
19. 0:39through today is something that I call
20. 0:41the fluorine swap, a modification some
21. 0:43manufacturers make to a peptide that can
22. 0:46turn it into a forever chemical. And
23. 0:48what makes this worth paying attention
24. 0:50to is that you're putting this on your
25. 0:51face every day and leaving it there.
26. 0:54Let's start with what a peptide actually
27. 0:55is, because the trend is real and the
28. 0:58underlying chemistry does work. Peptides
29. 1:00are short chains of amino acids. Your
30. 1:02body already makes thousands of them
31. 1:05naturally. In skincare, the ones that
32. 1:07get the most attention are the kind that
33. 1:09signal your skin cells to produce more
34. 1:11collagen, the structural protein that
35. 1:13keeps the skin firm. As collagen
36. 1:15production slows with age, skin starts
37. 1:17to lose that structure. So, the logic of
38. 1:19using a collagen signaling peptide
39. 1:22topically is legitimate. That part is
40. 1:24not the problem, though. The problem is
41. 1:26what some manufacturers do to a peptide
42. 1:28before it goes into the bottle. To make
43. 1:31a peptide more stable on the skin, last
44. 1:33longer, and resist breaking down, some
45. 1:35companies chemically modify it by adding
46. 1:37fluorine atoms to the structure. That
47. 1:40carbon-fluorine bond is one of the
48. 1:42strongest bonds in all of chemistry, and
49. 1:45it does not break down easily. That is
50. 1:47exactly the property that makes a PFAS a
51. 1:50forever chemical. PFAS stands for per-
52. 1:52and polyfluoroalkyl substances, and what
53. 1:54defines them as a class is that same
54. 1:57carbon-fluorine bond, which resists
55. 2:00degradation. So, the modification that
56. 2:02makes a peptide perform better in your
57. 2:04serum is the same modification that can
58. 2:06place it in the PFAS family. I call this
59. 2:09the fluorine swap, and there's a real
60. 2:11marketed anti-aging ingredient that's a
61. 2:13perfect example of this. It's called
62. 2:15trifluoroacetyl
63. 2:17tripeptide-2.
64. 2:18It shows up in anti-aging serums and
65. 2:21firming creams sold for smoothing and
66. 2:23lifting of the skin. I actually flagged
67. 2:25this one when I reviewed a celebrity
68. 2:27skin care line, and it's the one I want
69. 2:29to walk through here because the name
70. 2:32does the work for us. Trifluoro at the
71. 2:34front of the name means that three
72. 2:36fluorine atoms were added to this
73. 2:37peptide. That's the chemical
74. 2:39modification. That's the fluorine swap
75. 2:41right there in the ingredient name. And
76. 2:42here's why that matters. That fluorine
77. 2:45is what makes a PFAS a forever chemical.
78. 2:47It doesn't break down, not in the
79. 2:49environment, and not easily in the body,
80. 2:51either. So, when you apply a product
81. 2:53with this ingredient every morning and
82. 2:54every night, you're not just putting on
83. 2:56a peptide. You may be adding to your
84. 2:58daily chemical burden in a way that most
85. 3:01people have never thought to consider.
86. 3:02That's the part the anti-aging peptide
87. 3:04marketing does not tell you. So, a few
88. 3:06years ago, as I mentioned, I made a
89. 3:08video about a celebrity skin care brand
90. 3:10that marketed themselves as having
91. 3:12consciously clean formulas, which
92. 3:14eliminate over 2,700 ingredients of
93. 3:16concern, including specifically named
94. 3:19PFAS. So, at first glance, nothing
95. 3:21jumped out as obviously problematic, and
96. 3:23it looked like a decent brand. But, when
97. 3:25I looked closely at the ingredients list
98. 3:27on a moisturizer, I noticed a
99. 3:28fluorinated peptide, specifically
100. 3:31trifluoroacetyl tripeptide-2. I did a
101. 3:33double-take because here was a brand
102. 3:35whose own product directly contradicted
103. 3:38its marketing, and it was not obvious at
104. 3:40first glance because there was a
105. 3:41separate page that mentioned
106. 3:43specifically about the ingredients that
107. 3:44they don't use or ban in their products,
108. 3:47but then I checked the ingredients list
109. 3:48on the actual product page, and there it
110. 3:50was, just like staring at me. So, I was
111. 3:53pretty surprised. And that's exactly why
112. 3:55this is worth knowing how to spot
113. 3:57yourself rather than relying on a
114. 3:59brand's claims about what it has or
115. 4:01hasn't eliminated. So, you might be
116. 4:03thinking, "Well, don't a lot of
117. 4:04ingredients absorb into the skin and
118. 4:06just get processed out?" Well, that's a
119. 4:08fair question, but skin care is
120. 4:10different from something you rinse off.
121. 4:12In this case, the moisturizer is a
122. 4:13leave-on product that you put it on the
123. 4:15same place on your face every day for
124. 4:18several years. And what the research is
125. 4:20starting to show is that skin absorption
126. 4:22from fluorinated cosmetics may be a more
127. 4:25significant PFAS exposure route than
128. 4:28most people have considered. A 2025
129. 4:30study published in Environmental Science
130. 4:32and Technology screened 64 beauty
131. 4:34products and found PFAS in 61 of them.
132. 4:37For products that listed a fluorinated
133. 4:39ingredient specifically, exposure levels
134. 4:41were significantly higher. For regular
135. 4:43users, the estimated daily exposure from
136. 4:45those fluorinated products exceeded the
137. 4:48European Food Safety Authority's
138. 4:50recommended threshold. The researchers
139. 4:52noted that dermal absorption from
140. 4:54fluorinated compounds ranked as the
141. 4:56second largest PFAS exposure route in
142. 4:59the general population after food. That
143. 5:01study tested cosmetics on a broad scale,
144. 5:04which included sunscreens, foundations,
145. 5:06cleansers, not peptide serum
146. 5:08specifically. But, the chemistry is the
147. 5:10same. Fluorinated ingredient, same
148. 5:12carbon-fluorine bond, same absorption
149. 5:14question. PFAS as a class have been
150. 5:17associated in research with endocrine
151. 5:19disruption, immune effects, cancer, and
152. 5:22other health concerns. The evidence is
153. 5:24still developing, and I want to be
154. 5:26careful not to overstate what we
155. 5:28currently know. But, that's exactly why
156. 5:30the exposure route matters. And I want
157. 5:32to say this clearly. This is not a
158. 5:34reason to panic or a reason to clear out
159. 5:36everything in your skin care cabinet.
160. 5:37That's not what this is about. It's a
161. 5:39reason to understand what you're
162. 5:41actually applying so you can make an
163. 5:43informed decision. Now, here's where
164. 5:45where label problem comes in, and it's a
165. 5:46real gap, and it's not an accident. A
166. 5:48fluorinated peptide almost never
167. 5:50announces itself on the package as a
168. 5:53PFAS. It shows up under its full INCI
169. 5:56name, which stands for the International
170. 5:57Nomenclature of Cosmetic Ingredients. It
171. 6:00can be long, and it might sound highly
172. 6:02chemical, and it's easy to scroll past.
173. 6:04Research has shown that fluorinated
174. 6:06cosmetics can carry PFAS even beyond
175. 6:08what's listed, including breakdown
176. 6:10products and precursors that weren't
177. 6:12declared by the manufacturer. Companies
178. 6:15aren't required to flag fluorinated
179. 6:17ingredients in a way that a shopper
180. 6:19would recognize as a PFAS signal. So, a
181. 6:21product can say clean on the front and
182. 6:23anti-aging peptide complex in the
183. 6:25marketing, while a fluorinated compound
184. 6:27sits in the ingredient list with no
185. 6:29indication of what it actually is. I
186. 6:32understand why that's frustrating to
187. 6:33hear, and tighter regulation around
188. 6:36ingredient disclosure would genuinely
189. 6:38help close this gap. But, you don't need
190. 6:40to wait for that to make an informed
191. 6:42decision today. Here's what to look for.
192. 6:45Pull up the ingredients list on any
193. 6:46peptide product that you're using or
194. 6:48considering. You're looking for these
195. 6:50prefixes: fluoro, perfluoro, polyfluoro,
196. 6:53or trifluoro. Any peptide name that
197. 6:56starts with one of these is a
198. 6:57fluorinated compound. Not every peptide
199. 7:00is fluorinated, and the majority are
200. 7:02not. So, this is not about avoiding
201. 7:05peptides altogether, but rather it's
202. 7:06about knowing the one prefix in the
203. 7:09ingredient name that tells you that
204. 7:11something different is going on. And you
205. 7:13don't need to memorize chemistry to do
206. 7:15this. All you need to do is recognize
207. 7:17those four prefixes, and a quick scan of
208. 7:20the ingredients list is all it takes.
209. 7:22And remember that peptides are not the
210. 7:24problem. The fluorine swap is the one
211. 7:26thing to watch out for, and now you know
212. 7:28exactly what it looks like. One prefix
213. 7:30on a label, and you'll catch it every
214. 7:32time. Peptides can genuinely be good for
215. 7:35your skin. In fact, I use a peptide
216. 7:36serum, and I think it's great. Knowing
217. 7:38this one thing means that you get to use
218. 7:40them without that uncertainty hanging
219. 7:43over the decision. I covered this same
220. 7:45kind of label reading skill, how to spot
221. 7:47what marketing won't tell you in The
222. 7:48Low-Tox Solution, my new book, which is
223. 7:51available for pre-order now. I've gone
224. 7:52ahead and added the link to the
225. 7:54description. Now, remember how we talked
226. 7:55about PFAS resisting breakdown, not in
227. 7:58the environment and not in the body. A
228. 7:59lot of them are also lipophilic, meaning
229. 8:01they're attracted to fat and tend to
230. 8:03accumulate in fat tissue over time.
231. 8:05There's a specific moment when what's
232. 8:08stored in the fat tissue doesn't stay
233. 8:10stored. And what triggers it is
234. 8:11something that most people think of as
235. 8:13one of the healthiest decisions they can
236. 8:15make, weight loss. I call it the fat
237. 8:17release effect, and it's one of the most
238. 8:19important pieces of context that almost
239. 8:21never makes it into mainstream weight
240. 8:23loss conversations. In my next video, I
241. 8:25walk you through exactly what gets
242. 8:27released when fat cells break down, why
243. 8:28the pace matters more than what people
244. 8:31realize, and three things you can do to
245. 8:33actively support your body while it's
246. 8:35happening. I'll see you on the next
247. 8:36video.